Neurobiology notes 1

Neurobiology notes 1 - Neurobiology notes Leborgne(Tan was...

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Neurobiology notes 1/15/08 Leborgne (Tan) was Broca’s patient whom he named Broca's areas from. Tan had neurosyphilis. Most areas of cortex are 6 layers thick Uncus- pear shaped connected to limbic system? Orbitofrontal cortex CN1 (nerve ends in olfactory bulb) Parahippocampal gyrus- emotional aspects of vision and limbic system Hippocampus- 3 layers of cortex “primitive brain” archicortex, most cells are small. The cells can divide and replicate. Has a rolled appearance allows for you to retain memory, typically short term memory. Alzheimer’s affects this. Acetylcholine is less in hippocampus in people with Alzheimer’s, smell also decreases. Associated with amygdala (link autonomic system with emotion; sick from stress & hives) White Matter Consists of mylenated matter 3 types: o projection fibers- inferior superior and vice versa don’t cross just send up/down; internal capsule from brain to spinal cord divided into: anterior limb, genu, posterior limb (common to destroy axons when having a stroke) o commissural fibers- fibers that cross anterior commissure, posterior commissure, corpus collosum (join left and right hemisphere) made up of splenium, body, genu, rostrum o association fibers: connect adjacent gyri, make lateral connections Subcortical areas major subcortical gray matter of cerebrum 3 main nuclei o caudate nucleus- looks like a huge comma, stroke kills it, stops unnatural motor movements and initiates them o putamen- looks like a wedge o globus pallidus- wedge shaped receive info from dopamine releasers, Parkinson’s disease is a disrupter o internal capsule is between, thalamus and between caudate and lenticular nuclei fornix- on corpus collosum- sends into through limbic system, important for rewarding information caudate and putamen together- striatum
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putamen and globus pallidus- lenticular nucleus all three (caudate, putamen, and globus pallidus)- corpus striatum
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