A Podcast that Explores how neuroscience is unraveling the mystery of how our brain makes us human
Brain Science is a monthly podcast Brain Science, hosted by Ginger Campbell, MD. We explore how recent discoveries in neuroscience are helping unravel the mystery of how our brain makes us human. The content is accessible to people of all backgrounds.
In response to listener requests, I recently interviewed Dr. Steven Novella from the Skeptics Guide to the Universe. This has been posted as Episode 16 of Books and Ideas , my other podcast. The details are available in the show notes on the Books and Ideas website. I hope you will consider subscribing to the podcast, but if you just want to hear the interview,
Dr. Fernando Cervero of McGill University has been studying pain since the beginning of his career back in the 1960s. These decades have seen tremendous advances in our neuroscientific understanding of what causes different types of pain, as well as changing attitudes. Pain was once regarded as something that most people had to endure, but now most of us demand adequate pain relief, sometimes even to the point of not tolerating minor pain. Dr. Cevero's new book, Understanding Pain, provides an accessible account of both the history of pain research and a thoughtful consideration of the challenges facing the field.
The latest episode of the Brain Science Podcast (BSP 93) is an interview with Dr. Cervero. This is Part 1 of a planned two-part series.
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Understanding Pain: Exploring the Perception of Pain, by Fernando Cervero.
Life Before Death (video)
Downtown Atlanta, Georgia February 19-21, 2013.
South by SouthWest: March 7-10, 2013 (Austin, TX, USA).
Johannesburg, South Africa April 8,9 2013.
I would love to some listener meetups, so please drop me an email at gincampbell at mac dot com, if you will be at any of these places on the right days.
Needed: at least 250 listeners to complete a VERY SHORT listener survey.
New: Brain Science Podcast listener campaign to get Dr. Campbell on Triangulation, which is an interview show on Leo Laporte's TWiT network: click here for contact information or send an email to pitches@twit.tv with BRAIN SCIENCE PODCAST in the subject line.
Next month's episode will be an interview with Benjamin Bergen, author of Louder Than Words: The New Science of How the Mind Makes Meaning; and I will be posting my follow-up interview with Jaak Panksepp on Books and Ideas.
Part 2 about Pain will be available in March.
Don't forget to get your copy of my eBook, Are You Sure? The Unconscious Origins of Certainty, from Amazon.com. If you don't have the Kindle app, just send me your Amazon receipt and I will send you the PDF.
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Bruce Hood, PhD
The Self Illusion: How the Social Brain Creates Identity, by Bruce Hood, is a fascinating look at how our brains create both our experience of the world and our sense of being a single, coherent self. As the word "illusion" in the title indicates, neither is exactly what it seems. When I interviewed Dr. Hood (BSP 88), he explained that The Self Illusion is a broad introduction to this somewhat surprising idea. TheSelf Illusion was written with a general audience in mind. For those already familiar with the topic, he also puts a new emphasis on the role of development. All readers should come away with a new appreciation for the critical role social interactions play through out human life.
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Books and Ideas #34: Bruce Hood talks about his first book, SuperSense. (mp3)
BSP 29: Dr. Maryanne Wolf, author of Proust and the Squid: The Story and Science of the Reading Brain. (mp3)
BSP 57: Dr. Chris Frith, author of Making up the Mind: How the Brain Creates Our Mental World. (mp3)
BSP 67: Thomas Metzinger, PhD, author of The Ego Tunnel: The Science of the Mind and the Myth of the Self. (mp3)
Books and Ideas #43: Dr. Carol Tavris explains the basics of cognitive dissonance. (mp3)
BSP 72: The Neuroscience of Magic. (Listen Now)
BSP 75: Dr. David Eagleman, author of Incognito: The Secret Lives of the Brain. (mp3)
Books and Ideas #48: Jonathan Gottschall, author of The Storytelling Animal: How Stories Make Us Human. (mp3)
SuperSense: Why We Believe in the Unbelievable, by Bruce M. Hood. (Audible link)
The Self Illusion: How the Social Brain Creates Identity, by Bruce Hood (Audible link)
Willpower: Rediscovering the Greatest Human Strength, by Roy F. Baumeister & John Tierney (Audible link)
Please see the FREE episode transcript for many additional references, including references to the scientific studies discussed in this podcast.
