Posterior Branches (C1 – C8)
The dorsal branches of the cervical nerves, or posterior branches, supply motor fibers toneck muscles belonging to the autoch-thonous muscles of the back and sensory fibers to the skin of the neck.
The posterior branch of the first cervical nerve is exclusively motor and runs as sub-occipital nerve to the small muscles in theregion of occiput, atlas, and axis. The greater occipital nerve runs from the second cervical nerve to the occiput and supplies its skin up to the vertex.
The posterior branch of the third cervical spinal nerve, the third occipital nerve, sup-plies sensory fibers to the neck region.
The remaining posterior branches of the cervical spinal nerves supply sensory fibers to the skin area bordering caudally and motor fibers to the autochthonous back muscles of this region.
Innervation of the skin (B).Autonomiczone (dark blue) and maximum zone (light blue).