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Cervical vertebra 7

Other Terms: C7 vertebra, Prominent vertebra, Vertebra prominens (CVII), Vertebra prominens [C VII]

Type

irregular

Description

This cervical vertebra differs from its superior predecessors in having a long, transverse, dorsally projecting spine that is strong and thick. Its transverse processes are thick and more prominent with highly variable transverse foramina. Because of its long prominent spine, the first obviously palpable spine in the vertebral column, it receives the name the vertebra prominens.

Etymology

The word cervical arises from the Latin term cervix meaning neck. This is an ancient term that has passed through the centuries literally unchanged. The word vertebra is an old Latin term that meant a joint or something to be turned. It arises from the Latin verto meaning to turn. In A.D. 30 Celsus used the word to designate any joint. It was only in later years that the bone arrived at its present meaning.

Articulations

This vertebra articulates with two other vertebrae: the superior and inferior neighboring vertebrae. Six articular surfaces unite each typical vertebra. The two superior articular facets articulate with the corresponding inferior articular facets of the adjacent vertebra and the superior and inferior surfaces of the vertebral bodies form an articulation via the intervertebral disc of cartilage.

Ossification

Five cartilaginous centers arise as anlage to all vertebrae and ribs. One center forms the body, two anterolateral centers form the costal elements, two posterolateral centers form the vertebral arch elements. In this vertebra the body anlage begins to ossify during the third intrauterine month. At this time the ossification centers for the costal and arch anlagen appear and merge into paired lateral centers. At birth, the three ossifying centers are still separate. The two laminae unite during the second year, but they do not join the body until years three to six. This fusion typically begins cranially and progresses caudally. Secondary centers appear on the tips of the transverse and spinous processes and on the inferior and superior surfaces of the bodies. These secondary centers appear during the middle teen years and fuse in the mid-twenties.

Latin

Vertebra prominens [C VII]

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