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Categorizations of neurons in the somatic nervous system include:

- Motor neurons, described as efferent fibers
- Sensory neurons, described as afferent fibers

Categorizations of Neurons in the Somatic Nervous System

Efferent fibers are nerve fibers that transmit signals away from a central point, such as the central nervous system (CNS). In the somatic nervous system, motor neurons are classified as efferent fibers because they carry instructions from the CNS to the muscles to initiate movement. A helpful mnemonic to remember their function is that 'efferent' corresponds with 'exit,' signifying signals moving away from the CNS.

Efferent Fibers in the Somatic Nervous System

Afferent fibers are nerve fibers that transmit signals toward a central point, such as the central nervous system (CNS). Within the somatic nervous system, sensory neurons function as afferent fibers, carrying sensory information from the body to the CNS for processing. A useful mnemonic for this is that 'afferent' corresponds with 'arrive,' indicating signals moving toward the CNS.

Afferent Fibers of the Somatic Nervous System

When you consciously decide to kick a soccer ball, a signal must travel from your central nervous system to the muscles in your leg to initiate the movement. This instruction to move is transmitted by which of the following?

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