PSYCH 3240 Chapter Notes - Chapter 3: Pia Mater, Dura Mater, Peripheral Nervous System
9 Sep 2016
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Document Summary
Central nervous system (cns): the portion of the nervous system within the skull and spine. Peripheral nervous system (pns): the portion of the nervous system outside the skull and spine. Somatic nervous system (sns): the part of the peripheral nervous system that interacts with the external environment. Afferent nerves: nerves that carry sensory signals to the central nervous system; sensory nerves. Efferent nerves: nerves that carry motor signals from the central nervous system to the skeletal muscles or internal organs. Autonomic nervous system (ans): the part of the peripheral nervous system that participates in the regulation of the body"s internal environment. Sympathetic nerves: those motor nerves of the autonomic nervous system that project from the cns in the lumbar and thoracic areas of the spinal cord. Parasympathetic nerves: those motor nerves of the autonomic nervous system that project from the brain) as components of cranial nerves) or from the sacral region of the spinal cord.
