muscles for lab exam 2

Question 1

frontalis

Answer 1

frowns eyebrows
O: frontal bone
I: skin of frontal bone

Question 2

occipitalis

Answer 2

retracts scalp
O: epicranial aponeurosis
I: skin of the back of the neck

Question 3

orbicularis oculi

Answer 3

closes eyes
O: lacrimal bone
I: skin of the orbit

Question 4

orbicularis oris

Answer 4

purses lips
O: maxilla and mandible
I: skin of the lips

Question 5

masseter

Answer 5

closes jaw
O: zygomatic arch
I: angle of mandible/ramus of mandible

Question 6

temporalis

Answer 6

closes jaw
O: temporal bone
I: coronoid process of mandible

Question 7

sternocleidomastoid

Answer 7

flexion of the neck
O: sternum and clavicle
I: mastoid process of temporal bone

Question 8

deltoid

Answer 8

abduction of shoulder joint
O: spine of scapula
I: deltoid tuberosity

Question 9

pectoralis major

Answer 9

extension of shoulder joint
O: 2/3 of clavicle
I: inner lip of intertubercular groover

Question 10

trapezius

Answer 10

shrugging of shoulder
O: ligamentum nuchae
I: upper part of spine

Question 11

latissmus dorsi

Answer 11

rowing
O: ribs 8-12
I: intertubercular groove of humerus

Question 13

serratus anterior

Answer 13

Keeps scapula close to chest
O: ribs
I: medial border of scapula

Question 14

biceps brachii

Answer 14

flexion of elbow joint
O: long head - supra glenoid tubercle
I: radial tuberosity

Question 15

triceps brachii (posterior)

Answer 15

extension of elbow joint
O: infraglenoid tubercle
I: olecranon process

Question 16

brachialis

Answer 16

flexion at elbow (between bi and triceps)
O: anterior surfaces of humerus
I: ulnar tuberosity

Question 17

brachioradialis

Answer 17

flexion at elbow joint
O: lateral epicondyle
I: lateral aspect of styloid process of the radius

Question 18

flexor carpi ulnaris

Answer 18

flexion of the wrist
o: medial epicondyle of humerus
i: ulnar side of carpal bones

Question 19

flexor carpi radialis

Answer 19

flexor at wrist
o: medial epicondyle of humerus
i: radial side of carpal bones

Question 20

flexor digitorium superficialis

Answer 20

flexion of proximal interphalngeal joints
o: medial epicondyle of humerus
i: sides of middle phalanges 2-5

Question 21

diaphragm

Answer 21

inhalation/inspiration
o: ribs and spine
i: central tendon of diaphragm

Question 22

external intercostal

Answer 22

elevates the ribs
o: lower surface of upper rib
i: upper surface of lower rib

Question 23

internal intercostal

Answer 23

depressed the rib cage

Question 24

rectus abdominis

Answer 24

flexes the lumbar spine
o: pubic symphysis
i: xiphoid process of sternum

Question 25

external oblique

Answer 25

compresses abdomen
O: External surfaces of ribs 5-12
I: linea alba

Question 26

internal oblique

Answer 26

compressed abdomen

Question 27

gluteus maximus

Answer 27

extension of hip
o: iliac crest
i: iliotibial tract

Question 28

gluteus medius

Answer 28

extension of thigh / medial rotator
o: posterior side of illium
I: femur

Question 29

rectus femoris (quads)

Answer 29

extension of knee
insertion; patella and tibial tuberosity

Question 30

vastus medialis

Answer 30

extension of knee
insertion: patella and tibial tuberosity

Question 31

vastus lateralis

Answer 31

extension of knee
insertion: patella and tibial tuberosity

Question 32

vastus intermedius

Answer 32

extension of knee
i: tibial tuberosity

Question 33

sartorius

Answer 33

flexion of knee
o: anterior superior iliac spine
i; medial side of tibial tuberosity

Question 34

gastrocnemius

Answer 34

plantar flexion
i: achilles tendon of calcaneus bone

Question 35

soleus

Answer 35

plantar flexion
i: achilles tendon of calcaneus bone