Skeletal Muscle Actions, Upper Body

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created 6 years ago by hoovemaa
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human anatomy
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1

frontals

raises eyebrows, wrinkles brows

2

zygomatic

raises lateral corners of the mouth

3

massetar

elevates mandible

4

temporalis

elevates mandible

5

sternocleidomastoid

flexes and or laterally rotates head

6

scalenes

elevates 1st two ribs, flexes and rotates neck

7

splenius

extends the head

8

iliocostalis

extend and laterally flex vertebral column

9

longissimus

extend and laterally flex vertebral column, extend and rotate head

10

spinalis

extends vertebral column

11

external intercostals

elevate rib cage for respiration

12

internal intercostals

depress rib cage for forced exhalation

13

diaphragm

inspiration-contracts to increase intra-abdominal pressure to force air into lungs

14

external oblique

flex vertebral column, rotation if done from 1 side

15

internal oblique

flex vertebral column, rotate if done from one side

16

transverse abdominus

compress abs

17

rectus abdominus

flex and rotate lumbar region

18

pectoralis major

protracts and rotates scapula downward

19

serratus anterior

rotates scapula upward

20

trapezius

stabilizes, elevates, retracts, and rotates scapula, extends the head

21

levator scapulae

elevates and adducts scapula

22

rhomboids

stabilize scapula

23

deltoid

abduction of the arm

24

latissimus dorsi

arm extension, also adduction and medial rotation

25

teres major

extends, medially rotates and adducts arm

26

subscapularis

medial arm rotation

27

suprascapularis

abducts arm

28

infraspinatus

lateral rotation of arm

29

teres minor

laterally rotates arm

30

tricep brachii

forearm extension

31

bicep brachii

forearm flexor

32

brachialis

forearm flexor

33

brachioradials

forearm flexor

34

pronator teres

pronates forearm

35

flexor carpi radialis

flexor of the hand

36

palmaris longus

tenses skin and palmar fascia

37

flexor carpi ulnaris

flex hand and adducts hand

38

flexor digitorum superfiscialis

flexes hand and middle phalanges of digits 2-5

39

flexor pollicis longus

flex distal phalanx of thumb

40

flexor digitorum profundus

flex distal interphalangeal joints

41

extensor carpi radialis longus

works with others to extend and abduct hand

42

extensor carpi radialis brevis

extend and adduct hand

43

extensor digitorum

extends fingers

44

extensor carpi ulnaris

extend and adduct hand

45

supinator

supinates arm

46

abductor pollicis longus

abduct and extend thumb

47

extensor pollicis longus and brevis

extends thumb

48

extendor indicis

extends index finger