Remembering Jaak Panksepp (BS 134)
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In Brain Science 134 we remember Dr. Jaak Panksepp, pioneer of Affective Neuroscience.
A completely new episode will be out near the end of July.
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The Origin of Emotions with Jaak Panksepp (BSP 91)
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Dr. Jaak Panksepp
In his new book, The Archaeology of Mind: Neuroevolutionary Origins of Human Emotions, Jaak Panksepp set out to make his life's work more accessible to a general audience. To be honest, reading this book requires a significant commitment, but I think he does a wonderful job of updating his classic textbook, Affective Neuroscience. Anyone who is interested in this field will definitely want this book as a reference.
The other strength of Archeology of Mind is its evolutionary approach. The primary emotional processes that Panksepp has spent his career studying have their origins in the ancient parts of the brain that are shared by all mammals. This contradicts longstanding assumptions in neuroscience, but it has important implications for both humans and other animals.
In Episode 91 of the Brain Science Podcast, Dr. Panksepp and I talked about some of the new information contained in Archaeology of Mind, with a particular focus on FEAR, which, contrary to what many researchers claim, does NOT begin in the amygdala, but begins much lower. We do talk briefly about the experimental evidence, but this was covered in more detail during Dr. Panksepp's previous appearance on the Brain Science Podcast in BSP 65.
How to get this episode:
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New episodes of the Brain Science Podcast are always FREE. All episodes posted after January 1, 2013 are FREE. Please see individual show notes for links to audio files and transcripts.
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References:
The Archaeology of Mind: Neuroevolutionary Origins of Human Emotions, by Jaak Panksepp and Lucy Biven.
Affective Neuroscience: The Foundations of Human and Animal Emotions, by Jaak Panksepp.
Please see the episode transcript for additional links and references.
Related Episodes:
BSP 32: An introduction to brain anatomy.
BSP 47: A review of brain evolution.
BSP 65: Previous interview with Jaak Panksepp (click here for Premium version).
BSP 89: Interview with Evan Thompson, author of Mind in Life: Biology, Phenomenology, and the Sciences of Mind.
BSP 90: Review of Self Comes to Mind: Constructing the Conscious Brain, by Antonio Damasio.
Announcements:
The earliest episodes of the Brain Science Podcast are now disappearing from iTunes but they remain freely available here. They are also available within the Brain Science Podcast app for mobile devices. By the way, the mobile app has been updated, and I need users to post new reviews.
Don't forget to get your copy of my eBook, Are You Sure? The Unconscious Origins of Certainty, from Amazon.com. You can also buy the PDF version HERE.
The Brain Science Podcast is supported by listener Donations. It also relies on your word of mouth, so don't forget to share it with others.
Next month's Brain Science Podcast will be our annual review episode. Meanwhile don't forget to check out my other podcast, Books and Ideas. The most recent episode is an interview with Emily Reese from Minnesota Classical Radio.
Join the Brain Science Podcast Fan Page on Facebook, Google+, and share your thoughts in our Discussion Forum on Goodreads. Of course, you can also send me email at gincampbell at mac dot com.
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Affective Neuroscience with Jaak Panksepp (BSP 65)
/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.
How to get this episode:
Premium Subscribers now have unlimited access to all old episodes and transcripts.
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.
Listen in your Favorite Audio app: Audible, Amazon music, Pandora, Spotify, YouTube and many more.
References:
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.
Scientists Mentioned in this Episode:
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.
Does the Limbic System Exist?
/A few days ago I received an email from a listener asking me: Does the Limbic System Exist?
The term limbic system was made popular in the late 1970's by Carl Sagan's Pulitzer Prize winning book,The Dragons of Eden; but in recent years, many neuroscientists have come to regard the term as misleading, or worse. In this essay I will provide a brief historical overview and discuss the scientific objections to the term limbic system.
History
The highly regarded textbook, Neuroscience: Exploring the Brain (3rd edition, edited by Bear, et. al.) provides a brief overview of the history of the "limbic system concept." It notes that the term "limbic lobe" was introduced back in 1878 by the French neurologist Paul Broca. Broca was describing the area of the medial brain that surrounds the brain stem and corpus callosum. By the 1930's, the evidence suggested that many of the structures in this region were involved in emotion. One expression of this hypothesis was the so-called "Papez circuit" (named after neurologist James Papez). In 1952, James Maclean introduced the term "limbic system," and in 1973, he proposed his famous "triune theory" of brain evolution, which was later popularized in The Dragons of Eden.
In 1998, Jaak Panksepp made extensive use of the "triune brain" model in his groundbreaking book, Affective Neuroscience: The Foundations of Human and Animal Emotions. Panksepp emphasized that primates (including humans) share similar emotional circuitry. This principle has inspired much valuable research into the role of emotion in our mental lives, so that we now recognize that proper functioning of our emotional circuitry is essential to our health.
Thus, the term "limbic system" actually includes two main ideas: the idea that there is a discrete part of the brain that generates mammalian emotions, and the idea that this area evolved as a separate area only in mammals. In the triune theory of brain evolution, primates (including humans) are seen as having inherited three successive brain structures: the reptilian brain, the limbic system, and the neocortex.
Objections
In Neuroscience, the authors observe that, although the evidence certainly supports the the fact that some of the structures in this region are involved in emotion, the Papez circuit is no longer seen as an accurate description. More importantly, they state "The critical point seems to be conceptual, concerning the definition of an emotional system. Given the diversity of emotions we experience, there is no compelling reason to think that only one system--rather than several--is involved. Conversely, solid evidence indicates that some structures involved in emotions are also involved in other functions..." (page 571). Thus, they question applying the term limbic system to the emotional system, because it can not accurately be described as a discrete system of components, such as one would describe the visual system.
