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Extrinsic Back Muscles
attachments, innervation, and main action
5
Anatomy
Graduate
05/21/2013

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Cards

Term
Upper Trapezius
Proximal Attachment
Definition
External occipital protuberance, medial third of superior nuchal line, ligamentum nuchae, and spinous process C7
Term
Upper Trapezius
Distal Attachment
Definition
Lateral third of clavicle
Term
Upper Trapezius
Innervation
Definition
Accessory Nerve (CN XI)
Term
Upper Trapezius
Main Action
Definition
Elevation of scapula and shoulder, capital extension (head only), cervical extension, rotation of head to opposite size. Rotation of scapula so glenoid faces up (along with lower trap)
Term
Middle Trapezius
Proximal Attachment
Definition
Spinous process T1-T5
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