| Question | Answer |
| Which muscles act in horizontal flexion of the humerus? | clavicular head of pec major, deltoid (ant) |
| which muscle(s) protract the scapula? | serratus anterior |
| which muscles retract the scapula? | trapezius (middle) and rhomboid major/minor |
| which muscles elevate the scapula? | trapezius (upper) and levator scapulae |
| Which muscles depress the scapula? | trapezius (lower fibers) |
| Which muscles origin is another muscles insertion? | deltoid and trapezius |
| Which muscles rotate the scapula upward? | serratus anterior, lower and upper trapezius |
| which muscles rotate the scapula downward? | rhomboid major, minor, levator scapulae |
| which muscles acts to medially rotate the humerus? | • Clavicular head of pectoralis major, latissimus dorsi, deltoid(ant), teres major and subscapularis |
| which muscles act to laterally rotate the humerus? | deltoid(post), supraspinatus, infraspinatus, teres minor |
| which muscles act to adduct the humerus? | latissimus dorsi, teres major and subscapularis |
| which muscles act to abduct the humerus? | deltoid(mid) and supraspinatus |
| Which muscle(s) receive cord contributions from C3? | levator scapulae and trapezius |
| which muscle(s) receive cord contributions from C4? | trapezius, levator scapulae, rhomboid major/minor, teres minor, supraspinatus |
| which muscle(s) receive cord contributions from C5? | levator scapulae, rhomboic major/minor, deltoid, subclavius, pec major(clav), teres minor, supraspinatus, serratus anterior |
| which muscle(s) receive cord contributions from C6? | subclavius, deltoid, pec major(clav), teres minor, supraspinatus, serratus anterior, teres major, pec minor, latissimus dorsi |
| which muscle(s) receive cord contributions from C7? | serratus anterior, teres major, pec. minor, latissimus dorsi, pec major(sternal) |
| which muscles receive cord contributions from C8? | pec. minor, latissimus dorsi, pec major(sternal) |
| which muscle(s) receive cord contributions from T1? | Pec major (sternal) |
| which muscle(s) does the long thoracic nerve innervate? | serratus anterior |
| Which muscle(s) do the ventral rami of C3-4 innervate? | trapezius and levator scapulae |
| which muscle(s) does the dorsal scapular nerve innervate? | rhomboid major, minor, and levator scapulae |
| which muscle(s) does the axillary nerve innervate? | deltoid, teres minor (and skin to upper arm) |
| which muscle(s) does the subscapular nerve innervate? | teres major(lower) and subscapularis(upper and lower) |
| which muscle(s) does the suprascapular nerve innervate? | supraspinatus and infraspinatus |
| which muscle(s) does the thoracodorsal nerve innervate? | latissimus dorsi |
