Interspinales muscles

Interspinales muscles
Details
Origin	Spinous process
Insertion	Spinous process
Nerve	Posterior rami of spinal nerves
Actions	Extension of vertebral column.
Identifiers
Latin	Musculi interspinales
TA	A04.3.02.301
FMA	22841
*Anatomical terms of muscle* [edit on Wikidata]

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

In the cervical region the cervical interspinales 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 the thoracic interspinales are found between the first and second vertebrae, and sometimes between the second and third, and between the eleventh and twelfth.
In the lumbar region there are four pairs of lumbar interspinales in the intervals between the five lumbar vertebrae. There is also occasionally one between the last thoracic and first lumbar, and one between the fifth lumbar and the sacrum.

References

This article incorporates text in the public domain from the 20th edition of Gray's Anatomy (1918)

splenius	capitis cervicis

erector spinae	iliocostalis longissimus spinalis

transversospinales	semispinalis thoracis semispinalis cervicis semispinalis capitis multifidus rotatores interspinales intertransversarii

Vertebral column	trapezius latissimus dorsi rhomboid major minor levator scapulae

Fascia	thoracolumbar fascia

Intercostal muscle external internal innermost subcostalis transversus thoracis levatores costarum serratus posterior inferior superior thoracic diaphragm

Thoracic cavity	pectoralis major pectoralis minor subclavius serratus anterior sternalis

Fascia	pectoral fascia clavipectoral fascia

This article is issued from Wikipedia - version of the 11/18/2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.