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Posterior Ramus of Fourth Cervical Nerve (Left)
Nervous System

Posterior Ramus of Fourth Cervical Nerve (Left)

Ramus posterior nervi cervicalis quarti

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Quick Facts

Origin: Fourth cervical nerve.

Course: Winds posteriorly around the C4 articular pillar.

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 of the posterior neck.

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Origin

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

Course

The posterior ramus of the fourth cervical nerve runs backwards and winds around the articular pillar of C4 vertebra.

Branches

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

Supplied Structures

The lateral branch of the posterior ramus provides somatic motor 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, and trapezius, before becoming cutaneous.

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