The Nervous System

The Nervous System - state of the internal organs while the...

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The Nervous System The nervous system is the control center of the body. It receives information from peripheral and visceral receptors about the internal and external environment. This information is sent to the brain or spinal cord where it is processed and integrated. If required, the brain or spinal cord will initiate a response by sending a signal to the effectors of the body. Divisions of the Nervous System There are two major anatomical divisions of the nervous system. The central nervous system consists of the brain and spinal cord while the peripheral nervous system is the nerves entering and exiting the brainstem or spinal cord and the ganglia . The nervous system can also be divided functionally. The sensory divisions consist of afferent neurons that send information about the environment towards the CNS. The visceral sensory division receives and transmits information about the
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Unformatted text preview: state of the internal organs while the somatic sensory division transmits information from the the body as a whole, including information coming from the external environment. In contrast, the motor division sends signals from the CNS to the effectors of the body. The motor division can be further subdivided into autonomic and somatic . The somatic motor division controls skeletal muscle. The autonomic nervous systems controls those structures that are not under conscious control, like cardiac and smooth muscle and various glands. The autonomic nervous system can be further divided into sympathetic and parasympathetic division. The sympathetic nervous system readies the body for action, the so-called fight-or-flight response. The parasympathetic nervous system restores equilibrium to the body and is often referred to as "rest-and-digest"....
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This note was uploaded on 01/30/2012 for the course BSC BSC1085 taught by Professor Sharonsimpson during the Fall '10 term at Broward College.

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The Nervous System - state of the internal organs while the...

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