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Posterior Ramus of Seventh Cervical Nerve (Left)
Nervous System

Posterior Ramus of Seventh Cervical Nerve (Left)

Ramus posterior nervi cervicalis septimi

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Quick Facts

Origin: Seventh cervical nerve.

Course: Winds posteriorly around the C7 articular pillar and divides into its branches.

Branches: Medial and lateral branches.

Supply: Motor innervation to semispinalis capitis, multifidus, interspinales, longissimus colli, splenius colli, and iliocostalis colli muscles. Sensory innervation to the skin just below the neck.

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Origin

The posterior ramus of seventh cervical nerve is one of two branches of the seventh cervical nerve, the other being the anterior ramus.

Course

The posterior ramus of the seventh cervical nerve runs backwards and winds around the articular pillar of C7 vertebra.

Branches

The posterior ramus of the seventh cervical nerve gives rise to medial and lateral branches.

Supplied Structures

The lateral branch of the dorsal ramus provides motor somatic innervation to the longissimus colli, splenius colli, and iliocostalis colli muscles. Those which pass through the medial branch provide motor innervation to multifidus, semispinalis colli, semispinalis capitis, splenius colli, and trapezius, before becoming cutaneous.

The sensory afferent neurons, which provide innervation to the skin above the trapezius, transmit general sensory information regarding pain, touch, pressure, vibration, etc. via the medial branch of the dorsal ramus.

Learn more about this topic from other Elsevier products

Cervical Nerves

ScienceDirect image

Burner or stinger syndrome is a syndrome resulting from injuries to either the upper cervical nerve roots or the upper trunk of BP.

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