Back I

Question 1

The back muscle is divided into ?

Answer 1

Extrinsic and intrinsic muscle

Question 2

What are the 5 Extrinsic muscle

Answer 2

-Trapezius
-Latissimus Dorsi
-Rhomboid minor &major
-Levator scapulae
-Posterior, superior, inferior - serratus

Question 3

Origin, nerve, Trapezius muscle

Answer 3

Start from occipital bone extends to C1- T12,continues to the scapula (posterior shoulder)
Cranial nerve XI (assesory nerve)

Question 4

Origin, nerve of Latissimus Dorsi muscle

Answer 4

spines of T7-L5, to iliac crest thoracolumbar fascia, inferior 3-4 ribs. largest muscle of the body
Nerve- thoracodorsal nerve

Question 5

Latissimus dorsi innervates what nerve

Answer 5

thoracodorsal nerve

Question 6

Origin, nerve of Rhomboid minor and major

Answer 6

rhomboid minor from C7 &T1; rhomboid major from T2-T5).

Question 7

Rhomboid minor and major innervates what nerve

Answer 7

dorsal scapula

Question 8

Levator Scapulae innervates what nerve

Answer 8

transverse process of c1-c4
Nerve: dorsal scapular

Question 9

Posterior superior sarratus innervates what nerve and what is the function

Answer 9

Ventral rami (uper thorax)
elevates ribs

Question 10

Posterior inferior serratus innervates what nerve and what is the action

Answer 10

Ventral rami (lower thorax)
Depresses ribs

Question 11

elevates, retracts and superiorly rotates scapula to face the glenoid cavity skyward (needed for full aBduction of the arm); can also depress the scapula

Answer 11

Trapezius muscle

Question 12

adducts, extends and medially rotates the humerus (e.g. picture the power stroke of swimming)

Answer 12

Latissimus Dorsi

Question 13

elevates scapula (or inclines neck if scapula is fixed)

Answer 13

Levator scapulae

Question 14

adduct and rotate and retract scapula

Answer 14

Rhomboid minor and major