[PHYSIO] LIMBIC SYSTEM & HYPOTHALAMUS Flashcards
papez circuit includes
HE MAN ATE CAT
hippocampus
Mamillary body
anterior thalamic nuclei
cingulate gyrus
function of limbic system (7)
1-olfaction
2-control of feeding & appetite
3-maternal & sexual behavior
4- stimulation of autonomic response
5-control of emotions
6-memory
7-motivation
piriform cortex is responsible for
perception & discrimination of olfactory sensation
olfactory cortex consists of
piriform cortex
amygdala
entorhinal cortex
neocortex is responsible for
conscious discrimination of odor
amgydala is responsible for
emotional responses to olfactory stimuli
the neocortex is responsible for
conscious discrimination of odor
the entorhinal cortex is responsible for
olfactory memories
lesions of amydgala lead to
hyperphagia
amniophagia
define hyperphagia
increased eating
define amniophagia
indiscriminative ingestion of all kinds of food
sexual behavior and function are controlled by
limbic system + hypothalamus
sexual behavior & function are modified by
prefrontal cortex
social factors
psychic factors
expression of emotions by limbic system & hypothalamus include
somatic motor responses
autonomic responses
endocrine responses
rage & aggression are produced by stimulation of
areas of amygdala + lateral nucleus
fear is produced by the stimulation of
areas of amygdala + periventricular nuclei
placidity is produced by stimulation of
ventromedial nucleus
site of memory incoding & consolidation
hippocampus
bilateral lesion of hippocampus leads to
anterograde amnesia
define motivation
force that activates/inhibits certain behavior to achieve certain goal
reward system centers are located in
lateral & ventromedial nuclei of hypothalamus
2ry reward centers are located in
septum
amygdala
certain areas of basal ganglia & thalamus
main neuroT of reward system
Dopamine
other neuroT of reward system
NE & 5HT
stimulation of reward system produces
pleasure & satisfaction
association between reward system & drug abuse
drugs cause addiction by increasing dopaminergic activity of reward system
punishment system main centers are in
periventricular nuclei & periaqueductal gray area of hypothalamus
2ry punishment system centers are in
amygdala + hippocampus
main neuroT of punishment system
Ach
stimulation of punishment system produces
displeasure & fear
