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Deep Back Muscles
OINA's according to Dr. Pierson at SIUC
24
Anatomy
Graduate
10/21/2010

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Cards

Term
Origin of Erector Spinae
Definition
Arises by a broad tendon from posterior part of iliac crest, posterior surface of sarum, sacral and inferior lumbar spinous processes, and suprspinous ligament
Term
Insertion of Erector Spinae
Definition

Iliocostalis: lumborum, thoracis, and cervicis- fibers run superiorly to angles of lower ribs and cervical transvers processes

Longissimus: thoracis, cervicis, and capitis- fibers run superiorly to ribs between tubercles and angles, to transverse processes in thoracic and cervical regions, and to mastoid process of temporal lobe

Spinais: thoracis, cervicis, and capitis- fibers run superomedially to occipital bone ans spinous processes in the upper thoracic region and to skull

Term
Innervation of Erector Spinae
Definition
Dorsal rami of spinal nerves
Term
Action of Erector Spinae
Definition

Acting bilaterally, they extend vertebral column and head; as back is flexed they control movement by gradually lengthening their fibers

Acting unilaterally, they laterally bend vertebral column

Term
Origin of Semispinalis
Definition
Arises from transverse processes of C4-T12 vertebrae
Term
Insertion of Semispinalis
Definition
Thoracis, cervicis and capitis: fibers run superomedially to occipital bone and spinous processes in thoracic and cervical regions
Term
Innervation of Semispinalis
Definition
Dorsal rami of spinal nerves
Term
Action of Semispinalis
Definition
Extend head and thoracic and cervical regions of vertebral column and rotate them countralaterally
Term
Origin of Multifidus
Definition
Arises from sacrum and illium, transverse processes of T1-T3, and articular processes of C4-C7
Term
Insertion of Multifidis
Definition
Fibers pass superomedially to spinous processes of vertebrae above, spanning 2-4 segments
Term
Innervation of Multifidis
Definition
Dorsal rami of spinal nerves
Term
Action of Multifidis
Definition
Stabilizes vertebrae during local movements of vertebral column
Term
Origin of Rotatores
Definition
Arise from transverse processes of vertebrae; are best developed in the thoracic region
Term
Insertion of Rotatores
Definition
Pass superomedially to attach to junction of lamina and transverse process, or spinous process, of vertebrae above their origin, spanning 1-2 segments
Term
Innervation of Rotatores
Definition
Dorsal rami of spinal nerves
Term
Action of Rotatores
Definition
Stabilize vertebrae and assist with local extension and rotary movements of vertebral column; may function as organs of proprioception
Term
Origin of Interspinales
Definition
Superior surfaces of spinous processes of cervical and lumbar vertebrae
Term
Insertion of Interspinales
Definition
Inferior surface of spinous processes of vertebrae superior to vertbrae of origin
Term
Innervation of Interspinales
Definition
Dorsal rami of spinal nerves
Term
Action of Interspinales
Definition
Aid in extension and rotation of vertebral column
Term
Origin of Intertransversarii
Definition
Transverse processes of cervical and lumbar vertebrae
Term
Insertion of Intertransversarii
Definition
Transverse processes of adjacent vertebrae
Term
Innervation of Intertransversarii
Definition
Dorsal and ventral rami of spinal nerves
Term
Action of Intertransversarii
Definition
Aid in lateral bending of vertebral column; acting bilaterally, they stabilize vertebral column
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