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WVSOM -- Medical Neuroanatomy -- Limbic System

What is the function of the limbic system? cognitive and visceral responses to emotion and processes involved with memory
Where are limbic system structures located? around the corpus collosum on medial surface of the cerebral hemispheres
What makes up the limbic system? cingulate gyrus, hippocampus, parahippocampal gyrus, amygdala (uncus) hypothalamus, and anterior/medial thalamic nuclei
What is the purpose of the papez circuit? circuit that permits a cognitive and visceral response to emotions
What are the 6 steps to the papez circuit cingulate gyrus recieves inpout from neocortex and thalamus. 2/3) cingualte projects to hippocampus and amygdala 4)projections form parahippocampal gyrus and uncus thru fornix to mamillary bodies 5)mamilary bodies project to m/a thalmic nuclei 6)neocortex
What are the layers of the hippocampus? stratum radiatum, stratum pyrammidale and strata oriens
What is in stratum radiatum? dendrites
What is in stratum pyrammdiale? soma
Waht is in strata oriens? proximal axons
What is the functino of the hippocampus? processing and storing of explicit memory for long-term storage
What are the 2 different types of memory? explicit and implicit
What memory is stored in the hippocampus? spatial memory
What is explicit memory knowledge of people, places and things along with the meaning of those facts. Spacial memory included
What is implicit membory knowledge of how to perform a motor or perceptual skill
What does damage to the hippocampus result in? inability to form new long term explicit memories. Short term memory intact
What is LTP? Long-term potentiation. Synapses are enhanced to addition of AMPA receptors to post-synaptic membrane.
What is LTD? Long Term Depression. Synapses are reduced in effeciency due to removal of AMPA receptors from the post synaptic membrane. occurs after a bout of low frequency action potentials in teh presynaptic neuron
Created by: tjamrose