From Tom Bourbon [931101.1053]
To: Avery, Bill, other CSG-Lers interested in depression
From: David Goldstein
Subject: Depression
Date: 10/30/93
David, your post deserved more thorough treatment than I gave in my brief
caveat: Tom Bourbon [931101.0948].
1. What is "it"? From the viewpoint of neuroscience, it is the
result of the right hemisphere, especially the frontal lobes,
being overexcited and/or the left hemisphere being underexcited.
When there is damage to the right hemisphere, elation occurs.
When there is damage to the left hemisphere, depression results.
If this is true, a bipolar or manic/depressive disorder results
from the sequencing of left and right hemisphere dysfunctioning.
For information that either refutes, or adds qualifiers to, dramatic claims
of cortical specializations for emotion, and of hemispheric asymmetry in the
genesis of emotion, I recommend the following two sources:
Sally P. Springer & Georg Deutsch (any one of four editions), _Left brain,
right brain_. New York: W. H. Freeman and Co.
See especially their sections on topics such as: psychiatric illness
and asymmetry; emotion; clinical data; neuropsychological disorders.
Andrew C. Papanicolaou (1989). _Emotion: A reconsidration of the somatic
theory_. New York: Gordon and Breach.
See especially his chapter six, the following sections: 3. Brain
stimulation and evoked affective states; 4. Other evidence of the
brain's efficiency to engender emotion.
The message in both of those sources is that most people have gone far
beyond the data with their assertions (a) that *any* part of the brain can
be credited with specialization for producing emotions and, following from
that point, (b) that either hemisphere is specialized for producing one
kind or quality of emotion more than any other. In many cases, the data are
not there to support the claims; in other cases, the data were there at
least once, but they cannot be replicated; in others, there are data but
they do not support the dramatic claims. Bill Powers (931031.0750 MST) was
on the right track with the questions he put to you about the claims in your
post, David. (Not that *you* originated the claims; you merely summarized a
very common assertion from the literature on the "neuroscience" of emotion.)
This has been a nice "thread," David.
Until later,
Tom Bourbon
Department of Neurosurgry
University of Texas Medical School-Houston Phone: 713-792-5760
6431 Fannin, Suite 7.138 Fax: 713-794-5084
Houston, TX 77030 USA tbourbon@heart.med.uth.tmc.edu