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18 terms

Muscles 2

STUDY
PLAY
Superficial Muscle innervation
Posterior dorsal rami
Intermediate Muscle innervation
Posterior dorsal rami
Deep (transversospinalis) Muscles
Semispinalis, Semispinalis capitis, Multifidus
Semispinalis Origin
Transverse processes C4-T12
Semispinalis Insertion
Occipital bone, spinous processes
Semispinalis Function
Extend head, cervical and thoracic regions and rotate them to opposite sides
Semispinalis Capitis Origin
Transverse processes T1-T6
Semispinalis Capitis Insertion
Occipital bone, between superior and inferior nuchal lines
Semispinalis Capitis Function
Powerful rotator and extensor of head and neck
Multifidus Origin
Sacrum, ilium, and transverse processes C4-L5
Multifidus Insertion
Spinous processes
Multifidus Function
Stabilize vertebrae and rotate vertebral column to opposite side
Deep Muscle Innervation
Dorsal/Posterior Rami
Superficial Back Muscles
Quadratus lumborum
Superficial Back Muscle innervation
Anterior/Ventral Rami
Quadratus lumborum Origin
iliac crest and iliolumbar ligament
Quadratus lumborum Insertion
Transverse processes of L1-L4
Quadratus lumborum Function
Laterally flexes spine