Plexus cervicalis

Plexus Cervicalis is a network of nerve fibers that originates from the anterior rami of the first four cervical nerves (C1-C4) and supplies nerves to the diaphragm, among other structures. It is part of the peripheral nervous system and is located in the neck region.

Anatomy

The Plexus Cervicalis is formed by the anterior rami of the upper four cervical nerves. The first cervical nerve, or C1, is often excluded due to its unique path and function. The plexus is located in the posterior triangle of the neck, sandwiched between the prevertebral muscles and the sternocleidomastoid muscle.

Branches

The branches of the Plexus Cervicalis can be categorized into two groups: the superficial and the deep branches. The superficial branches include the lesser occipital nerve, the great auricular nerve, the transverse cervical nerve, and the supraclavicular nerves. The deep branches include the phrenic nerve, the ansa cervicalis, and the segmental branches.

Function

The Plexus Cervicalis provides sensory information from the neck, the back of the head, and the superior part of the shoulders. It also supplies motor innervation to several muscles in the neck.

Clinical Significance

Damage to the Plexus Cervicalis can result in a variety of symptoms, depending on the specific nerves affected. These can include pain, numbness, and muscle weakness in the neck and shoulder region. Conditions such as cervical radiculopathy and brachial plexus injury can involve the cervical plexus.