deep superficial / deep intermediate back muscles Flashcards
splenius capitis origin
- nuchal ligament
- SP C7-T3/T4
splenius capitis insertion
mastoid process
splenius capitis action
bilateral action:
- extension of head
unilateral action:
- ipsilateral flexion and rotation of head
splenius capitis innervation
dorsal rami
splenius cervicis origin
SP T3-T6
splenius cervicis insertion
TP C1-C3
splenius cervicis action
bilateral action:
- extension of head
unilateral action:
- ipsilateral flexion and rotation of head
splenius cervicis innervation
dorsal rami
iliocostalis origin
- posterior iliac crest
- posterior sacrum
- SP L/S vertebrae
iliocostalis insertion
- ribs
- TP of cervical vertebrae
iliocostalis action
bilateral action:
- extend vertebral column and neck
unilateral action:
- ipsilateral flexion and rotation
iliocostalis innervation
dorsal rami
longissimus origin
- posterior iliac crest
- posterior sacrum
- SP L/S vertebrae
longissimus insertion
- ribs
- TP of C/T vertebrae
- mastoid process
longissimus action
bilateral action:
- extend vertebral column and neck
unilateral action:
- ipsilateral flexion and rotation