Cervical spinal nerve 2

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The cervical spinal nerve 2 (C2) is a spinal nerve of the cervical segment of spinal cord. It originates from the spinal cord and emerges from the intervertebral foramen between the first and second cervical vertebrae (C1 and C2).

Anatomy

The C2 nerve is part of the cervical plexus, which is a network of nerves formed by the anterior rami of the first four cervical spinal nerves (C1-C4). The cervical plexus is located in the neck, deep to the sternocleidomastoid muscle.

Branches

The C2 nerve gives rise to several important branches, including the greater occipital nerve, which provides sensory innervation to the skin of the posterior scalp up to the vertex of the skull. It also contributes to the lesser occipital nerve, which supplies the skin of the upper neck and the area behind the ear.

Function

The primary function of the C2 nerve is to provide sensory innervation to the skin of the posterior scalp and upper neck. It also plays a role in motor innervation to some of the muscles in the neck.

Clinical significance

Injury or compression of the C2 nerve can lead to pain and sensory disturbances in its area of distribution. Conditions such as cervical radiculopathy can affect the C2 nerve, leading to symptoms such as neck pain, headaches, and sensory deficits in the scalp and neck.

See also

• Cervical spinal nerve
• Cervical vertebrae
• Cervical plexus
• Greater occipital nerve
• Lesser occipital nerve