Petit mal seizure - electrical activity burst freezes one’s action for a
while
Grand mal seizure - electrical surges in one hemisphere passes to another,
and then back and forth to form a feedback loop, literally short
circuits the brain. Motor cortex is
stimulated randomly, hence convulsions.
Contra-Lateralization
What do you see? (Left brain answers) Ring. But key would be grabbed (right
brain acts).
Presenting a sexually evoking picture to the right brain → patients blush →
“Why do you blush?” → (Left brain answers) “I just thought of an off-color
joke.”
Looks like left brain notices the blush, and made a theory around it to
explain. (The activation-synthesis hypothesis of dream?)
One eye for danger, the other for food/sexual objects.
Left-Handedness
12% in women, 8% in men.
Right brain for big picture, left for details.
Left-handers
Pay more attention to the left
Are less lateralized
Have denser corpus callosum
6 months lower life expectancy
Genetic hypothesis
Two genes controlling handedness.
Handedness gene, and change gene (identical twins can have different
handedness)
