Interspinales muscles

Interspinales muscles
Latin	musculi interspinales
Gray's	subject #115 400
Origin	Spinous process
Insertion	Spinous process
Artery
Nerve	Posterior rami of spinal nerves
Actions	Extension of vertebral column.

The Interspinales are short muscular fasciculi, placed in pairs between the spinous processes of the contiguous vertebræ, one on either side of the interspinal ligament.

• In the cervical region they are most distinct, and consist of six pairs, the first being situated between the axis and third vertebra, and the last between the seventh cervical and the first thoracic. They are small narrow bundles, attached, above and below, to the apices of the spinous processes.

• In the thoracic region, they are found between the first and second vertebræ, and sometimes between the second and third, and between the eleventh and twelfth.

• In the lumbar region there are four pairs in the intervals between the five lumbar vertebræ. There is also occasionally one between the last thoracic and first lumbar, and one between the fifth lumbar and the sacrum.

External links

• LUC ints
• -113967025 at GPnotebook
• interspinales+%28muscles%29 at eMedicine Dictionary

This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained within it may be outdated.