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Janelle Leboutillier

NROB60: NEUROANATOMY Lecture Two: The Structure of the Nervous System Function Follows Structure Early observations of structure led to interpretations about function. They went about doing this via ablation to determine function by observing the deficits that resulted as a result of removing a part of the brain Constantly refined as new data is available Advances in technology and in knowledge Genetic manipulation (knock outs, etc). The size, shape, and convolutions of the brains differ; however, there are a great number of similarities in terms of structure (i.e. possession of cerebrum and cerebellum) Special features of the Human central nervous system Basic arrangement of various structures Differences in rat and human brain Convolutions on human cerebrum surface (called sulci and gyri) - Lissencephalic (rat) and gyrencephalic (human); the cortex is folded upon itself Size of olfactory Bulb; the rodents possess a larger structure because they depend on olfactory senses for survival. Growth of cerebral hemisphere: temporal, frontal, parietal, occipital Dorsal view. You dont see the cerebellum in the human brain Mid Saggital View. The rat possesses many of the same & larger structures as humans do in the internal subcorticol areas of the brain, but lacks cortical matter.
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