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Adult Cervical Plexus

(phrenic nerve shown lower right)

Innervation of the human diaphragm is by the phrenic nerves, arising from the same segmental levels from which the diaphragm skeletal muscles arise, segmental levels C3 to C5.

The paired phrenic nerves are mixed containing motor neurons for the diaphragm and sensory nerves for other abdominal structures (mediastinum, pleura, liver, gall bladder).

Other respiratory muscles include the intercostals which are innervated by the intercostal nerves arising from segmental levels T1 to T11.

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current15:48, 24 August 2009Thumbnail for version as of 15:48, 24 August 2009471 × 600 (30 KB)MarkHill (talk | contribs)Adult Cervical Plexus (phrenic nerve shown lower right) nnervation of the human diaphragm is by the phrenic nerves, arising from the same segmental levels from which the diaphragm skeletal muscles arise, segmental levels C3 to C5. The paired phrenic n

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