ANATOMY origin/insertion

Question 1

buccinator

Answer 1

origin = maxilla and mandible
insertion = orbicularis oris
action = compress cheek (whistling)

Question 2

massester

Answer 2

origin = temporal process of the zygomatic
insertion = mandible rombus
action = elevates jaw

Question 3

sternocleidomastoid

Answer 3

origin = sternum and clavicle
insertion = mastoid proces
action = flex and rotate head

Question 4

external intercostals

Answer 4

origin = inferior border of superior rib
insertion = superior border of inferior rib
action = elevates rib cage

Question 5

internal intercostals

Answer 5

origin = superior border of inferior rib
insertion = inferior border of superior rib
action = depresses rib cage

Question 6

diaphragm

Answer 6

origin = xiphoid process and lower ribs
insertion = central tendon
action = enlarges thorracic cavity

Question 7

external oblique

Answer 7

origin = lower 8 ribs
insertion = linea alba and pubic crest
action = compress abdomen

Question 8

deltoid

Answer 8

origin = clavicle and spine/ acromion of scapula
insertion = deltoid tuberosity
action = abduct arm

Question 9

pectoralis major

Answer 9

origin = clavicle/sternum/costal cartliages
insertion = below greater tubercle of humerus
action = adduct and flex arm

Question 10

transverse abdominus

Answer 10

origin = iliac crest and lower ribs
insertion = linea alba
action = compress abdomen

Question 11

latissimus dorsi

Answer 11

origin = iliac crest and spine
insertion = intertubecular groove of humerus
action = adduct and extend arm

Question 12

triceps brachii

Answer 12

origin = humerus and scapula
insertion = olecranon process of the ulna
action = extend forearm

Question 13

pectoralis minor

Answer 13

origin = ribs
insertion = coracoid process of scapula
action = draw scapulaf orward and down

Question 14

biceps brachii

Answer 14

origin = scapula coracoid process
insertion = radial tuberosity
action = flex forearm

Question 15

internal oblique

Answer 15

origin = iliac crest
insertion = linea alba and pubic crest
action = compress abdomen

Question 16

extensor carpi radialis longus

Answer 16

action = extend and abduct wrist

Question 17

extensor carpi ulnaris

Answer 17

action = extend and adduct wrist

Question 18

flexor carpi radialis

Answer 18

action = flex and abduct wrist

Question 19

flexor carpi ulnaris

Answer 19

action = flex and adduct wrist

Question 20

scalenes

Answer 20

origin = cervical vertebrae
insertion = ribs 1 and 2
action = elevates ribs and rotates neck

Question 21

splenius

Answer 21

origin = spinous process of cervical spine
insertion = mastoid process of temporal/occipital
action = extend head