The November Scientific American (not yet available on line) has an article on "The Neurobiology of the Self", which describes some of the work being done using functional brain scans (PET scans, fMRI's) to elucidate the neuroanatomy and neurophysiology of consciousness and the determinants of the self-concept. Interestingly, and not surprisingly, there is much in the early evidence that supports a Psychoanalytic theory of the development of the self. I discussed the Psychoanalytic point of view in an earlier post, Narcissism, Malignant Narcissism, and Paranoia: Part I:
Early in life we take the various images we have developed of ourselves (our self representations, in Psychoanalytic terms) and merge them to form a relatively stable, and usually only moderately distorted, sense of who we are and how we fit into the world around us. If we had the good fortune to be raised by a "good enough" mother (D.W. Winnicott, again) part of our core self representation will be of the adored child, the "apple of the mother's eye" as Kohut once so elegantly put it. Many other self representations are added through the years, some positive, some negative, until we form a relatively stable, relatively realistic, core sense of who we are and what kind of person we want to be. One of Kohut's contributions was to show how the child's nascent sense of himself developed primarily in relation to the mother's sense of the child and how failures of attunement by the mother left the child at high risk for narcissistic disorders. In other words, how a mother looks at her child, especially her unconscious wishes and fears, are the most important influences on the child's developing self concept. A mother who experiences her two year old as demanding or defiant or a brat, rather than appreciating (not without some difficulty; 2 year olds have their reputation for a reason) her child's need for and push for independence, will one day discover they have a poorly behaved, impulse ridden, needy child on her hands.
Typically development is a rather complicated journey, and I do go into this in more detail in the rest of the post and several following posts, but the essential idea that multiple self-representations (ie, different images one has and develops about oneself) must be integrated to form a coherent and consistent sense of oneself has been bolstered by the finding of areas of the brain that appear to do just such integration.
Debra A. Gusnard of Washington University describes one such area, the medial prefrontal cortex, an area located in the cleft between the hemispheres of the brain , directly behind the eyes (where most people imagine their "self" to reside.) The medial prefrontal cortex may act as an integrating and synthesizing structure. Of note, this area of the brain has a high concentration of neurons called spindle cells, which are thought to be very involved in information processing. [Recent work suggesting the computational ability of single neurons may be more robust than we have recognized will need to be factored into the mix as time goes by.]
It is worth noting that there is a significant area of overlap between such a hypothesized brain structure and the psychoanalytic concepts of "object constancy", "ego structures" and "ego boundaries"; these concepts are relevant to determining the boundaries between self and not-self (or self and object.)
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