somatic nervous system

PNS - somatic

Part of peripheral nervous system that includes the somatic parts of the cranial and spinal nerves and their ganglia and the peripheral sensory receptors.

Type Nerve
Body System Nervous
Latin Name PNS - somatic
FMA ID 9904

Frequently Asked Questions

What is the somatic nervous system responsible for?
The somatic nervous system controls voluntary skeletal muscle movement and conveys conscious sensory information from the body surface, muscles, and joints to the CNS. It includes the cranial and spinal nerves innervating skin and skeletal muscles.
How does the somatic nervous system differ from the autonomic nervous system?
The somatic nervous system controls voluntary, conscious actions and conveys conscious sensations. The autonomic nervous system controls involuntary functions like heart rate and digestion. Somatic motor pathways use a single neuron to reach skeletal muscle, while autonomic pathways use two-neuron chains.
What is the role of sensory receptors in the somatic nervous system?
Peripheral sensory receptors in the somatic nervous system detect mechanical, thermal, and nociceptive (pain) stimuli from the skin, muscles, and joints. These signals are transmitted via afferent neurons through spinal or cranial nerves to the brain for conscious processing.

Related Structures

accessory nucleus of optic tract nuclei accessorii tractus optici accessory pretectal nucleus APN aggregate regional part of brain set of nuclei of neuraxis alar plate midbrain amiculum of dentate nucleus amiculum nuclei dentati amiculum of inferior olive ami ampulla caudalis ansa peduncularis ansa peduncularis in thalamo

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Educational Disclaimer

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Data sources: Terminologia Anatomica, Foundational Model of Anatomy, Wikidata.