GROSS ANATOMY

Detailed explanation-1: -The DSN is a motor nerve that innervates the levator scapulae, rhomboid major, and rhomboid minor muscles.

Detailed explanation-2: -The dorsal scapular nerve branches from the ventral ramus of C5 and descends from the cervical region down to the medial border of the scapula. It innervates three muscles: the levator scapulae, the rhomboid major, and the rhomboid minor.

Detailed explanation-3: -The levator scapulae muscle is innervated by the dorsal scapular nerve C5 and branches of C6. The sternoclavicular joint is supported anteriorly by the costoclavicular ligament. The origin of the rhomboid muscles is the spinous processes of the last cervical and the first seven thoracic vertebrae.

Detailed explanation-4: -Dorsal Scapular Nerve is the branch of brachial plexus, arising from ventral ramus of C5 root. It is a motor nerve which arising from C5 root, pierce the middle scalene muscle, coursing deep to and supplying levator scapulae and the rhomboid muscles.

Detailed explanation-5: -Nerve Supply The levator scapulae is innervated by cervical nerve (C3-C4) and dorsal scapular nerve (C5).