1what is the deep group or intrinsic muscles
transversospinalis muscles
2what is the origin of the transversospinalis muscles
transverse process
3what is the insertion of the transversospinalis muscles
spinous processes
4how do the fibers of the transversospinalis muscles run
superomedially
5what is the bilateral action of the transversospinalis muscles
extend and stabalize vert column
6what are the unilateral actions of the transversospinalis muscles
rotate vert column, head/neck contralaterally
7what are the three parts of the semispinalis
capitis, cervices, thoracis (very tiny)
8what is the origin of the semispinalis
transverse processes of thoracic and cervical verts
9what is the insertion of the semispinalis capitis
occipital bone
10what is the insertion of the semispinalis cervices
cervical spinous processes; ends at C2
11what is the action of the semispinalis
rotate head/neck contralaterally
12what is the origin of the multifidus
sacrum, ilium, lumbar vertebrae
13what is the insertion of the multifidus
spans 2-4 segments to insert onto spinous process of lumbar and thoracic verts
14what is the action of the multifidus
stabalize vertebral column
15what is the origin of the rotatores
transverse processes
16what is the insertion of the rotatores
spinous processes and lamina
17what is the action of the rotatores
assist with stabilization and rotation
18what are the three deep accessory muscles
interspinales, intertransversarii, levatores costarum
19what is the function of the interspinales
assist with extension
20what is the function of the intertrasversarii
assist in lateral flexion
21what is the function of the levatores costarum
elevates ribs, accessory muscle of respiration, assist in lateral flexion