Muscles-4 Upper Limb

Question 1

In compartment syndrome, when do nerves begin to die? When do muscles begin to die? What in urine indicates muscle death?

Answer 1

2-4 hours for nerves, 6 hours for muscle. Myoglobin in Urine.

Question 2

What are the two muscles of the Anterior pectoral girdle?

Answer 2

Pec Minor and Serratus anterior

Question 3

Which pectoral girdle muscle is deinnervated often during a mastectomy procedure?

Answer 3

Serratus Anterior

Question 4

What are the three muscles of the posterior pectoral girdle?

Answer 4

Trapezius, Levator Scapulae, Rhomboidus (Major&Minor)

Question 5

How many muscles act on the Humerus?

Answer 5

9!

Question 6

Which shoulder muscle allows movement of the arm above the shoulder? Hint: Most frequently injured shoulder muscle..

Answer 6

SupraSpinatus

Question 7

What are the 4 rotator cuff muscles? Hint:SITS!!

Answer 7

Supraspinatus, Infraspinatus, Teres Minor, Subscapularis

Question 8

Which TENDON of the rotator cuff is injured most easily?

Answer 8

SupraSpinatus Tendon

Question 9

What are the two flexors of the elbow? What is the one extensor?

Answer 9

Flexor: Brachialis & Biceps Brachii Extensor: Triceps Brachii

Question 10

What is the main mover in forearm Protination? What is an accessory mover?

Answer 10

Prime Mover: Pronator Quadratus Assists:Pronator Teres