The Back

Question 1

Muscles in superficial layer of back?

Answer 1

Trapezius and lattisimus dorsi

Question 2

Muscles in deep layer of back?

Answer 2

Lavator scapulae, Rhomboideus minor & Rhomboideus major

Question 3

Motor nerve supply of trapezius?

Answer 3

Spinal accessory nerve

Question 4

Sensory nerve supply of trapezius?

Answer 4

C3, 4

Question 5

Action of upper fibers of trapezius?

Answer 5

Elevate scapula

Question 6

Action of lower fibers of trapezius?

Answer 6

Depress scapula

Question 7

Action of middle fibers of trapezius?

Answer 7

Retract scapula

Question 8

Action of upper fibers of trapezius?

Answer 8

With serratus anterior gives rotation of scapula during raising arm above 90 degrees

Question 9

Nerve supply of Latissimus dorsi?

Answer 9

Thoracic-dorsal nerve (nerve to latissimus dorsi)

Question 10

Action of latissimus Dorsi

Answer 10

Adduction, extension and medial rotation of arm
It shares in all violent expiratory movements
If insertion is fixed, raises the trunk as in climbing

Question 11

What is the motor nerve supply of lavator scapulae

Answer 11

Dorsal scapular

Question 12

What is the sensory nerve supply of elevator scapulae

Answer 12

C3, 4

Question 13

Action of levator scapulae?

Answer 13

Elevation and retraction of scapula

Question 14

Nerve supply of Rhomboideus minor and major

Answer 14

Dorsal capsular nerve

Question 15

Action of Rhomboidus minor and major

Answer 15

Retraction & downward rotation of the scapula

Question 16

Action of Rhomboidus minor and major

Answer 16

Retraction & downward rotation of the scapula