PSY100H1 Chapter Notes - Chapter 3: Diencephalon, Midbrain, Cerebellum
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PSY100H1 Full Course Notes
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The neuron is the basic unit of the nervous system, excitable by electrical impulses, and specializes in communicating using chemical signals to other neurons. It serves three function: reception, conduction, and transmission. To relay message, the chemical signals is first detected by the branchlike extension of the neuron near the cell body called the dendrites. Then the relied information is collected and integrated in the cell body/ soma. Like other cells, the cell body is where the nucleus with all its genetic. Sensory neurons detect information from the physical world. They are also called afferent neuron as they relay the information received from the receptor in skin to the central nervous system or the spinal cord. Motor neurons or efferent neurons direct muscles to contract or relax, thereby producing movement. Somatosensory refers to the nerves that provide information from muscle and experience intrabody sensation. They communicate only with other material is stored.
