Spinal Cord Sensory

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Posterior horn

Dorsal root ganglion

Sensory neuron cell body

Posterior horn

Dorsal root ganglion

Sensory neuron cell body

Spinal Cord Posterior Horn Sensory
Figure 2.14 Peripheral Nervous System

The peripheral nervous system (PNS) consists of all of the neural elements outside of the CNS (brain and spinal cord) and provides the connections between the CNS and all other body organ systems. The PNS consists of somatic and autonomic components. The somatic component innervates skeletal muscle and skin and is shown here (see Figure 2.15 for the autonomic nervous system). The somatic component of the peripheral nerves contains both motor and sensory axons. Cell bodies of the motor neurons are found in the anterior horn gray matter, whereas the cell bodies of sensory neurons are located in the dorsal root ganglia.

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