| 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 |
