1. MAJOR Skeletal Muscles of the Human Body

2. FRONTALIS

4. Raises forehead & eyebrows; wrinkles forehead (horizontally)

5. MASSETER

7. Elevates mandible

8. TEMPORALIS

10. Closes jaw elevates and retracts mandible (as in chewing)

11. ORBICULARIS OCULI

13. Shopw Blinking, squinting, and draws eyebrows inferiorly LJKLJK KLJKLJ K

14. ORBICULARIS ORIS

16. Closes lips; purses and protrudes lips; kissing & whistling muscle

17. BUCCINATOR

19. Draws corners of mouth laterally; compresses cheek when sucking/whistling; holds food between teeth when chewing

20. ZYGOMATICUS

22. Smiling muscle; raises lateral corners of mouth upward

23. STERNOCLEIDO- MASTOID

25. Flexes head; helps lift head when lying down; tilts head to side

26. SPLENIUS

28. Together: extend/hyperextend the head; Separate: Rotate and tilt head to one side

29. TRAPEZIUS

31. Elevates, retracts, depresses and rotates shoulder

32. LATISSIMUS DORSI

34. Extends & adducts arm; depresses shoulder; allows movements such as striking, hammering, swimming, rowing, pull-up

35. DELTOID

37. Abducts arm; swings arms while walking

38. PECTORALIS MAJOR

40. Flexes arm; adducts arm against resistance; pulls ribcage upward; allows movements for climbing, throwing, pushing, and forced inhaling

41. BICEPS BRACHII

43. Flexes elbow joint; supinates forearm Example: open a bottle of wine, turn the corkscrew and pull cork

44. TRICEPS BRACHII

46. Extends forearm with or without resistance; reaching

47. RECTUS ABDOMINUS

49. Flex and rotate lumbar region; stabilize pelvis during walking

50. EXTERNAL OBLIQUE

52. Together: Help rectus abdominus to flex vertebral column (bending over/back) Separate: Help to rotate trunk and lateral flexion

53. GLUTEUS MAXIMUS

55. Extends thigh; when thigh is flexed, helps us to climb stairs or run; laterally rotates and abducts thigh

56. RECTUS FEMORIS

58. Extends knee and flexes thigh at hip

59. GRACILIS

61. Adducts thigh; flexes and medially rotates thigh; flexes knee

62. SARTORIUS

64. Flexes, abducts, and laterally rotates thigh; “tailor’s muscle” = sitting cross-legged

65. BICEPS FEMORIS

67. Extends thigh and flexes knee; laterally rotates leg

68. GASTROCNEMIUS

70. Plantar flexes foot when knee is extended

71. TIBIALIS ANTERIOR

73. Dorsiflexion of foot; inverts foot

74. FIBULARIS LONGIS

75. Ghgfhgfh Sfs

76. Plantar flexes and everts foot; helps keep flat foot on ground