The second objection to the term limbic system is that it represents a model of primate brain evolution that has largely been discarded. In Principles of Brain Evolution, Georg Striedter observed that Maclean's "triune brain" theory was "clearly derived" from the work of Ludwig Edinger (1908), who observed that that the forebrain of various vertebrates seemed to differ dramatically, while the lower brain structures appeared to be highly conserved. The key underlying assumption of the "triune brain" theory is that major brain areas were added on as mammals evolved, but this essentially 19th century viewpoint has been supplanted by modern work in neuroanatomy.
Striedter explains how the idea that "brains evolved by the sequential addition of parts was toppled." He concludes "By the 1990's, most comparative neuroanatomists believed that all vertebrate brains are built according to a common plan that varies only in its details." His textbook describes the evidence in support of this "conservative revolution" in great detail. (Streitder, page 35) Note: Striedter's book was discussed in Episode 47.
Conclusions
The term "limbic system" is clearly falling into disuse among neuroscientists, but seems destined to live on the popular imagination. The "triune brain" popularized by Sagan and Maclean has an undeniable appeal, partly because it presents a clear and understandable model that corresponds to our intuitive sense of our place in the world. The problem is that it represents an oversimplified, and possibly misleading picture. Our brains are much more like those of other mammals than this model suggests. Also, the emotional system is much more complex and deeply integrated into the other systems of the brain.
Scientists have a strong preference for precise language. Thus, as described above, the limbic system does not exist, because there is no one clearly defined emotional system in the human brain. Many neuroscientists (especially those involved in comparative neuroanatomy) also avoid the term because of its association with an outmoded view of vertebrate brain evolution.
The term limbic system was made popular in the late 1970's by Carl Sagan's Pulitzer Prize winning book,The Dragons of Eden; but in recent years, many neuroscientists have come to regard the term as misleading, or worse. In this essay I will provide a brief historical overview and discuss the scientific objections to the term limbic system.
History
The highly regarded textbook, Neuroscience: Exploring the Brain (3rd edition, edited by Bear, et. al.) provides a brief overview of the history of the "limbic system concept." It notes that the term "limbic lobe" was introduced back in 1878 by the French neurologist Paul Broca. Broca was describing the area of the medial brain that surrounds the brain stem and corpus callosum. By the 1930's, the evidence suggested that many of the structures in this region were involved in emotion. One expression of this hypothesis was the so-called "Papez circuit" (named after neurologist James Papez). In 1952, James Maclean introduced the term "limbic system," and in 1973, he proposed his famous "triune theory" of brain evolution, which was later popularized in The Dragons of Eden.
In 1998, Jaak Panksepp made extensive use of the "triune brain" model in his groundbreaking book, Affective Neuroscience: The Foundations of Human and Animal Emotions. Panksepp emphasized that primates (including humans) share similar emotional circuitry. This principle has inspired much valuable research into the role of emotion in our mental lives, so that we now recognize that proper functioning of our emotional circuitry is essential to our health.
Thus, the term "limbic system" actually includes two main ideas: the idea that there is a discrete part of the brain that generates mammalian emotions, and the idea that this area evolved as a separate area only in mammals. In the triune theory of brain evolution, primates (including humans) are seen as having inherited three successive brain structures: the reptilian brain, the limbic system, and the neocortex.
Objections
In Neuroscience, the authors observe that, although the evidence certainly supports the the fact that some of the structures in this region are involved in emotion, the Papez circuit is no longer seen as an accurate description. More importantly, they state "The critical point seems to be conceptual, concerning the definition of an emotional system. Given the diversity of emotions we experience, there is no compelling reason to think that only one system--rather than several--is involved. Conversely, solid evidence indicates that some structures involved in emotions are also involved in other functions..." (page 571). Thus, they question applying the term limbic system to the emotional system, because it can not accurately be described as a discrete system of components, such as one would describe the visual system.
The second objection to the term limbic system is that it represents a model of primate brain evolution that has largely been discarded. In Principles of Brain Evolution, Georg Striedter observed that Maclean's "triune brain" theory was "clearly derived" from the work of Ludwig Edinger (1908), who observed that that the forebrain of various vertebrates seemed to differ dramatically, while the lower brain structures appeared to be highly conserved. The key underlying assumption of the "triune brain" theory is that major brain areas were added on as mammals evolved, but this essentially 19th century viewpoint has been supplanted by modern work in neuroanatomy.
Striedter explains how the idea that "brains evolved by the sequential addition of parts was toppled." He concludes "By the 1990's, most comparative neuroanatomists believed that all vertebrate brains are built according to a common plan that varies only in its details." His textbook describes the evidence in support of this "conservative revolution" in great detail. (Streitder, page 35) Note: Striedter's book was discussed in Episode 47.
Conclusions
The term "limbic system" is clearly falling into disuse among neuroscientists, but seems destined to live on the popular imagination. The "triune brain" popularized by Sagan and Maclean has an undeniable appeal, partly because it presents a clear and understandable model that corresponds to our intuitive sense of our place in the world. The problem is that it represents an oversimplified, and possibly misleading picture. Our brains are much more like those of other mammals than this model suggests. Also, the emotional system is much more complex and deeply integrated into the other systems of the brain.
Scientists have a strong preference for precise language. Thus, as described above, the limbic system does not exist, because there is no one clearly defined emotional system in the human brain. Many neuroscientists (especially those involved in comparative neuroanatomy) also avoid the term because of its association with an outmoded view of vertebrate brain evolution.
References
- The Dragons of Eden: Speculations on the Evolution of Human Intelligence, by Carl Sagan.
- Neuroscience: Exploring the Brain, by Mark F Bear, Barry Connors, Michael Paradiso; page 571.
- Principles of Brain Evolution, by Georg F. Striedter; page 35.
