Intrinsic Back Muscles (Not organized by layer) Flashcards
Splenius capitis - Attachments
FROM:
*ligamentum nuchae
*spinous processes C7-T4
TO:
*mastoid process
Splenius capitis - Actions
extension, lateral flexion, ipsilateral rotation (of neck)
Splenius capitis - Innervation
dorsal rami of spinal nerves
Splenius cervicis - Attachments
FROM:
*spinous processes of T3-T6
TO:
*posterior tubercles of transverse processes of C1-3
Splenius cervicis - Actions
extension, lateral flexion, ipsilateral rotation (of neck)
Splenius cervicis - Innervation
dorsal rami of spinal nerves
Erector spinae - Attachments
FROM:
*Thoracolumbar Fascia
*sacrum
*iliac crest
*spinous processes T11-L5
*supraspinous lig.
*angles of ribs
TO:
*costal angles (iliocostalis)
*ribs & transverse processes (longissimus)
*spinous processes (spinalis)
SECTIONS:
1. Spinalis: thoracis, cervicis, capitis (represented as semispinalis capitis)
2. Longissimus: capitis, cervicis, thoracis
3. Iliocostalis: cervicis, thoracis, lumborum
Erector spinae - Actions
extension & lateral flexion of the vertebral column
Erector spinae - Innervation
Lateral br. or dorsal rami of spinal nn.
Semispinalis (transversospinales group) - Attachments
FROM:
*transverse processes
TO:
*distant superior spinous processes
SECTIONS:
1. Semispinalis: capitis, cervicis, thoracis
Semispinalis (transversospinales group) - Actions
extension & contralateral rotation of the vertebral column
Semispinalis (transversospinales group) - Innervation
Dorsal rami of spinal nn.
Multifidus (transversospinales group) - Attachments
FROM:
*sacrum
*posterior SI ligament
*posterior iliac spine
*transverse processes
TO:
*more superior spinous processes
SECTIONS:
*sacral, lumbar, thoracic, cervical
Multifidus (transversospinales group) - Actions
extension & contralateral rotation of the vertebral column
Multifidus (transversospinales group) - Innervation
Dorsal rami of spinal nn.