I will be in Philadelphia, PA October 16-21 to attend the AAFP annual meeting. Listeners who live in the area and physicians who are attended this meeting are invited to drop me an email if interested in getting together in person.
The latest episode of Books and Ideas is an interview with Jonathan Gottschall, author of The Storytelling Animal: How Stories Make Us Human. This episode continues some of the same themes explored in BSP 88.
Upcoming episodes: Discussion of Self Comes to Mind, by Antonio Damasio, and interviews with Evan Thompson (Mind in Life) and Jaak Panksepp (The Archaeology of Mind).
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Connect with other BSP fans: BSP Facebook Fan Page, Google +, Discussion Forum on Goodreads.com.
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Send me feedback at brainsciencepodcast@gmail.com
The latest episode of the Brain Science Podcast (BSP 71) is our 4th annual review episode. As usual, I review highlights from this year's interviews, but this year I added a new feature: my personal reflections on how the Brain Science Podcast has impacted my life. This episode also contains a special announcement for UK listeners.
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Emotions with Jaak Panksepp (BSP 65).
Memory with Randy Gallistel (BSP 66).
Consciousness with Thomas Metzinger (BSP 67).
Alzheimer's Disease with Peter Whitehouse (BSP 68 and Books and Ideas 36).
Glia Cells with R. Douglas Fields (BSP 69).
Pop Psychology Myths with Scott Lilienfeld (BSP 70).
Affective Neuroscience: The Foundations of Human and Animal Emotions, by Jaak Panksepp (BSP 65).
Memory and the Computational Brain: Why Cognitive Science will Transform Neuroscience, by C. R. Gallistel, Adam Philip King (BSP 66).
The Ego Tunnel: The Science of the Mind and the Myth of the Self,by Thomas Metzinger (BSP 67)
The Myth of Alzheimer's: What You Aren't Being Told About Today's Most Dreaded Diagnosis, by Peter J. Whitehouse and Daniel George (BSP 68 and Books and Ideas 36).
The Other Brain: From Dementia to Schizophrenia, How New Discoveries about the Brain Are Revolutionizing Medicine and Science, by R. Douglas Fields (BSP 69).
50 Great Myths of Popular Psychology: Shattering Widespread Misconceptions about Human Behavior, by Scott O. Lilienfeld, Steven Jay Lynn, John Ruscio, Barry L. Beyerstein (BSP 70).
For additional references: follow links to episode show notes.
The Brain Science Podcast app is now available for both iPhone and ANDROID (NEW!)
Be sure to subscribe to my Books and Ideas podcast. The next episode will come out in December.
The next episode of the Brain Science Podcast will come out in January 2010.
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Recent research has discovered that glial cells (the non-neuronal cells that make up about 85% of the cells in the human nervous system) actually do more than just support neurons. In Episode 69 of the Brain Science Podcast, I explore some of these recent discoveries with pioneering researcher, R. Douglas Fields, PhD. Dr. Fields is the author of The Other Brain: From Dementia to Schizophrenia, How New Discoveries about the Brain Are Revolutionizing Medicine and Science. The Other Brain provides a compelling introduction to this exciting new field. It is aimed at general readers, but it should also be on the must-read list for all students of neuroscience.
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The Other Brain: From Dementia to Schizophrenia, How New Discoveries about the Brain Are Revolutionizing Medicine and Science, by R. Douglas Fields (2010).
Glial Neurobiology: A Textbook, by Alexei Verkhratsky and Arthur Butt (2007).
Bullock, T. H., Bennett, M. V., Johnston, D., Josephson, R., Marder, E., Fields, R. D. "Neuroscience. The neuron doctrine, redux." Science 310. 5749 (2005): 791-3.
Perspectives.
Bullock, T. H. (2004) The Natural History of Neuroglia: an agenda for comparative studies. Neuron Glial Biology 1:97-100.
Fields, R. D. (2006) Beyond the Neuron Doctrine. Scientific American Mind June/July 17:20-27.
The Other Brain website.
R. Douglas Fields: Chief and Senior Researcher of the Section on Nervous System Development and Plasticity at the National Institute of Child Health and Human Development, which is part of NIH.
Dr. Ichiji Tasaki; worked at NIH for over 50 years and was a pioneering researcher of nerve conduction. (See the episode transcript for links to the other researchers that were mentioned in this episode.)
