origin/insertion of important muscles

Question 1

masseter muscle origin

Answer 1

zygomatic bone and maxilla

Question 2

masseter muscle insertion

Answer 2

mandible

Question 3

masseter muscle action

Answer 3

elevation of mandible (forced closure)

Question 4

sternocleidomastoid origin

Answer 4

manubrium and clavicle

Question 5

sternocleidomastoid insertion

Answer 5

mastoid process

Question 6

sternocleidomastoid action

Answer 6

flexes and rotates cervical vertebrae

extends neck

Question 7

deltoid origin

Answer 7

clavicle, acromion, spine of scapula

Question 8

deltoid insertion

Answer 8

humerus

Question 9

deltoid action

Answer 9

abducts arm
rotates
extends

Question 10

diaphragm origin

Answer 10

internal surface of ribcage and sternum, costal cartilages, last 6 ribs, and lumbar vert

Question 11

diaphragm insertion

Answer 11

central tendon

Question 12

diaphragm action

Answer 12

prime mover of inspiration

flattens on contraction

Question 13

biceps brachii origin

Answer 13

coracoid process and upper region of glenoid fossa

Question 14

biceps brachii insertion

Answer 14

radius and ulna

Question 15

biceps brachii action

Answer 15

supinates forearm
flexes elbow
weakly flexes shoulder

Question 16

biceps femoris origin

Answer 16

femur and ischium

Question 17

biceps femoris insertion

Answer 17

tibia and fibula

Question 18

biceps femoris action

Answer 18

flex and rotate knee

extend hip

Question 19

rectus femoris origin

Answer 19

ilium

Question 20

rectus femoris insertion

Answer 20

patella and tibia

Question 21

rectus femoris action

Answer 21

extends leg at knee

flexes thigh at hip

Question 22

brachioradialis origin

Answer 22

humerus

Question 23

brachioradialis insertion

Answer 23

styloid process of radius

Question 24

brachioradialis action

Answer 24

flexes arm at elbow

Question 25

gluteus maximus origin

Answer 25

ilium, sacrum, coccyx

Question 26

gluteus maximus insertion

Answer 26

femur and tibia

Question 27

gluteus maximus action

Answer 27

extends and rotates hip

maintains knee extended

Question 28

sartorius origin

Answer 28

ilium

Question 29

sartorius insertion

Answer 29

tibia

Question 30

sartorius action

Answer 30

flexes, abducts, and rotates thigh at hip

flexes and rotates leg at knee

Question 31

gastrocnemius origin

Answer 31

femur

Question 32

gastrocnemius insertion

Answer 32

calcaneus

Question 33

gastrocnemius action

Answer 33

plantar flexes foot

flexes knee

Question 34

external intercostals origin

Answer 34

inferior border of rib above

Question 35

external intercostals insertion

Answer 35

superior border of rib above

Question 36

external intercostals action

Answer 36

pull ribs towards one another to elevate rib cage

Question 37

internal intercostals origin

Answer 37

superior border of rib above

Question 38

internal intercostals insertion

Answer 38

inferior border of rib above

Question 39

internal intercostals action

Answer 39

draw ribs together

depress rib cage