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The Somatic Nervous System
The somatic nervous system is a subdivision of the peripheral nervous system responsible for activities considered conscious or voluntary. It functions as a relay system for sensory and motor information between the central nervous system (CNS) and the rest of the body. Consequently, it is composed of both motor neurons (efferent fibers) and sensory neurons (afferent fibers).
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The Somatic Nervous System
The Autonomic Nervous System
Comparison of the Somatic and Autonomic Nervous Systems
Imagine you are walking down a quiet street when a car horn blares unexpectedly. You consciously turn your head toward the sound, and at the same time, your heart begins to beat much faster. Which subdivisions of the peripheral nervous system are responsible for turning your head and for the increase in your heart rate, respectively?
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Categorizations of Neurons in the Somatic Nervous System
Coordinating a Voluntary Action
When you consciously decide to kick a soccer ball, your brain sends signals to your leg muscles, and you feel the impact as your foot connects with the ball. Which division of the nervous system is primarily responsible for transmitting these specific motor commands and sensory information for this voluntary action?
Somatic Control of Walking