Limbic System Flashcards
limbic system functions in …
emotion, motivation, memory, learning. it also has neuroendocrine functions and autonomic activities
inputs into the hippocampus
septal nuclei, amygdyla, hypothalamus, cingulate cortex, and cortex (frontal,temporal lobe)
what are the outputs to the hippocampus
cingulate cortex, anterior thalamus, stria terminalis, ventromedial nucleus, amygdala, mamillary body, cortex (entorhinal, tempora), septal nuclei, nucleus accumbens, medial frontal cortex
anterograde amnesia
injury to the hippocampus results in loss of short term memory. The patients cannot remember anything that occured longer than a few minunutes before and memories in the distant past and the intelligence remain intact
alzheimer’s disease
intracellular neurofibrillary tangles and extracellular amyloid deposits are the hallmark, subiculum, entorhinal crotex are the first sites where abnormlaities will appear
inputs to the amygdala
olfactory, septal nuclei, hypothalamus, bed nucleus of stria terminalis, cortex (temporal, prefrontal, cingulate), hippocampus, and brainstem nuclei
outputs of the amygdala
septal nuclei, nuclues accundens, hypothalamus, hippocampus, cortex, and brainsstem nuclei
sensation of smell reaches the cortical areas without going through the
thalamsu
olfactory input reaches the _______and __________ and therefore smell, scent is associated with the memories as well.
amygdala and hippocampus
the ________-is known to attach emotional significance to sensory input
amygdala
agnosia
visual tactile and auidotyr
hyperorality
examining objects excessively by mouth
hypermetamorphosis
intensively exploring the immediate environment
placidity
no fear or ange
hyperphagia
eating objects that aren’t food
Kluver-Bucy Syndrome
agnosia, hyperorality, hypermetamorphosis, placidity, hyperphagia, hypersexuality
outputs of the septal nuclei
cingulate cortex, septa nuclei, amygdala, hippocampus, ventral tegmental area
Korsakoff syndrome
prolonged thiamine deficiency typically in chronic alcohols, confabulation occurs, mammilary bodies, dorsomedial nucleus of thalamus, fornix, and the hippocampal formation are lesionsed
confabulation
stringing together fragments of memory form different events to create an artificial memory of an event that never occured
wernicke-korsakoff syndrome
korsakoff plus ataxia (cerebellar damage)
akinetic mutism
bilateral lesions of the anterior part of the cingulate gyrus, diinished emotional respoonse, patient is immobile, mute and unresponsive, memory deficits are common
