Lateral Muscles of the Spine

Lateral Muscles of the Spine - Quadratus Lumborum crest of...

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Lateral Muscles of the Spine MUSCLE FROM TO ACTION Scalenes (3 -anterior, posterior, medial.) first two ribs transverse processes of cervical vertebrae Acting together they flex the cervical spine; unilaterally they act in lateral flexion; they also elevate the ribs during inspiration. Sternocleido-mastoid two heads - top of sternum and medial 1/3 of clavicle mastoid process of temporal bone and adjacent portion of occipital bone Together they act to flex the cervical spine; unilaterally they act in lateral flexion and rotation to the opposite side. Levator Scapulae transverse processes of the first four cervical vertebrae vertebral border of scapula between the medial angle and the scapular spine When the scapula is fixed - unilaterally it flexes the cervical spine laterally; bilaterally there is no movement but it acts to stabilize the neck.
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Unformatted text preview: Quadratus Lumborum crest of ilium and iliolumbar ligament lower border of the 12 th rib and transverse processes of the upper four lumbar vertebrae This is a flat muscle; bilaterally it stabilizes the pelvis and lumbar spine; unilaterally it acts in lateral flexion of the lumbar spine. Psoas sides of bodies and intervertebral cartilage of T12 & L1-L5; front and lower borders of transverse processes of lumbar vertebrae lesser trochanter of femur and medial border (short distance along) of shaft Primarily a hip flexor; there is some confusion as to whether it flexes or hyper-extends the lumbar spine; it is most likely that it acts to stabilize the spine (like a guy wire) when it acts in a bilateral fashion; acting unilaterally it helps with lateral flexion....
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This note was uploaded on 09/25/2010 for the course EXS 31757 taught by Professor Brennan during the Spring '10 term at Oakland University.

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Lateral Muscles of the Spine - Quadratus Lumborum crest of...

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