drifter_skylight
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Sorry if this sounds dumb need some clarification

so I would like to know is phrenic part of the somatic system and is vagus only autonomic?

I know somatic is voluntary - and phrenic goes to diaphragm - so phrenic is apparently somatic?

Vagus - is that purely autonomic - that would make sense In terms of digestion, heart - etc

I just need the correct answer on what kind of nerve they both are.


many thanks!!!
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Jckc123
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Hi there. Hope I can help.

Phrenic nerve is part of the somatic nervous system since it's a mixed spinal nerve (c3,c4,c5) and is responsible for sensory and motor function. Sensory aka diaphragm, mediastinal and diaphragmatic pleura and motor being the actual diaphragm movement during respiration.

Vagus nerve is a cranial nerve (coming from the brain) and has functions in both somatic and autonomic nervous system. Somatic wise, it has sensory components to the ear, tongue, larynx etc and plenty of muscles in the pharynx, larynx etc for motor. The autonomous function as you said regarding to heart and digestion.

Hope this helps.
(Nerves are complicated.. I still get them wrong.. )
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