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06/14/10(Mon)06:10:14 No.9514222   >>9514190
More
proof that you don't know what you're talking about.
"In the
early 1990s, Tim Pons, at the National Institutes of Health (NIH),
showed that the brain can reorganize if sensory input is cut off (Pons
et al. 1991). Hearing about these results, V. S. Ramachandran realized
that phantom limb sensations could be due to "crosswiring" in the
somatosensory cortex, which is located in the postcentral gyrus
(Ramachandran & Blakeslee 1998; Ramachandran & Hirstein 1998),
and which receives input from the limbs and body. Input from the left
side of the body goes to the right hemisphere and vice versa. The input
from extremities comes into the somatosensory cortex in an ordered way,
the representation of which is referred to as the somatosensory
homonculus. Input from the hand is located next to the input from the
arm, input from the foot is located next to input from the hand, and so
on. One oddity is input from the face is located next to input from the
hand."
also to touch on fetal genital differentiation:
"By
7 weeks, a fetus has a genital tubercle, urogenital groove and sinus,
and labioscrotal folds. In females, without excess androgens, these
become the clitoris, urethra and vagina, and labia.
Males become
externally distinct between 8 and 12 weeks, as androgens enlarge the
phallus and cause the urogenital groove and sinus to fuse in the
midline, producing an unambiguous penis with a phallic urethra, and a
thinned, rugated scrotum."
Youre a pretty bad bio major to know
less about the topic than a freaking art major... |