The Brain Science Podcast application for iPhone/Touch now contains transcripts for all episodes. Your reviews are greatly appreciated.
The next new episode of the Brain Science Podcast will come out in September, 2010.
Be sure to check out my other podcast Books and Ideas.
For more science podcasts go to http://sciencepodcasters.org.
Stay informed by subscribing to the BSP Newsletter.
Correction: Barbara Strauch is the author of The Secret Life of the Grown-up Brain: The Surprising Talents of the Middle-Aged Mind. (Note the correct spelling of STRAUCH)
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Episode 65 of the Brain Science Podcast is an interview with Jaak Panksepp, PhD, author of Affective Neuroscience: The Foundations of Human and Animal Emotions. Dr. Panksepp has done pioneering work on the neural origins of emotions. In this interview, we discuss how his work challenges some of the common assumptions about emotions and some of the important implications of his discoveries. New listeners may want to go back and listen to Episode 11 for an introduction to the neuroscience of emotion.
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New episodes of the Brain Science Podcast are always FREE. All episodes posted after January 1, 2013, are free. See the individual show notes for links the audio files.
Affective Neuroscience: The Foundations of Human and Animal Emotions, by Jaak Panksepp.
"How to Undress the Affective Mind: An Interview with Jaak Panksepp," S. Gallagher, Journal of Consciousness Studies, Volume 15, Number 2, 2008 , pp. 89-119(31).
"Affective consciousness: Core emotional feelings in animals and humans,"J Panksepp, Consciousness and Cognition 14 (2005)30-80. Elsevier. (available on-line via ScienceDirect.com)
Visit Dr. Panksepp's faculty page for more references.
John Bowlby: studied the effects of maternal deprivation, helped develop attachment theory.
John Cacioppo: developed the concept of social neuroscience.
Antonio Damasio: neurologist and author of several books including The Feeling of What Happens: Body and Emotion in the Making of Consciousness.
Walter Hess: work in the 1930's showed that stimulation of the cat hypothalamus led to anger. He shared the Nobel Prize in Medicine in 1949.
Tom Insel: Director of the National Institutes for Mental Health (NIMH).
William James: early pioneer of scientific psychology. The James-Lange Theory of emotion is an outdated theory that emotion result from the brain's interpretation of signals coming from the body.
Eric Kandel: won the Nobel Prize in 2000 for his work with memory in the Aplysia.
Brian Knutson: former student of Panksepp.
Joseph LeDoux: well-known for his work with fear and memory.
Endel Tulving: memory researcher at the University of Toronto.
For all the scientists mentioned see the episode transcript.
Send feedback to brainsciencepodcast@gmail.com.
Episode 64 of the Brain Science Podcast is our Third Annual Review Episode. It includes a review of some of the major ideas we talked about in 2009 and a look ahead to what I have planned for 2010.
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Teenagers: A Natural History, by David Bainbridge (BSP 63).
Play: How It Shapes the Brain, Opens the Imagination, and Invigorates the Soul, by Stuart Brown, MD (BSP 60).
Making up the Mind: How the Brain Creates Our Mental World, by Chris Frith (BSP 57).
Did My Neurons Make Me Do It?: Philosophical and Neurobiological Perspectives on Moral Responsibility and Free Will, by Nancey Murphy and Warren S. Brown (BSP 53 and BSP 62).
Out of Our Heads: Why You Are Not Your Brain, and Other Lessons from the Biology of Consciousness, by Alva Noë (BSP 58).
David Bainbridge, PhD: University Clinical Veterinary Anatomist from Cambridge University (BSP 63).
Stuart Brown, MD: retired psychiatrist and founder of the National Institute for Play (BSP 60).
Warren S. Brown, PhD: experimental psychologist from Fuller Theological Seminary (BSP 62).
Guy Caldwell, PhD: molecular biologist from the University of Alabama (BSP 59).
Patricia Churchland, PhD: neurophilosopher from University of California at San Diego (BSP 55).
Chris Frith, PhD: neuropsychologist from University College London (BSP 57).
Allan Jones, PhD: Chief Science Officer at the Allen Institute for Brain Research (BSP 61).
Eve Marder, PhD: neuroscientist from Brandeis University (BSP 56).
