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Tero Toivanen

The Mirror Neuron Revolution: Explaining What Makes Humans Social: Scientific American - 0 views

  • In recent years, Iacoboni has shown that mirror neurons may be an important element of social cognition and that defects in the mirror neuron system may underlie a variety of mental disorders, such as autism.
  • Mirror neurons are the only brain cells we know of that seem specialized to code the actions of other people and also our own actions. They are obviously essential brain cells for social interactions. Without them, we would likely be blind to the actions, intentions and emotions of other people.
  • The way mirror neurons likely let us understand others is by providing some kind of inner imitation of the actions of other people, which in turn leads us to “simulate” the intentions and emotions associated with those actions. When I see you smiling, my mirror neurons for smiling fire up, too, initiating a cascade of neural activity that evokes the feeling we typically associate with a smile.
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  • In 2006 your lab published a paper in Nature Neuroscience linking a mirror neuron dysfunction to autism. How might reduced mirror neuron activity explain the symptoms of autism?
  • Reduced mirror neuron activity obviously weakens the ability of these patients to experience immediately and effortlessly what other people are experiencing, thus making social interactions particularly difficult for these patients. Patients with autism have also often motor problems and language problems. It turns out that a deficit in mirror neurons can in principle explain also these other major symptoms. The motor deficits in autism can be easily explained because mirror neurons are just special types of premotor neurons, brain cells essential for planning and selecting actions. It has been also hypothesized that mirror neurons may be important in language evolution and language acquisition.
  • Thus, a deficit in mirror neurons can in principle account for three major symptoms of autism, the social, motor and language problems.
  • There is convincing behavioral evidence linking media violence with imitative violence. Mirror neurons provide a plausible neurobiological mechanism that explains why being exposed to media violence leads to imitative violence.
  • I think there are two key points to keep in mind. The first one is the one we started with: mirror neurons are brain cells specialized for actions. They are obviously critical cells for social interactions but they can’t explain non-social cognition. The second point to keep in mind is that every brain cell and every neural system does not operate in a vacuum. Everything in the brain is interconnected, so that the activity of each cell reflects the dynamic interactions with other brain cells and other neural systems.
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    In recent years, Marco Iacoboni, a neuroscientist at the University of California at Los Angeles, has shown that mirror neurons may be an important element of social cognition and that defects in the mirror neuron system may underlie a variety of mental disorders, such as autism.
Tero Toivanen

Inside the Mind of a Savant: Scientific American - 0 views

  • Theory guides us in one respect. Kim’s brain shows abnormalities in the left hemisphere, a pattern found in many savants. What is more, left hemisphere damage has been invoked as an explanation of why males are much more likely than females to display not only savantism but also dyslexia, stuttering, delayed speech, and autism.
  • The proposed mechanism has two parts: male fetuses have a higher level of circulating testosterone, which can be toxic to developing brain tissue; and the left hemisphere develops more slowly than the right and therefore remains vulnerable for a longer period. Also supporting the role of left hemisphere damage are the many reported cases of “acquired savant syndrome,” in which older children and adults suddenly develop savant skills after damage to the left hemisphere.
  • although autism is more commonly linked with savantism than is any other single disorder, only about half of all savants are autistic.
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    Article about Kim Peek and mind of savant.
Tero Toivanen

Autistic Aphorisms: Enhanced Perception in Savant Syndrome - 0 views

  • Mottron team did not shy away from suggesting that the features of savant syndrome could serve as an entryway into understanding all forms of autistic perception and cognition, savant like or not. This effectively removed savant syndrome from being the freak sideshow of autism and elevated it to the status of being a key element for understanding the condition.
  • it is orientation towards structure and pattern that determines the essential characteristics of autistic perception and cognition.
  • Not weak central coherence. Not damaged executive functioning. Not a missing theory of mind. Not a masculinized brain. Orientation to pattern and structure is the key to understanding autistic perception—an approach that is productive towards autistic interests and abilities, not destructive, as is the case for nearly every other competing theory. The Mottron team's emphasis on pattern-oriented perception in autistic individuals is a helpful step forward in understanding autistic individuals as they truly are.
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  • all the success stories related inside the pages of EPSS are accompanied by fortuitous exposure to various forms of structured material, clearly marking out the most promising path for autistic development and growth.
  • And of course these discussions fly in the face of the current clamor for early intervention in autism, where it would seem the goal is always to yank the autistic child away as early as possible from his or her preferred method of engaging the world, and substitute instead an intense bombardment of socially based indoctrination, hoping to turn the child around while there is still time for the “malleable” brain to be re-molded.
  • In my opinion, it is no mere coincidence that the very same elements that stand at the core of the Mottron team's affirmative description of autistic perception and cognition are also the very same elements that stand at the core of humanity’s sudden departure off the savannah and leap into the modern world.
  • Admittedly, a thorough discussion of such a topic would be much too large for inclusion in an academic research paper such as EPSS, but the fact that the Mottron team does not mention, or even hint at, the connection between the features of autistic perception and the features of human cognitive history leave it unclear whether the team has ever considered such a connection.
  • At this point in time, the Mottron team seems to be the only autism research team heading in a positive and enlightening direction—a direction that is constructive for autistic individuals everywhere—and I look forward to all their future contributions.
Graeme Wadlow

What aspects of autism predispose to talent? - 0 views

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    Philosophical Transactions B May 2009
Graeme Wadlow

Following Gaze: Gaze-Following Behavior as a Window into Social Cognition - 0 views

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    Following Gaze: Gaze-Following Behavior as a Window into Social Cognition
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