PSY 250 Lecture Notes - Lecture 3: Dura Mater, Pia Mater, Somatic Nervous System
5 Apr 2018
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Document Summary
The vertebrate nervous system is composed of two divisions: The central nervous system- is the division of the nervous system located within the skull and spine. Composed of the brain and spinal cord. The peripheral nervous system- is the division located outside the skull and spine. Composed of the somatic nervous system which interacts with the external environment. It is composed of afferent nerves that carry sensory signal from the skin, skeletal muscles, joints, eyes, ears and so on to the cns. Also composed of efferent nerves that carry motor signals from the cns to the skeletal muscles. The autonomic nervous system is part of the pns that regulates the (cid:271)ody"s internal environment. It is composed of afferent nerves that carry sensory signals from internal organs to cns and efferent nerves that carry motor signals from the cns to internal organs: the ans has two different kinds of efferent nerves.
