UNITED BACK SPECIALISTS - Anatomy of Cervical Spine


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Anatomy of Cervical Spine (Neck)

The cervical spine begins at the base of the skull. Seven vertebrae make up the cervical spine with eight pairs of cervical nerves. The individual cervical vertebrae are abbreviated C1, C2, C3, C4, C5, C6 and C7. The cervical nerves are also abbreviated; C1 through C8.

parts of a cervical vertebrae Cervical Vertebrae and Supporting Structures

The cervical bones - the vertebrae - are smaller in size when compared to other spinal vertebrae. The purpose of the cervical spine is to contain and protect the spinal cord, support the skull, and enable diverse head movement (e.g., rotate side to side, bend forward and backward).

A complex system of ligaments, tendons, and muscles help to support and stabilize the cervical spine. Ligaments work to prevent excessive movement that could result in serious injury. Muscles also help to provide spinal balance and stability, and enable movement. Muscles contract and relax in response to nerve impulses originating in the brain. Some muscles work in pairs or as antagonists. This means when a muscle contracts, the opposing muscle relaxes. There are different types of muscle: forward flexors, lateral flexors, rotators, and extensors.

Spinal Cord and Cervical Nerve Roots

Nerve impulses travel to and from the brain through the spinal cord to a specific location by way of the peripheral nervous system (PNS). The PNS is the complex system of nerves that branch off from the spinal nerve roots. These nerves travel outside of the spinal canal or spinal cord into the organs, arms, legs, fingers - throughout the entire body.

Injury or mild trauma to the cervical spine can cause a serious or life-threatening medical emergency (e.g. spinal cord injury or SCI, fracture). Pain, numbness, weakness, and tingling are symptoms that may develop when one or more spinal nerves are injured, irritated, or stretched. The cervical nerves control many bodily functions and sensory activities.

C1: Head and neck
C2: Head and neck
C3: Diaphragm
C4: Upper body muscles (e.g. Deltoids, Biceps)
C5: Wrist extensors
C6: Wrist extensors
C7: Triceps
C8: Hands