Upper Extremity Muscle Innervations

Question 1

Sternocleidomastoid (SCM), Upper Trapezius, Middle Trapezius, and Lower Trapezius are all Innervation by what nerve?

Answer 1

Spinal Accessory (Cranial Nerve XI)

Question 2

Levator Scapulae and Rhomboids are innervated by what nerve?

Answer 2

Dorsal Scapular

Question 3

Serratus Anterior is innervated by what nerve?

Answer 3

Long Thoracic

Question 4

Pectoralis Minor is only innervated by what nerve?

Answer 4

Medial Pectoral

Question 5

Subclavius is directly innervated by what nerve?

Answer 5

Direct Branch from Brachial Plexus

Question 6

Supraspinatus, Infraspinatus, Subscapularis, and the Teres Major are all innervated by what nerve?

Answer 6

Suprascapular

Question 7

Teres Minor, Anterior Deltoid, Middle Deltoid, and Posterior Deltoid are all innervated by what nerve?

Answer 7

Axillary nerve

Question 8

Latissimus Dorsi is innervated by what nerve?

Answer 8

Thoracodorsal nerve

Question 9

Coracobrachilalis and Biceps Brachii are innervated by what nerve?

Answer 9

Musculocutaneous nerve

Question 10

Pectoralis Major (SH) is innervated by what 2 nerves?

Answer 10

Lateral & Medial Pectoral nerve

Question 11

Pectoralis Major (CH) is innervated by what nerve?

Answer 11

Lateral Pectoral nerve

Question 12

Triceps Brachii is innervated by what nerve?

Answer 12

Radial nerve