Exam 1 - Back Muscles Flashcards
(170 cards)
Rotatores (brevis and longus) - origin
Transverse process of vertebrae at all levels

Obliquus capitis inferior - nerve
suboccipitial nerve
Rectus capitis posterior minor - nerve
Suboccipital nerve or dorsal ramus of cervical spinal nerve (C1)
Semispinalis capitis - insertion
attaches to occipital bone
Splenuis capitis - action
Solo - extends, rotates, and laterally flexes head to same side
Together - extends head and neck
Anatomical orientation:
lateral
further away from the midline
Semispinalis cervics - nerve
medial branches of posterior rami of lower cervical and upper thoracic nerves
spinalis -action
extends and laterally flexes trunk
Anatomical orientation:
Medial
nearer the midline/ median plane of the body
Intermediate Back muscles
Serratus posterior superior and inferior
Longissimus capitis - origin
Transverse process T1-T5

Serratus posterior inferior - action
depresses ribs
Spinalis capitis - origin
Spinous process C7
Splenius cervicis - insertion
Transverse processes C1-C2
Terms of Movement:
Lateral rotation
external rotation
Semispinalis capitis - insertion
area between superior and inferior nuchal lines of occip. bone
Obliquus capitis superior - nerve
suboccipital nerve
Minor deep layers of back muscles
Interspinales, Intertransversarii, Levatores costarum
Iliocostalis cervicis - insertion
Transverse process C4-C6
Superficial intrinsic back muscles
Splenius capitis and cervicis
longissimus - action
extends and laterally flexes trunk
Rectus capitis posterior major -nerve
Suboccipital nerve or dorsal ramus of cervical spinal nerve (C1)
Rhomboid minor - action
elevates medial border of scapula upward and medially
Rhomboid minor - nerve
Dorsal scapular nerve (C4-C5)