Michael Merzenich, PhD pioneer in neuroplasticity (BSP 54).
Alva Noë, Phd: philosopher from the University of California (BSP 58)
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Episode 63 of the Brain Science Podcast is an interview with David Bainbridge, author of Teenagers: A Natural History. Our focus is on how the brain changes during the teenage years. Bainbridge teaches veterinary anatomy and reproductive biology at Cambridge University and has published several other popular science books, including Beyond the Zonules of Zinn: A Fantastic Journey Through Your Brain , which I discussed back in Episode 32.
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David Bainbridge's Home page.
Teenagers: A Natural History, by David Bainbridge.
Beyond the Zonules of Zinn: A Fantastic Journey Through Your Brain, by David Bainbridge.
Episode 32: Introduction to Neuroanatomy based on Beyond the Zonules of Zinn by David Bainbridge.
Send feedback to gincampbell at brainsciencepodcast@gmail.com.
Episode 62 of the Brain Science Podcast is an interview with Warren Brown, PhD, co-author (with Nancey Murphy) of Did My Neurons Make Me Do It?: Philosophical and Neurobiological Perspectives on Moral Responsibility and Free Will. This book was discussed in detail back in Episode 53, but this interview gave me a chance to discuss some of the book's key ideas with Dr. Brown. We focused on why a non-reductive approach is needed in order to formulate ideas about moral responsibility that are consistent with our current neurobiological understanding of the mind.
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New episodes of the Brain Science Podcast are always FREE. All episodes posted after January 1, 2013, are free. See the individual show notes for links the audio files.
Did My Neurons Make Me Do It?: Philosophical and Neurobiological Perspectives on Moral Responsibility and Free Will, by Nancey Murphy and Warren S. Brown.
Episode 53 of the Brain Science Podcast: a detailed discussion of Did My Neurons Make Me Do It?
Tom Clark's review of Did My Neurons Make Me Do It?
Episode 30 of Books and Ideas: Dr. Campbell interviews Tom Clark about Naturalism and Did My Neurons Make Me Do It?
"Neuroscience and the Soul," letter in Science 2/27/09 Vol. 323, page 1168 (available on-line to AAAS members)
Additional References are included in the episode transcript.
In Episode 60 of the Brain Science Podcast, Ginger Campbell, MD, interviews Dr. Stuart Brown, author of Play: How It Shapes the Brain, Opens the Imagination, and Invigorates the Soul. Our focus is on the importance of play for normal mental development and psychological health. We also explore the importance of play in adults.
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Anthony Pellegrini, PhD (University of Minnesota): Studies rough and tumble play.
Brian Sutton-Smith, PhD (Strong Museum of Play, NY): studies the storytelling aspects of play.
John Ratey, MD (Harvard Medical School): author of Spark: The Revolutionary New Science of Exercise and the Brain.
Sergio Pellis, PhD (Canadian Centre for Behavioral Neuroscience): has studied rough and tumble play in mice and rats for many years.
Marian C Diamond, PhD (University of California-Berkeley): pioneer in the study of effects of enrichment on the mammalian brain. Recent Video.
Richard Feynman, PhD (1918-1988): Nobel physicist who is also remembered for finding the cause of the Challenger disaster. (see the video)
Roger Guillimen, PhD (The Salk Institute): won the 1977 Nobel Prize in Medicine for "discoveries concerning the peptide hormone production of the brain."
Play: How It Shapes the Brain, Opens the Imagination, and Invigorates the Soul ,by Stuart Brown, MD with Christopher Vaughn
A Nation of Wimps: The High Cost of Invasive Parenting, by Hara Estroff Marano
The Gift of Play: Why Adult Women Stop Playing And How To Start Again, by Barbara Brannen
Exuberant Animal: The Power of Health, Play, and Joyfill Movement, by Frank Forenich
Spark: The Revolutionary New Science of Exercise and the Brain, by John J. Ratey
Send email to Dr. Campbell at brainsciencepodcast@gmail.com.
Episode 58 of the Brain Science Podcast is an interview with philosopher, Alva Noë, whose book, Out of Our Heads: Why You Are Not Your Brain, and Other Lessons from the Biology of Consciousness, argues persuasively that our minds are MORE than just our brains. He says that "the brain is necessary but not sufficient" to create the mind.
