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Dorsal (posterior) rami
Other Terms: Dorsal ramus, Posterior primary ramus, Ramus posterior, Dorsal ramus of spinal nerve
The posterior ramus supplies the back of the body wall and the neck. It provides sensory signals from the body to the spinal cord and motor signals from the spinal cord to the body. The posterior rami innervate the epaxial back muscles and the skin of the back.