Transversospinales muscles
Encyclopedia
The transversospinal muscles are a group of muscle
s of the human back
. Their combined action is rotation and extension of the vertebral column. They include:
Muscle
Muscle is a contractile tissue of animals and is derived from the mesodermal layer of embryonic germ cells. Muscle cells contain contractile filaments that move past each other and change the size of the cell. They are classified as skeletal, cardiac, or smooth muscles. Their function is to...
s of the human back
Human back
The human back is the large posterior area of the human body, rising from the top of the buttocks to the back of the neck and the shoulders. It is the surface opposite to the chest, its height being defined by the vertebral column and its breadth being supported by the ribcage and shoulders...
. Their combined action is rotation and extension of the vertebral column. They include:
- semispinalis, spanning 4-6 vertebral segments
- semispinalis dorsiSemispinalis dorsiThe Semispinalis dorsi consists of thin, narrow, fleshy fasciculi, interposed between tendons of considerable length....
- semispinalis cervicisSemispinalis cervicisThe semispinalis cervicis , thicker than the semispinalis dorsi, arises by a series of tendinous and fleshy fibers from the transverse processes of the upper five or six thoracic vertebræ, and is inserted into the cervical spinous processes, from the axis to the fifth inclusive.The fasciculus...
- semispinalis capitisSemispinalis capitisThe Semispinalis capitis is situated at the upper and back part of the neck, deep to the Splenius, and medial to the Longissimus cervicis and capitis....
- semispinalis dorsi
- multifidusMultifidus muscleThe multifidus muscle consists of a number of fleshy and tendinous fasciculi, which fill up the groove on either side of the spinous processes of the vertebrae, from the sacrum to the axis...
, spanning 2-4 vertebral segments - rotatoresRotatores muscleThe Rotatores lie beneath the Multifidus and is present in all spinal regions but most prominent in the thoracic region; they are eleven in number on either side....
, spanning 1-2 vertebral segments- rotatores cervicis
- rotatores thoracis
- rotatores lumborum