PSYC 271 Lecture Notes - Lipid Bilayer, Precentral Gyrus, Substantia Nigra

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Jan/ 26/12: general layout of the nervous. The nervous system is divided between the central nervous. Cns is composed of the brain and spinal cord and consists of 12 pairs of cranial nerves with sensory or motor functions: ex. If one of the optic nerves are damaged, you can lose sight in that eye. If there is a lesion in the visual cortex, you can only see in the central region of the visual field. Pns is comprised of somatic and autonomic nervous systems and have nerves that project from the spinal cord. The somatic nervous system (sns) is the part of the pns that interacts with the external environment and is composed of afferent nerves, which carry sensory signals from the skin, skeletal muscles etc to the cns. Efferent nerves carry motor signals from cns skeletal muscles. Autonomic nervous system (ans) is the part of the peripheral nervous system that regulates the body"s internal environment.

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