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Alva Noe (University of California, Berkeley).
Out of Our Heads: Why You Are Not Your Brain, and Other Lessons from the Biology of Consciousness, by Alva Noé.
Paul Bach-y-Rita: pioneering studies in sensory substitution using tactile stimuli to substitute for vision.
Held and Hein: experiments with cats showing that development of normal vision requires motor-sensory feedback.
Brain Mechanisms in Sensory Substitution by Paul Bach-y-Rita, 1972.
Bach-y-Rita, P "Tactile-Vision Substitution: past and future", International Journal of Neuroscience 19, nos. 1-4, 29-36, 1983.
Held, R and Hein, "Movement-produced stimulation in the development of visually guided behavior." Journal of Comparative and Physiological Psychology. 56(5), 872-876, 1963.
Held, R. "Plasticity in sensory-motor systems." Scientific American. 213(5) 84-91, 1965.
Special thanks to Diane Jacobs, Jenine John and Lori Wolfson for transcribing all the episodes of the Brain Science Podcast.
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Please send your feedback to brainsciencepodcast@gmail.com.
Episode 57 of the Brain Science Podcast is an interview with neuropsychologist, Dr. Chris Frith, author of Making up the Mind: How the Brain Creates Our Mental World. Our brain processes information about the world outside us (via our senses) in the same way that it processes information from within our bodies and from our own mental world. In this interview. Dr. Frith and I explore the implications from recent discoveries about how our brain generates our mental world.
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Chris Frith, PhD: University College London Wellcome Trust Center for Neuroimaging.
Necker cube: a visual illusion that shows that some visual processing can not be changed by top-down feedback.
PubMed: a public service of the US National Library of Medicine and the National Institutes of Health.
Bayes, T (1763). “An essay toward solving a problem in the doctrine of chance.” Philosophical Transactions of the Royal Society of London, 53, 470-418.
Blakemore, SJ, Wolpert DM, and Frith, CD (1990) Central Cancellation of self produced tickle sensation. Nature Neuroscience, 1(7), 635-640.
Botvinick, M and Cohen, J (1998) Rubber hands "feel" touch that the eyes see. Nature, 391(6669), 756.
Kilner, JM, Paulignan, Y, and Blakemore, SJ, (2003) An interference effect of observed biological movement on action.Current Biology, 13(6), 522-525.
Rizzolatti, G and Craighero, L (2004). The mirror-neuron system. Annual Review of Neuroscience, 27, 169-192.
Wicker, B, Keysers, C, Plaily,J, Royet, JP, Galese, V, and Rizzolatti, G (2003). Both of us disgusted in My insula: The common neural basis of seeing and feeling disgust.Neuron. 40(3), 655-664.
Wegner, D (2003). The Illusion of Conscious Will, MIT Press.
Wegner, DM, Fuller, VA and Sparrow, B. (2003) Clever hands: Uncontrolled intelligence in facilitated communication. Journal of Personal Social Psychology, 85(1), 5-19.
*These references are from Making up the Mind: How the Brain Creates Our Mental World by Chris Frith.
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Episode 56 of the Brain Science Podcast is an interview with neuroscientist, Eve Marder, PhD. Dr. Marder has spent 35 years studying the somatogastric ganglion of the lobster. In this interview we talk about how she got into neuroscience during its early days, her recent tenure as president of the Society for Neuroscience, and how some of her key discoveries have implications for studying more complex nervous systems.
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Gina Turrigiano (synaptic scaling).
Brain Awareness Week.
Wikipedia links: Eve Marder, central pattern generator.
The Practical Psychiatrist has chosen the Brain Science Podcast for its semi-annual Community Service Award in Mental Health.
Episode 55 of the Brain Science Podcast is an interview with highly respected philosopher Patricia Churchland. Churchland is the author of Neurophilosophy and Brain-Wise. She is currently on the faculty of the University of California at San Diego, and she was a featured speaker at the annual meeting of the Society for Neuroscience in 2008.
In this interview, we talked about neurophilosophy, which is an approach to philosophy of mind that gives high priority to incorporating the empiric findings of neuroscience. We also talk about the evolving relationship between philosophy and neuroscience. Churchland shares her enthusiasm for how the discoveries of neuroscience are changing the way we see ourselves as human beings. We also talked a little about the issues of reductionism that I first brought up in Episode 53.
