Floating rib

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Floating rib
The four floating ribs (indicated with red arrows)
The six lower ribs on a woman (left) and a man. Note how small the four floating ribs are, especially on a woman.
Latin costae fluctuantes, costae fluitantes
Dorlands/Elsevier c_58/12262706

Floating ribs are four atypical ribs (two lowermost pairs, XI-XII) in the human ribcage. They are called so because they are attached to the vertebrae only, and not to the sternum or cartilage coming off of the sternum. Some people are missing one of the two pairs. Others have a third pair. Most, however, possess only two pairs.[citation needed]

Their position can be permanently altered by a form of body modification called tightlacing, which uses a corset to compress and move the ribs.

Anterior surface of sternum and costal cartilages.

Eleventh rib.

Twelfth rib.

v • d • e
Bones of torso
Sternum Suprasternal notch, Manubrium, Sternal angle, Body of sternum, Xiphisternal joint, Xiphoid process
Rib specific ribs (1, 2, 10, 11, 12, false - 8-12, floating - 11-12) - parts (Angle, Tubercle, Costal groove, Neck, Head)
General vertebral structures body of vertebra, vertebral arch (pedicle, lamina, vertebral notch), foramina (vertebral, intervertebral), processes (transverse, articular / zygapophysis, spinous)
Cervical vertebrae C1 (anterior arch, posterior arch, lateral mass), C2 (dens), C7, anterior tubercle, posterior tubercle, foramen transversarium
Thoracic vertebrae costal facets (superior, inferior, transverse)
Lumbar vertebrae accessory process, mammillary process
Sacrum/coccyx pelvic surface (anterior sacral foramina), dorsal surface (posterior sacral foramina, median sacral crest, medial sacral crest, lateral sacral crest), lateral surface (sacral tuberosity), base, sacral hiatus - presacral space - sacral promontory - sacral canal - ala of sacrum - sacrovertebral angle
v • d • e
Corsetry
front of corset by busk back of corset by stay-lace


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