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Question 0

Erector Spinae

Answer 0

Acting bilaterally: extend vertebral column and head; as back is flexed, control movement by gradually lengthening
Unilaterally: laterally flex vertebral column

Question 1

Splenius

Answer 1

Acting alone: laterally flex neck and rotate ipsilaterally

Acting together: extend head and neck

Question 2

Semispinalis

Answer 2

extends head and thoracic and cervical regions of vertebral column and rotates them contralaterally

Question 3

Multifidus

Answer 3

Unilateral contraction rotates to contralateral side; stabilizes vertebrae during local movements of vertebral column

Question 4

Rotatores

Answer 4

Proprioception; possibly stabilize vertebrae and assist with local extension and rotatory movements of vertebral column

Question 5

Trapezius

Answer 5

elevates, depresses, and retracts scapulae; descending and ascending parts work together to rotate glenoid cavity superiorly

Question 6

Latissimus dorsi

Answer 6

Extends, adducts, and medially rotates shoulder joint; raises body towards arms during climbing

Question 7

Levator Scapulae

Answer 7

Elevates scapula and tilts glenoid cavity inferiorly by rotating scapula

Question 8

Rhomboids

Answer 8

Retract scapula and rotate it to depress glenoid cavity; fix scapula to thoracic wall

Question 9

Anterior Scalene

Answer 9

Flexes neck laterally; elevates 1st rib during forced inspiration

Question 10

Middle Scalene

Answer 10

Fixes neck laterally; elevates 1st rib during forced inspiration

Question 11

Posterior Scalene

Answer 11

Flexes neck laterally; elevates 2nd rib during forced inspiration