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Brain-Wise: Studies in Neurophilosophy, by Patricia Smith Churchland.
Neurophilosophy: Toward a Unified Science of the Mind-Brain, by Patricia Smith Churchland.
Supersizing the Mind: Embodiment, Action, and Cognitive Extension, by Andy Clark.
Liars, Lovers, and Heroes: What the New Brain Science Reveals About How We Become Who We Are, by Steven R. Quartz andTerrence J. Sejnowski.
The Really Hard Problem: Meaning in a Material World, by Owen J. Flanagan.
Freedom Evolves, by Daniel C. Dennett.
Episode 5: Introduction to philosophy of mind and the question of consciousnes.
Episode 22: Interview with Christof Koch about consciousness.
Episode 53: Discussion of Did My Neurons Make Me Do It? a defense of free will.
Brain Science Podcast #54 is an interview with Dr. Michael Merzenich, one of the pioneers of neuroplasticity. We talk about how the success of the cochlear implant revealed unexpected plasticity in adult brains and about how brain plasticity can be tapped to improve a wide variety of problems including dyslexia, autism, damage from disease and injury. Healthy people of all ages can also tap the resource of brain plasticity to help maintain and improve their mental functions.
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New episodes of the Brain Science Podcast are always FREE. All episodes posted after January 1, 2013, are free. See the individual show notes for links the audio files.
Scientific Learning (Fast Forward™).
Send email feedback to Ginger Campbell, MD at brainsciencepodcast@gmail.com
Episode 53 of the Brain Science Podcast is a discussion of Did My Neurons Make Me Do It?: Philosophical and Neurobiological Perspectives on Moral Responsibility and Free Will, by Nancey Murphy and Warren S. Brown. This book challenges the widespread fear that neuroscience is revealing an explanation of the human mind that concludes that moral responsibility and free will are illusions created by our brains.
Instead, the authors argue that the problem is the assumption that a physicalistic/materialistic model of the mind must also be reductionist (a viewpoint that all causes are bottom-up). In this podcast I discuss their arguments against causal reductionism and for a dynamic systems model. We also discuss why we need to avoid brain-body dualism and recognize that our mind is more than just what our brain does. The key to preserving our intuitive sense of our selves as free agents capable of reason, moral responsibility, and free will is that the dynamic systems approach allows top-down causation, without resorting to any supernatural causes or breaking any of the know laws of the physical universe. This is a complex topic, but I present a concise overview of the book's key ideas.
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Books and Ideas #12 ("The Myth of Free Will")
Alice Juarrero, Dynamics in Action: Intentional Behavior as a Complex System.
Terence Deacon, The Symbolic Species: The Co-Evolution of Language and the Brain.
Terrence Deacon, "Three Levels of Emergent PHenomena," in Nancy Murphy and William R. Stoeger (eds.) Evolution, and Emergence: Systems, Organisms, Persons (OUP 2007) ch 4.
Alwyn Scott, "The Development of Nonlinear Science", Revista del Nuovo Cimento, 27/10-11 (2004) 1-115.
Roger W. Sperry, "Psychology's Mentalist Paradigm and the Religion/Science Tension," American Psychologist, 43/8 (1988), 607-13.
Donald T. Campbell, "'Downward Causation' in Hierarchically Organized Biological Systems." in F. J. Ayala and T. Dobzhansky (eds.) Studies in the Philosophy of Biology 179-186.
Steven Johnson, Emergence: The Connected Lives of Ants, Brains, Cities, and Software
Robert Van Gulick, "Who's in Charge Here? And Whose Doing All the Work?"In Heil and Mele (eds.) Mental Causation, 233-56.
George Lakoff and Mark Johnson, Philosophy in the Flesh: The Embodied Mind and Its Challenge to Western Thought.
Ludwig Wiggenstein, Philosophical Investigations.
Antonio Damasio: Descartes' Error: Emotion, Reason, and the Human Brain.
Arthur Glenberg: interviewed in Episode 36.
Rolf Pfeifer: interviewed in Episode 25.
Leslie Brothers, Friday's Footprint: How Society Shapes the Human Mind.
Raymond Gibbs, Embodiment and Cognitive Science.
