origin - ligamentum nuchae, C7-T1insertion - medial border of scapula at spineinnervation - dorsal scapular nerveblood supply - dorsal scapular artery or deep branch transverse cervical arteryaction - fixes scapula to thoracic wall and retracts and rotates to depress glenoid cavity

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1.
origin - ligamentum nuchae, C7-T1

insertion - medial border of scapula at spine

innervation - dorsal scapular nerve

blood supply - dorsal scapular artery or deep branch transverse cervical artery

action - fixes scapula to thoracic wall and retracts and rotates to depress glenoid cavity