costotransverse

The Ligament of the Tubercle of the Rib (ligamentum tuberculi costæ posterior costotransverse ligament).

III. Syndesmology. 5e. Costovertebral Articulations 1918

Each rib may be regarded as a lever the fulcrum of which is situated immediately outside the costotransverse articulation, so that when the body of the rib is elevated the neck is depressed and vice versa; from the disproportion in length of the arms of the lever a slight movement at the vertebral end of the rib is greatly magnified at the anterior extremity.

III. Syndesmology. 5g. Articulation of the Manubrium and Body of the Sternum 1918

A band of fibers, the lumbocostal ligament, in series with the anterior costotransverse ligaments, connects the neck of the twelfth rib to the base of the transverse process of the first lumbar vertebra; it is merely a thickened portion of the posterior layer of the lumbodorsal fascia.

III. Syndesmology. 5e. Costovertebral Articulations 1918

The first rib has no anterior costotransverse ligament.

III. Syndesmology. 5e. Costovertebral Articulations 1918

—The anterior costotransverse ligament is attached below to the sharp crest on the upper border of the neck of the rib, and passes obliquely upward and lateralward to the lower border of the transverse process immediately above.

III. Syndesmology. 5e. Costovertebral Articulations 1918

Similarly, the strong ligaments binding the necks and tubercles of the ribs to the transverse processes limit the movements of the costotransverse joints to slight gliding, the nature of which is determined by the shape and direction of the articular surfaces (Fig. 314).

III. Syndesmology. 5e. Costovertebral Articulations 1918

The two joints, costocentral and costotransverse, move simultaneously and in the same directions, the total effect being that the neck of the rib moves as if on a single joint, of which the costocentral and costotransverse articulations form the ends.

III. Syndesmology. 5e. Costovertebral Articulations 1918

Section of the costotransverse joints from the third to the ninth inclusive.

Illustrations. Fig. 314 1918

The Ligament of the Neck of the Rib (ligamentum colli costæ middle costotransverse or interosseous ligament).

III. Syndesmology. 5e. Costovertebral Articulations 1918

—The posterior costotransverse ligament is a feeble band which is attached below to the neck of the rib and passes upward and medialward to the base of the transverse process and lateral border of the inferior articular process of the vertebra above.

III. Syndesmology. 5e. Costovertebral Articulations 1918