PSYCH 2NF3 Chapter Notes - Chapter 3: Inferior Colliculus, Hypothalamus, Superior Colliculus

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85 billion neuron cells with up to 15000 connections each. 86 billion glial cells nuclei are clusters with specific functions tracts are pathways, long distance connections between cells. Superior/inferior also used to refer to dorsal and ventral. Coronal section is cut vertically produces frontal view. Horizontal section is cut horizontally, producing dorsal view. Sagittal section is cut vertically through the length of the brain, producing a medial view. Proximal structures are nearby whereas distal are distant. Afferent go towards the brain while efferent go away from it. Cns (central nervous system) is the brain and spina chord everything else is the peripheral nervous system. The somatic nervous system (sns) sensory organs, muscles, joint, skin, to and from the cns. The autonomic nervous system (ans) controls internal organs. Cns is protected by skill and vertebrae while pns has an easier time regenerating. Meninges are three layers of membrane between the brain and skull, protecting the brain.

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