LP 2: muscle attachments

Question 1

sternocleidomastoid o & i

Answer 1

o: manubrium, clavicle
i: mastoid process

Question 2

sternocleidomastoid action

Answer 2

move vertebral column, move and rotate head

Question 3

digastric o & i

Answer 3

o: mandible
i: hyoid

Question 4

digastric action

Answer 4

depress mandible, elevate hyoid during chewing/swallowing

Question 5

scalenes o & i

Answer 5

o: vertebral column
i: first and second ribs

Question 6

scalenes action

Answer 6

elevate 1st and 2nd ribs, flex and laterally bend the neck

Question 7

external intercostals o & i

Answer 7

o: ribs
i: rib immediately below

Question 8

external intercostals action

Answer 8

elevate ribs during forced respiration

Question 9

rectus abdominis o & i

Answer 9

o: pubic symphysis, pubic crest
i: xiphoid process, ribs

Question 10

rectus abdominis action

Answer 10

flex trunk anteriorly

Question 11

transverse abdominis o & i

Answer 11

o: ilium, ribs
i: linea alba, pubic crest, pubis

Question 12

transverse abdominis action

Answer 12

compress abdominal viscera during expiration
rotate trunk (ipsilateral)

Question 13

pectoralis major o & i

Answer 13

o: clavicle, sternum, ribs, rectus sheath
i: humerus

Question 14

pectoralis major action

Answer 14

adduction, internal rotation, flexion, extension, draw scapula anteroinferiorly

Question 15

trapezius o & i

Answer 15

o: occipital bone, vertebral column
i: clavicle, acromion, scapula

Question 16

trapezius action

Answer 16

stabilize and move scapula, extend neck

Question 17

latissimus dorsi o & i

Answer 17

o: ilium, ribs, vertebral column, scapula
i: humerus

Question 18

latissimus dorsi action

Answer 18

adduct, medially rotate, extend arm at glenohumeral joint

Question 19

deltoid o & i

Answer 19

o: clavicle, acromion, scapula
i: humerus

Question 20

deltoid action

Answer 20

arm abduction

Question 21

teres major o & i

Answer 21

o: scapula
i: humerus

Question 22

teres major action

Answer 22

extension and rotation of arm

Question 23

supraspinatus o & i

Answer 23

o: scapula
i: radius

Question 24

supraspinatus action

Answer 24

abduct arm and stabilize humerus head

Question 25

biceps brachii o & i

Answer 25

o: scapula i: radius

Question 26

biceps brachii action

Answer 26

flexion and supination of forearm

Question 27

brachialis o & i

Answer 27

o: humerus i: ulna

Question 28

brachialis action

Answer 28

flexion of elbow

Question 29

triceps brachii o & i

Answer 29

o: humerus, scapula i: ulna

Question 30

triceps brachii action

Answer 30

extension of forearm

Question 31

flexor carpi ulnaris o & i

Answer 31

o: humerus, ulna i: pisiform, hamate, metacarpal 5

Question 32

flexor carpi ulnaris action

Answer 32

wrist flexion and adduction

Question 33

extensor digitorum o & i

Answer 33

o: humerus i: extensor expansions of digits 2-5

Question 34

extensor digitorum action

Answer 34

finger extension

Question 35

sartorius o & i

Answer 35

o: ilium i: tibia

Question 36

sartorius action

Answer 36

flexion, external rotation, abduction of leg, flexion of knee, rotation of tibia

Question 37

gluteus maximum o & i

Answer 37

o: sacrum and coccyx, ilium i: iliotibial tract, femur

Question 38

gluteus maximus action

Answer 38

abduction, adduction, external rotation, extension if thigh

Question 39

rectus femoris o & i

Answer 39

o: femur, ilium i: patella, tibia

Question 40

rectus femoris action

Answer 40

leg extension

Question 41

gracilis o & i

Answer 41

o: pubis i: tibia

Question 42

gracilis action

Answer 42

thigh flexion and adduction, leg flexion and internal rotation

Question 43

biceps femoris o & i

Answer 43

o: pelvis, sacrotuberous ligament, femur i: fibula

Question 44

biceps femoris action

Answer 44

flexion and external rotation of leg and thigh, stabilize pelvis

Question 45

semitendinosus o & i

Answer 45

o: ischial tuberosity i: fibula

Question 46

semitendinosus action

Answer 46

leg flexion and internal rotation, thigh extension and internal rotation, stabilize pelvis

Question 47

tibialis anterior o & i

Answer 47

o: tibia, interosseous membrane i: medial cuneiform, metatarsal 1

Question 48

tibialis anterior action

Answer 48

foot dorsiflexion, foot inversion

Question 49

gastrocnemius o & i

Answer 49

o: femur i: calcaneous

Question 50

gastrocnemius action

Answer 50

plantarflexion of foot, leg flexion