Deep/superficial back muscles

Question 1

serratus anterior

Answer 1

innervation: long thoracic nerve insertion: medial border of scapula origin: antero lateral aspect of 8-9 rib
blood supply: lateral thoracic nerve action: protraction, stabilization, scapular abduction, upward rotation

Question 2

erector spinae

Answer 2

innervation: dorsal rami insertion: cervical vertebrae T1, T2 origin: illiac crest, sacrum blood supply: lateral scapular artery action: spine extension, ipsilateral and contralateral rotation and side bending

Question 3

trapezius

Answer 3

innervation: spinal accessory nerve insertion: acromion process, scapular spine, lateral third of the clavicle. origin: occipital bone to T12 blood supply: transverse cervical artery action: elevation, depression, retraction, downward rotation of scapula

Question 4

rhomboid major

Answer 4

innervation: dorsal scapular nerve insertion: medial border of inferior scapular spine origin: T2-T5 blood supply: dorsal scapular artery action: retraction and downward rotation, scapular stabilization

Question 5

rhomboid minor

Answer 5

innervation: dorsal scapular nerve insertion: C7-T1 spinous process, insertion : medial border next to scapular spine. blood supply: dorsal scapular artery action: retraction and downward rotation, scapular stabilization

Question 6

levator scapulae

Answer 6

innervation: dorsal scapular nerve insertion: superior angle of the medial border of the scapula. origin: transverse process of C1- C4 blood supply: dorsal scapular artery, action: elevation of scapula

Question 7

Latissimus dorsi

Answer 7

innervation: thoracodorsal nerve , insertion: intertubercular sulcus of the humerus, origin: T7-T12 and illiac crest blood supply: thoracodorsal artery action: internal rotation, adduction, extension of the arm