1. Anatomy Wokrshop
Pelvis, hip and femur (myology 1)
분당서울대학교병원
정형외과 성기혁

2. Anterior muscles of pelvis

3. Psoas major Origin : T12-L5 vertebra Insertion : lesser trochanter
Action :
powerful hip flexion
Innervation:
femoral N.

4. Psoas minor Origin : T12 & L1 vertebra Insertion : pectineal line
Action :
weak flexion of trunk

5. Iliacus Origin : iliac fossa Insertion : lesser trochanter Action :
powerful hip flexion
Innervation:
Femoral N.

9. Gluteal muscles

11. Gluteus maximus Origin : ilium & dorsal sacrum Insertion
1. gluteal tuberosity
2. iliotibial band
Action
1. powerful extension
2. ER of hip
Innervation:
inferior gluteal N.
Gluteus maximus

12. Gluteus medius Origin:ilium between anterior & posterior gluteal lines
Insertion:
greater trochanter
Action:
1. powerful abduction
2. IR of hip
3. Balancing during walking
Innervation
: superior gluteal N.
Gluteus medius

13. Gluteus minimus Origin:
ilium between anterior & inferior gluteal lines
Insertion:
anterior greater trochanter
Action:
1. abduction & IR of hip
2. Assist gluteus medius during walking

14. Trendelenburg sign

15. Piriformis Origin: anterior sacrum
Insertion: superior greater trochanter
Action:
1. hip ER
2. hip abduction during flexion

17. Obturator internus Origin 1. ischiopubic rami 2.obturator membrane
Insertion: medial greater trochanter
Action:
1. hip ER
2. hip abduction during flexion

18. Superior & Inferior gemellus
Origin:
ischial spine(sup.)
ischial tuberosity(inf.)
Insertion: medial greater trochanter
Action:
1. hip ER
2. hip abduction during flexion

19. Quadratus femoris Origin: ischial tuberosity
Insertion: intertrochanteric crest
Action: hip ER

20. Posterior femoral muscles
(Hamstrings)

22. Biceps femoris(long head)
Origin: ischial tuberosity
Insertion: head of fibula
Action:
1. hip extension
2. knee flexion & ER
Innervation:
tibial division of sciatic N.

23. Biceps femoris(short head)
Origin:
1. linea aspera,
2. supracondylar line
Insertion: fibula,
lateral tibia
Action:
knee flexion & ER

24. Semitendinosus Origin: ischial tuberosity
Insertion: proximal medial tibia
Action:
1. hip extension
2. knee flexion & IR
Innervation:
tibial division of sciatic N.

25. Semimembranosus Origin: ischial tuberosity
Insertion: posterior medial tibial condyle
Action:
1. hip extension
2. knee flexion & IR
Innervation:
Tibial division of sciatic N.

26. Psoas & iliacus:
hip flexion
Gluteus medius & minimus:
hip abduction & IR
Gluteus maximus & hamstrings:
hip extension
Piriformis & short rotators:
hip ER

27. Thank you !!