The dorsal scapular nerve arises from the brachial plexus, usually from the plexus root (anterior/ventral ramus) of C5.
It provides motor innervation to the rhomboid muscles, which pull the scapula towards the spine and levator scapulae muscle, which elevates the scapula.
Injury to this nerve is usually apparent when the scapula on one side is located farther from the midline. Once the nerve leaves C5 it commonly pierces the middle scalene muscle, and continues deep to levator scapulae and the rhomboids. It is accompanied by the one of two arteries. Either the dorsal scapular artery (the only artery that comes off of the third part of subclavian when present, although its origin is highly variable in different people) or when the dorsal scapular artery is absent, it is accompanied by the deep branch of the transverse cervical artery (an artery coming off of the thyrocervical trunk, a branch of the first part of the subclavian artery, the other two branches being vertebral artery and internal thoracic artery).
Other articles related to "nerve, nerves":
... Muscle Origin Insertion Artery Nerve Action Antagonist trapezius down the midline, from the external occipital protuberance, the nuchal ligament, the medial part of the ... Cervical nerves C3 and C4 receive information about pain in this muscle Descending (superior) part elevates ascending (inferior) part depresses and middle part (or all parts together) retracts scapula ... Serratus anterior muscle Muscle Origin Insertion Artery Nerve Action Antagonist rhomboid major spinous processes of the T2 to T5 vertebrae medial border of the scapula, inferior to the ...
Famous quotes containing the word nerve:
“Social questions are too sectional, too topical, too temporal to move a man to the mighty effort which is needed to produce great poetry. Prison reform may nerve Charles Reade to produce an effective and businesslike prose melodrama; but it could never produce Hamlet, Faust, or Peer Gynt.”
—George Bernard Shaw (18561950)