Spinal muscles

Question 1

Splenius

Answer 1

O- SP’s T1-3
I- Nuchal crest
In- Dorsal br. of cervical & thoracic n
F- Extension and lateral flexion of head & neck

Question 2

Iliocostalis

Lumborum & Thoracis

Answer 2

O- Ileum (lumbar)
Several adjacent ribs & TP’s of C7 (Thoracic)
I- TP’s of lumbar v and caudal ribs (Lumbar)
Caudal margin of the ribs of origin & TP’s of C7 (Thoracic)
In- Dorsal br of cervical and thoracic n
F- Fix lumbar v, & ribs, Laterally flex V. column (Lumbar)
Draw ribs cranially for inspiration (Thoracis)

Question 3

Longissimus

Capitis & Cervical

Answer 3

O- TP's pf thoracic v. 
     Articular proc of cervical v.
I- TP's of cervical v. (cervical)
   Mastoid process of temporal bone (capitis)
In- Dorsal br cervical spinal n
F- Elevate head and neck
    Fix & Extend V. column
    Lateral flexion of head and neck

Question 4

Longissimus

Lumbar & Thoracis

Answer 4

O- SP’s of sacral, lumbar & thoracic V.
I- TP’s and Accessory proc of lumbar & thoracic V, ribs
In- Dorsal br of lumbar and thoracic spinal n
F- Fix and extend V. column
Elevate head and neck
Lateral flexion of head & neck

Question 5

Spinalis

Thoracis & Cervicis

Answer 5

O- SP’s & Mam P’s of lumbar V (Thoracic)
SP’s of cranial thoracic V (Cervical)
I- SP’s of cranial thoracic V (Thoracic)
SP’s of Cervical V to axis (Cervical)
In- Dorsal br of lumbar, thoracic, cervical spinal n
F- Fix neck and dorsum
Laterally bend trunk and neck to side

Question 6

Semispinalis capitis

Answer 6

O- TP’s of cranial thoracic V
Art. P’s of C3-7
I- Nuchal surface of occipital bone (ventral to nuchal crest)
In- Dorsal br of cranial thoracic and cervical spinal n
F- Elevate & Laterally flex head + neck

Question 7

Multifidis

Cervical, Thoracis, Lumbar

Answer 7

O- Art. P's sacrum to axis (Cervical)
     Mamillary (lumbar + thoracic)
I- Spine of axis (cervical)
   SP's of vertebra 3 segments cranial to vertebra of origin
In- Dorsal br. of segmental spinal n
F- Fix & rotate V. column