Andy Clark, Being There: Putting Brain, Body, and World Together Again.
Gerald M.Edelmanand Guilo Tononi, A Universe of Consciousness: How Matter Becomes Imagination.
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Send email feedback to Ginger Campbell, MD at brainsciencepodcast@gmail.com
Brain Science Podcast #52 is our Second Annual Review Episode. We review some of the highlights from 2008. I also discuss the various other on-line resources that I have created for listeners. Then we look ahead to what I have planned for 2009. This episode is aimed at all listeners, including those who are new to the show.
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Early in the year (#30) I discussed language evolution. My criticism of Noam Chomsky's claim that human language results from a Universal Grammar Module generated quite a bit of discussion. My main purpose was to emphasize that current neuroscience does not support this hypothesis. I discussed Chomsky's work in follow-up interviews with Dr. Michael Arbib (BSP 39) and linguist Alice Gaby (BSP 41).
It is my impression that, at least to some extent, this debate comes back to the age-old "nature versus nurture" controversy, which I discussed more explicitly way back in Episode 4. The evidence seems to be mounting that human intelligence is a product of both processes.
There is no doubt that the capacity for language is inherited, but brain plasticity appears to be equally important. One piece of evidence for this is that the changes in the brain that occur when people learn to read are different between languages like English and German and those like Chinese and Japanese. (Episode 24 and Episode 29)
We had 17 guests on the Brain Science Podcast in 2008, so I can't mention them all here.
John Ratey, MD: In Episode 33 we talked about exercise and the brain, while in Episode 45 we talked about ADD.
Robert Burton, MD: In Episode 43 talked about the implications of the discovery that our sense of knowing (feeling certain) is generated by parts of the brain that are outside our conscious control!
John Medina, PhD: In Episode 37 we considered the practical implications of neuroscience, such as the importance of getting enough sleep and why true multi-tasking is actually impossible.
Dr. Brenda Milner: In Episode 49 this pioneering neuroscientist shared highlights from her long career.
Another highlight was our first live podcast, which was recorded at Dragon*Con in Atlanta, Georgia on August 31.
In the fall I returned to the subject of evolution with a three part series on the evolution of the brain.
Episode 47, Episode 48, and Episode 51.
Episode 51 is an outstanding interview with Dr. Seth Grant in which we discuss the surprising discovery that synapse complexity seems to have evolved BEFORE larger more complex brains.
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Episode 51 of the Brain Science Podcast is an interview with Dr. Seth Grant from Cambridge University, UK. Dr. Grant's work focuses on the proteins that make up the receptors within synapses. (Synapses are the key structures by which neurons send and receive signals.) By comparing the proteins that are present in the synapses in different species, Dr. Grant has come to some surprising conclusions about the evolution of the synapse and the evolution of the brain.
In this interview, Dr. Grant explains how his research team has uncovered the identity ofsynapse proteins in a variety of species including yeast, fruit flies, and mice. Our discussion is centered on the paper he published in Nature Neuroscience in June 2008. Dr. Grant's team has made several surprising discoveries. First, he has discovered that some proteins associated with neuron signaling are actually found in primitive unicellular organisms like yeast. He has also discovered that the protein structure of the synapse becomes more complex as one moves from invertebrates like fruit flies to vertebrates like mice, but that most of the complexity seems to have arisen early on in vertebrates.
According to Dr. Grant:
The origins of the brain appear to be in a protosynapse, or ancient set of proteins found in unicellular animals; and when unicellular animals evolved into metazoans, or multicellular animals, their protosynaptic architecture was co-opted and embelished by the addition of new proteins onto that ancient protosynaptic set; and that set of new molecules was inserted into the junctions of the first neurons, or the synapse between the first neurons in simple invertebrate animals. When invertebrates evolved into vertebrates, around a billion years ago, there was a further addition, or enhancement of the number of these synaptic molecules, and that has been conserved throughout vertebrate evolution, where they have much larger numbers of synaptic molecules. The large complex synapses evolved before large anatomically complex brains.
The discovery that there are significant differences between the synapses in vertebrates and non-vertebrates is significant, because it has long been assumed that synapses were essentially identical between species, and that brain and behavioral complexity was based on having more neurons and bigger brains. Instead, Dr. Grant proposes an alternative hypothesis:
The first part of the brain to ever evolve was the protosynapse. In other words, synapses came first.
