1. Anatomy
Muscles

2. Muscles of the Hip 1. Iliacus 2. Psoas Major 7. Gluteus minimus
8. Gluteus medius
10. Gluteus maximus

3. 1. Iliacus Origin – Iliac Insertion – tendon of Psoas
Action – Hip flexion, (with Psoas major)

4. 2. Psoas Major Origin – T12 and Lumbar vertebrae
Insertion – lesser trochanter, femur
Action - hip flexion

5. 7. Gluteus Minimus 8. Gluteus Medius
Origin – Iliac, lateral surface
Insertion – greater trochanter
Action - abduction

6. 10. Gluteus Maximus Origin – iliac, sacrum, coccyx
Insertion – gluteal tuberosity, IT band
Action – extension of thigh

7. Anterior Muscles of the Thigh
11. Vastus lateralis
12. Vastus medialis
13. Vastus intermedius
14. Rectus Femoris
15. Sartorius

8. Muscles of the Thigh Quadriceps

9. 11.Vastus Lateralis
13.Vastus Intermidius
12.Vastus Medilais
Origin – Greater Trochanter
Insertion – tibia via patella
Action – leg extension

10. 14. Rectus Femoris Origin – Ilium, acetabulum
Insertion – tibia via patella
Action – leg extension
PLUS some hip flexion

11. 15. Sartorius I am the longest muscle Origin – iliac spine
Insertion – tibia, medial shaft
Action – lateral rotation of thigh
I am the longest muscle

12. Posterior Muscles of the Thigh
16. Semimembranosus
17. Semitendinosus
18. Biceps femoris

13. 16.Semimembranosus 17.Semitendinosus
Origin – ischial tuberosity
Insertion – tibia medial condyle
Action – leg flexion

14. 18. Biceps Femoris Origin – ischial tuberosity (long)
linea aspera of femur
(short)
Insertion – head of fibula
Action – leg flexion

15. Adductor Muscles of the Thigh
19. Adductor magnus
20. Adductor brevis
21. Adductor longus

16. 19. Adductor magnus 20. Adductor brevis 21. Adductor longus
Origin – Pubis
Insertion - Femur
Action – adduction

17. Muscles of the Leg

18. 24.Extensor digitorum longus
The tendon splits at the
Ankle into 5 branches
4 to the lesser toes
1 to the lateral foot

19. 25.Extensor hallucis longus
Hallux means big toe

20. 26. Tibialis Anterior Origin – Tibia, lateral
Insertion – medial tarsal
Action – dorsi flexion

21. 28. Flexor Hallucus longus 30. Flexor digitorum longus
Antagonists to the extensors!

22. 31. Gastrocnemius Origin – Femur lateral condyles
Insertion - Tendocalcaneus
Action – Plantar flexion

23. 31a. Soleus

24. Muscles of the Trunk

25. Pectoralis Minor Origin Ribs Insertion – Coracoid
Action – brings extended arm down + adduction

26. Pectoralis Major Origin Sternum Insertion – Humerus
Action – brings extended arm down + adduction

27. Rectus and Transverse Abdominus
Linea Alba
Aponeurosis

28. Internal and External Obliques

29. Muscles of the Back

30. 20. Latissumus Dorsi
Origin – T7-T12, all lumbar and sacral, iliac crest
Insertion – humerus, bicipital groove
Action – brings extended arm down + adduction

31. 21. Trapezius Origin – Occipital, C7 and Thoracic
Insertion – spine of scapula
Action on Scapula
Cervical - up
Middle - midline
Lower - down

32. 16. Rhomboids
Action – bring Scapula towards each other

33. Muscles of the Shoulder

34. Rotator Cuff Anterior 5. Subscapularis
Origin – Under Scapula
Insertion – humerus
Action – lateral rotation

35. Rotator Cuff Posterior
Origin – 1.Supraspinatus, above spine
2.Infraspinatus, below
3.Teres minor, belower
Insertion – Humerus
Action – Outward Rotation

36. 6. Deltoid Origin – lateral 1/3 of clavicle, acromion, scapula
Insertion – humerus, deltoid tuberosity
Action – raise the arm

37. Deltoid
Detailed look at the origin

38. Muscles of the Arm

39. 8.Brachialis Origin – humerus, below deltoid insertion
Insertion – ulna
Action – Arm Flexion

40. 9.Biceps Brachii
Origin – LH, Scapula above GH articulation SH, corocoid process
Insertion – Radial tuberosity
Action – Arm Flexion

41. 10.Triceps Brachii O – Long, posterior Lateral, lateral Medial, lower
I – Ulna, Olecranon
F – Extension, elbow

42. Flexors
Origin –
Insertion –
Action –

43. Origin –
Insertion –
Action –

44. 8.Sternocleidomastoid Origin – manubrium, sternal head of clavicle
Insertion – mastoid process
Action – turns the head, flexes the head if both are contracted

45. 15. Masseter

46. 3. Orbicularis Oculi
Encircles the eye

47. 6. Orbicularis Oris
Encircles the mouth

48. Fin