Back Muscles

Question 1

Trapezius

Answer 1

Function: elevation, retraction, depression of scapula, rotation of glenoid fossa superiorly

Question 2

Latissimus Dorsi

Answer 2

function: extension, adduction, medial/internal rotation of humerus; lifts body toward arm in climbing

Question 3

Levator Scapulae

Answer 3

Function: elevates the scapula and rotates the scapula to depress the glenoid cavity

Question 4

Rhomboid major and minor

Answer 4

Function: retract the scapula, rotate the scapula to depress the gleaned cavity and hold the scapula close to the thoracic wall.

Question 5

Serratus posterior superior

Answer 5

elevation of ribs

Question 6

Serratus posterior inferior

Answer 6

depression of ribs

Question 7

Splenius capitus and cervicis

Answer 7

unilateral contraction yeilds lateral flexion of neck and rotation of head to side of contraction

Question 8

Erector Spinae: iliocstalis, longissimus, spinalis

Answer 8

unilateral contraction yields lateral felxion, bilateral contraction yeild extension

Question 9

Semispinalis cervivis and capitus

Answer 9

extension of the vertebral column (cervicis) and head (captious)

Question 10

Multifundus

Answer 10

unilateral contraction rotates to contralateral side, stabilizes vertebrae