When this big synapse evolved, what the vertebrate brain then did, as it grew bigger and evolved afterwards; it exploited the new proteins that had evolved into making new types of neurons in new types of regions of the brain. In other words, we would like to put forward the view that the synapse evolution has allowed brain specialization, regionalization, to occur.
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"Proteomic analysis of NMDA receptor-adhesion protein signaling complexes."Nature Neuroscience 2000 Jul;3(7):661-9. Husi H, Ward MA, Choudhary JS, Blackstock WP, Grant SG.
"Synapse proteomics of multiprotein complexes: en route from genes to nervous system diseases." Human Molecular Genetics 2005 Oct 15;14 Spec No. 2:R225-34. Grant SG, Marshall MC, Page KL, Cumiskey MA, Armstrong JD.
“The proteomes of neurotransmitter receptor complexes form modular networks with distributed functionality underlying plasticity and behaviour.” Molecular Systems Biology 2: 2006.0023. Pocklington AJ, Cumiskey M, Armstrong JD, Grant SG.
"Evolutionary expansion and anatomical specialization of synapse proteome complexity." Nature Neuroscience 2008. Emes RD, Pocklington AJ, Anderson CN, Bayes A, Collins MO, Vickers CA, Croning MD, Malik BR, Choudhary JS, Armstrong JD, Grant SG
Press Release from Genes to Cognition on Brain Evolution. June 2008
New York Times article by Nicholas Wade (6/10/08).
"Synapse Proteomics," by Diane Jacobs. June 2008.
"Synapse Proteomics & Brain Evolution." Neurophilosophy blog. June 2008
"Increasing complexity of nerve synapses during evolution." Deric Bownds. June 2008
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Episode 50 of the Brain Science Podcast is a change of pace from our usual format. In this episode I share a few highlights from this year's Neuroscience 2008, the annual meeting of the Society for Neuroscience, which just concluded in Washington, DC.
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Society for Neuroscience Public Outreach Efforts:
Neuroscience Core Concepts: key ideas that everyone should know.
Eve Marder (Brandeis University)-current president of SfN.
Tom Carew (UC-Irvine)-incoming president of SfN.
Michael Bate (Cambridge University): his talk about the study of the development of movement in fruit flies is featured in this episode.
The development of motor coordination in Drosophila embryos by Sarah Crisp, Jan Felix Evers, André Fiala and Michael Bate; Development 135, 3707-3717 (2008).
Books and Ideas #23: Interview with Nobel physicist, Dr. Frank Wilczek.
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Episode 48 of the Brain Science Podcast is an interview with Gary Lynch, PhD, co-author (with Richard Granger) of Big Brain: The Origins and Future of Human Intelligence. Dr. Lynch has spent decades studying memory at the level of the synapse. His work with computer simulations based on how the brain really works led him to a fascination with the question of how our brains got so large. Are humans smart because we have big brains or because are brains are different?
Dr. Lynch argues that the unique features of the human brain are a natural result of increased brain size. He also argues against the conventional view that increasing brain size resulted from selection pressures during the millions of years of primate evolution that proceeded the emergence of homo sapiens. We talk about the evidence supporting this radical position during the interview.
We also talk about another radical theory that Dr. Lynch has proposed, which is the idea that the olfactory cortex formed the template for the evolution of the cortex in mammals and primates. This intriguing theory brings a new perspective to the fact that the olfactory system has unique access to important brain systems including the frontal lobes, the amygdala (which is involve in emotion), and the hippocampus (which is essential to long-term memory.
In addition to discussing the evidence that led him to his controversial theories, Dr. Lynch discusses the challenges facing scientists interested in pursuing research questions about brain evolution.
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New episodes of the Brain Science Podcast are always FREE. All episodes posted after January 1, 2013, are free. See the individual show notes for links the audio files.
Big Brain: The Origins and Future of Human Intelligence, by Gary Lynch and Richard Granger.
Gary Lynch, PhD: Department of Psychiatry, University of California-Irvine.
Principles of Brain Evolution, by Georg F. Striedter: was discussed in Episode 47.
The figure below is used with the permission of the author and the artist (Cheryl Cotman).
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