Muscles of Shoulder and Function

Question 1

-Elevates the scapula

-Rotates scapula during
ABduction the humerus

-innervated by spinal accessory nerve

Answer 1

Trapezius

Question 2

• Major abductor of arm (abducts arm beyond 15 degrees)

- innervated by axillary nerve

Answer 2

Deltoid

Question 3

• Elevates scapula

- innervated by anterior rami of C3 and C4 and dorsal scapular nerve (C5)

Answer 3

Levator scapulae

Question 4

• Elevates and Retracts Scapula

- innervated by dorsal scapular nerve (C4, C5)

Answer 4

Rhomboid major and minor

Question 5

Shrugging shoulders against resistance tests what muscle of the shoulder?

Answer 5

Trapezius

Question 6

What muscles are components of the rotator cuff, which stabilizes the glenohumeral joint?

Answer 6

supraspinatus, infraspinatus, teres minor

Question 7

• Rotator cuff muscle
• initiation of abduction of arm to 15 degrees at glenohumeral joint
• innervated by suprascapular nerve (C5,C6)

Answer 7

Supraspinatus muscle

Question 8

• Rotator cuff muscle
• lateral rotation of arm of
• innervated by suprascapular nerve (C5,C6)

Answer 8

infraspinatus

Question 9

• Rotator cuff muscle
• lateral rotation of arm
• innervated by axillary nerve (C5,C6)

Answer 9

Teres Minor Muscle

Question 10

• Medial rotation and extension of the arm

- innervated by inferior subscapular nerve(C5, C6, C7)

Answer 10

Teres major

Question 11

• Extension of forearm at elbow joint
• accessory ADDuctor and extensor of the arm at glenohumeral joint
• innervated by radial nerve (C6, C7, C8)

Answer 11

Long head of triceps brachii