Origins, Insertions & Actions

Question 1

masseter origin

Answer 1

zygomatic arch

Question 2

masseter insertions

Answer 2

lateral ramus and angle of mandible

Question 3

masseter action

Answer 3

elevates mandible

Question 4

sternocleidomastoid origins

Answer 4

manubrium of sternum and sternal end of clavicle

Question 5

sternocleidomastoid insertions

Answer 5

mastoid process, temporal, superior nuchal line, occipital

Question 6

sternocleidomastoid action

Answer 6

lateral rotation of the neck

Question 7

pectoralis major origins

Answer 7

ribs 2-6, body of sternum, sternal end of clavicle

Question 8

pectoralis major insertion

Answer 8

intertubercular groove of the humerus

Question 9

pectoralis major action

Answer 9

adducts arm

Question 10

deltoid origin

Answer 10

acromial end of clavicle and acromion and spine of scapula

Question 11

deltoid insertion

Answer 11

deltoid tuberosity of humerus

Question 12

deltoid action

Answer 12

rotates shoulder

Question 13

coracobrachialis origin

Answer 13

coracoid process of scapula

Question 14

coracobrachialis insertion

Answer 14

midshaft of humerus

Question 15

coracobrachialis action

Answer 15

flexes arm

Question 16

brachialis origin

Answer 16

anterior shaft of humerus

Question 17

brachialis insertion

Answer 17

coronoid process of ulna

Question 18

brachialis action

Answer 18

flexes elbow

Question 19

brachioradialis origin

Answer 19

lateral supracondylar ridge of the humerus

Question 20

brachioradialis insertion

Answer 20

styloid process of the radius

Question 21

brachioradialis action

Answer 21

flexes elbow

Question 22

extensor digitorum origin

Answer 22

lateral epicondyle of the humerus

Question 23

extensor digitorum insertion

Answer 23

phalanges 2-5

Question 24

extensor digitorum action

Answer 24

extends phalanges 2-5

Question 25

pronator teres origin

Answer 25

medial epicondyle of the humerus, coronoid process of the ulna

Question 26

pronator teres insertion

Answer 26

mid-lateral shaft of radius

Question 27

pronator teres action

Answer 27

pronates forearm

Question 28

gluteus maximus origin

Answer 28

ilium, sacrum, coccyx

Question 29

gluteus maximus insertion

Answer 29

gluteal tuberosity of the femur

Question 30

gluteus maximus action

Answer 30

laterally rotates thigh/hip

Question 31

rectus femoris origin

Answer 31

anterior inferior iliac spine, superior margin of the acetabulum

Question 32

rectus femoris insertion

Answer 32

tibial tuberosity

Question 33

rectus femoris action

Answer 33

extends knee

Question 34

sartorius origin

Answer 34

anterior superior iliac spine

Question 35

sartorius insertion

Answer 35

tibial tuberosity

Question 36

sartorius action

Answer 36

flexes knee

Question 37

semitendinosus origin

Answer 37

ischial tuberosity

Question 38

semitendinosus insertion

Answer 38

medial condyle tibia

Question 39

semitendinosus action

Answer 39

flexes knee

Question 40

gastrocnemius origin

Answer 40

lateral/medial condyles of femur

Question 41

gastrocnemius insertion

Answer 41

calcaneus

Question 42

gastrocnemius action

Answer 42

plantar flexion (extension) foot

Question 43

tibialis anterior origin

Answer 43

lateral tibia

Question 44

tibialis anterior insertion

Answer 44

1st metatarsal, cuneiform bone

Question 45

tibialis anterior action

Answer 45

dorsiflexes (flexion) foot