FOM 25 Deep Back Muscles Flashcards
Splenius capitis and cervicis mm. INSERTION
mastoid process and superior nuchal line (capitis portion) C1-C4 transverse processes (cervicis portion)
Splenus capitus and cervicis mm. ORIGIN
Ligamentum nuchae, T1-T4 spinous process
Splenius capitis and cervicis mm. ACTIONS
Unilateral: lateral flexion, and ipsilateral rotation of head/neck
Bilateral: extension of head/neck
Erector spinae group ORIGIN and columns
Common tendon from posterior iliac crest, dorsal sacrum, and lumbar spinous processes; addition slips originate along the axial skeleton
- Intercostalis m.
- Longissimus m.
- Spinalis m.
Iliocostalis m. INSERTION
angles of the ribs (lumborum and thoracis) and cervical transverse processes
Longissimus m. INSERTION
Thoracic transverse processes and adjacent ribs (thoracis), cervical transverse processes (cervicis), mastoid process (capitis)
Spinalis m. INSERTION
Upper thoracic spinous processes (thoracis); cervical spinous processes and ligamentum nuchae (cervicis); occipital bone between nuchal lines (capitis, usually infused with semispinalis capitis
Erector spinae mg. ACTIONS
unilateral: lateral flexion and ipsilateral rotation of the trunk and head/neck
bilateral: extension of trunk and head/neck
Transversospinalis g. ORIGIN
Dorsal sacrum and posterior iliac crest, lumbar mamillary processes, cervical and thoracic transverse processes
Transversospinalis g. INSERTION
spinous processes and occipital bone
Semispinalis m.
Spans 5-6 segments, best defined in the cervical region
*Most superficial group of the transversospinalis mm.
Semispinalis cervicis
from the thoracic transverse processes to upper cervical spinous processes, up to C2 (axis)
*Superficial of the semispinalis mm. (superficial to semispinalis capitis)
Semispinalis capitis
From cervical transverse processes to occipital bone; major extensor of the head.
*Deep to the semispinalis cervicis
Multifidus m.
3-4 segments, best defined in lumbar region
*intermediate of the transversospinalis g. (deep to semispinalis m., superficial to Rotator m.)
Multifidus lumborum
Dorsal sacrum and lumbar mamillary processes to lumbar and lower thoracic spinous processes
Rotator m.
1-2 segments, best defined in thoracic region
*Deepest transversospinalis g. m.