AP Lab Muscles 1

Question 1

lumbodorsal fascia

Answer 1

tough, white connective running down dorsal trunk

Question 2

latissimus dorsi

Answer 2

lumbodorsal fascia to armpit and inserts on humerus

-adduct and medially rotate the humerus

Question 3

External oblique

Answer 3

helps compress the abdomen and rotates vertebral column

Question 4

linea alba

Answer 4

aponeurosis (midventral line)

Question 5

Internal oblique

Answer 5

compress the abdomen and rotates the vertebral column

Question 6

transversus abdominus

Answer 6

compress abdomen and flexes vertebral column

Question 7

Multifidus spinae

Answer 7

arches/extends the back

Question 8

erector spinae

Answer 8

arches/extends the back in lateral (side to side) flexion

Question 9

Pectoantibrachialis

Answer 9

not on human

Question 10

pectoralis major

Answer 10

functions in the adduction and medial rotation of the arm

Question 11

xiphihumeralis

Answer 11

not on human

Question 12

pectoralis minor

Answer 12

protracts the scapula

Question 13

clavotrapezius

Answer 13

elevates and rotates the scapula medially

Question 14

acromiotrapizius

Answer 14

adducts the scapula

Question 15

spinotrapezius

Answer 15

depresses and rotates the scapula medially

Question 16

sternomastoid

Answer 16

flexes the neck laterally and rotates the head

Question 17

cleidomastoid

Answer 17

flexes the neck laterally and rotates the head

Question 18

levator scapulae

Answer 18

pulls the scapula cranially

Question 19

clavodeltoid

Answer 19

protracts the arm

Question 20

acromiodeltoid

Answer 20

abduct the upper arm

Question 21

spinodeltoid

Answer 21

retracts the arm

Question 22

triceps brachii

Answer 22

extends the antebrachium/forearm

Question 23

biceps brachii

Answer 23

flex the antebrachium/forearm

Question 24

brachialis

Answer 24

flex the forearm