CNS, ANS, Somatic, and Integrated Functions

5 4 mm thick 109 neurons 1012 synapses cerebellum

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Unformatted text preview: n’t get out very easily, mostly just glucose, oxygen, carbon dioxide. If there is a carrier protein, it can get out Fenestrations vs. Tight Junctions: supported by astrocytes Selective transport of glucose and amino acids Others transported: choline (Acetyl CoA), aspirin Not transported: catecholamines (epinephrine), inorganic ions some drugs Consequence: CSF composition differs from plasma and other ISF (diagnosis via spinal tap) Subdivisions of the Brain Brain: cerebral cortex, subcortical nuclei, diencephalon, limbic system Forebrain: cerebrum (cortex, basal nuclei) : diencephalon (thalamus, hypothalamus) Cerebellum Brainstem: midbrain, pons, medulla Cerebrum, thalamus, and hypothalamus are in the forebrain Brain stem: medulla, midbrain, pons Corpus collosum: division between right and left brain Cerebellum is important in balance Layers of the Cerebral cortex Convolutions- increase the surface area and volume Most advanced region evolutionary is the cerebral cortex The cortex is only 1.5- 4 mm thick, 10^9 neurons, 10^12 synapses Cerebellum Bilaterally symmetrical Functions: motor coordination and balance Coordination of eye and body movements Brainstem Connects forebrain and cerebellum to spinal cord Midbrain forebrain, pons cerebellum; medulla spinal cord Processing center for 10 of the 12 pairs of cranial nerves Reticular formation...
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