physiology of the limbic system

Question 1

stimulation of lateral hypothalamus

Answer 1

thirst, eating, rage & fighting

Question 2

stimulation of ventromedial nucleus

Answer 2

satiety, decreased eating & tranquility

Question 3

stimulation of periventricular nuclei or stimulation of the central gray area of mesencephalon (continuous with hypothalamus)

Answer 3

fear & punishment rxns

Question 4

stimulation of most anterior & most posterior hypothalamus

Answer 4

sexual drives

Question 5

bilateral lesions in lateral hypothalamus

Answer 5

decreased drinking & eating –> starve to death, extreme passivity

Question 6

bilateral lesions of ventromedial areas of hypothalamus

Answer 6

excessive drinking & eating

hyperactivity & frequent bouts of extreme rage upon slightest provocation

Question 7

where are the reward centers located?

recall they send inhibitory signals to repress rage

Answer 7

lateral and ventromedial nuclei of the hypothalamus

Question 8

where are the punishment centers located?

Answer 8

central gray area around aqueduct of sylvius extending up into the hypothalamus & thalamus
amygdala
hippocampus

Question 9

what happens if there is an ablation to the anterior temporal cortex & amygdala?

Answer 9

kluver bucy syndrome (fits of rage)

Question 10

what happens if there is an ablation to the posterior orbital frontal cortex?

Answer 10

insomnia & motor restlessness

Question 11

what happens if there is an ablation to the anterior cingulate gyri & subcallosal gyri?

Answer 11

viscous behavior