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Human Anatomy: Muscle Groups

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Human Anatomy



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Muscle Function & Other Pertinent Medical Information
- STERNOCLEIDOMASTOID -
ORIGIN: Anterior and superior manubrium and superior medial third of clavicle
INSERTION: Lateral aspect of mastoid process and anterior half of superior nuchal line
ACTION: Flexes and laterally rotates cervical spine. Protracts head when acting together . Extends neck when neck already partially extended
NERVE: Spinal accessory nerve (lateral roots C1-5)













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