floating rib

floating rib

n.

A false rib whose anterior end is unattached. The lowest two pairs of human ribs are floating ribs.

rib

(rib) [AS. ribb]

RIB CAGE: Anterior view

One of a series of 12 pairs of narrow, curved bones extending laterally and anteriorly from the sides of the thoracic vertebrae and forming a part of the skeletal thorax. With the exception of the vertebral ribs, they are connected to the sternum by costal cartilages. See: illustration

asternal rib

False rib.

bicipital rib

An irregular condition resulting from the fusion of two ribs, usually involving the first rib.

cervical rib

A supernumerary rib sometimes developing in connection with a cervical vertebra, usually the lowest.

false rib

One of the lower ribs (8, 9, and 10) that do not join the sternum directly. Their cartilage connects to the cartilage of the seventh rib. The variation in the anatomy of the lower ribs may be considerable (i.e., there may be only two false ribs).

Synonym: vertebrochondral rib

floating rib

Vertebral rib.

lumbar rib

A rudimentary rib that develops in relation to a lumbar vertebra.

slipping rib

A rib in which the costal cartilage dislocates repeatedly.

spring fracture of rib

Outward displacement of the end of a broken rib, seen on x-ray examination of ribs that are broken by compression rather than by direct blows to the chest.

sternovertebral rib

True rib.

true rib

Any of ribs 1–7, which articulate directly with the sternum. Synonym: sternovertebral rib

vertebral rib

Any of ribs 1–7, which articulate directly with the sternum.

vertebrochondral rib

False rib.

vertebrocostal rib

Any of the three false ribs on each side.

floating rib

One of the two lowest pairs of short ribs that have no attachment at the front to the breastbone or the COSTAL CARTILAGES but end among the abdominal muscles.