出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2015/11/10 17:26:19」(JST)
| This article does not cite any references (sources). Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. (October 2013) |
| Longissimus | |
|---|---|
|
Deep muscles of the back - longissimus capitis visible at top right, longisimus cervicis visible at center upper right, and longissimus dorsi visible at center right
|
|
| Details | |
| Latin | musculus longissimus |
| Origin | transverse process |
| Insertion | transverse process |
|
Artery
|
lateral sacral artery |
|
Nerve
|
posterior branch of spinal nerve |
| Actions | Laterally: Flex the head and neck to the same side. Bilaterally: Extend the vertebral column. |
| Antagonist | Rectus abdominis muscle |
| Identifiers | |
| Gray's | p.399 |
| TA | A04.3.02.010 |
| FMA | 77178 |
| Anatomical terms of muscle | |
The longissimus is the muscle lateral to the semispinalis. It is the longest subdivision of the erector spinae that extends forward into the transverse processes of the posterior cervical vertebrae.
The longissimus thoracis is the intermediate and largest of the continuations of the erector spinae.
In the lumbar region, where it is as yet blended with the iliocostalis lumborum, some of its fibers are attached to the whole length of the posterior surfaces of the transverse processes and the accessory processes of the lumbar vertebræ, and to the anterior layer of the lumbodorsal fascia.
In the thoracic region, it is inserted, by rounded tendons, into the tips of the transverse processes of all the thoracic vertebræ, and by fleshy processes into the lower nine or ten ribs between their tubercles and angles.
The longissimus cervicis (transversalis cervicis), situated medial to the longissimus thoracis, arises by long, thin tendons from the summits of the transverse processes of the upper four or five thoracic vertebræ, and is inserted by similar tendons into the posterior tubercles of the transverse processes of the cervical vertebrae from the second to the sixth inclusive.
The longissimus capitis (trachelomastoid muscle) lies medial to the longissimus cervicis, between it and the semispinalis capitis.
It arises by tendons from the transverse processes of the upper four or five thoracic vertebræ, and the articular processes of the lower three or four cervical vertebrae, and is inserted into the posterior margin of the mastoid process, beneath the splenius capitis and sternocleidomastoideus.
It is almost always crossed by a tendinous intersection near its insertion.
|
||||||||||||||||||||||||||||||||||||||||||||||||||||||||
This article incorporates text in the public domain from the 20th edition of Gray's Anatomy (1918)
全文を閲覧するには購読必要です。 To read the full text you will need to subscribe.
| リンク元 | 「longissimus muscle」 |