Superficial Expaxial Muscles Flashcards
Splenius: origin
- Cervical and thoracic spinous processes
2. Nuchal ligament
Splenius: insertion
- Cervical transverse processes
- Occipital bone
- Mastoid process
Splenius: action
Bilateral: extend head and neck
Unilateral: laterally flex and rotate head and neck
Splenius: innervation
Cervical dorsal rami
Iliocostalis, longissimus, spinalis: origin
- Posterior sacrum
- Iliac crest
- Sacrospinous ligament
- Spinous processes of lumbar and sacral vertebra
Iliocostalis: insertion
- Cervical and thoracic transverse processes
2. Angles of ribs
Longissimus: insertion
- Cervical and thoracic transverse processes
2. Mastoid process
Spinalis: insertion
Cervical and thoracic spinous processes
Semispinalis: origin
Transverse processes of cervical and thoracic vertebrae
Semispinalis: insertion
Spinous processes 6-7 segments superior to origin
Occipital bone
Iliocostalis: action
B: extend vertebral column
U: laterally flex vertebral column
Longissimus: action
B: extend vertebral column and head
U: laterally flex vertebral column and rotate head
Spinalis: action
B: extend vertebral column
U: laterally flex vertebral column
Semispinalis: action
B: extend vertebral column and head
U: laterally flex vertebral column and head
Multifidus: origin
Transverse processes of all vertebrae
