1. Anatomy Wokrshop
Psoas & Hamstring muscles
분당서울대학교병원
정형외과 김태원

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. (Thomas. 1876) Thomas test Supine position
(Chung et al. JBJS-Am 2011)
Supine position
Adequate flex uninvolved limb
(Thomas. 1876)

6. Staheli test Prone position
gradually extends the thigh until beginning of spinal motion
(Staheli. 1977)
(Chung et al. JBJS-Am 2011)

7. Posterior femoral muscles
(Hamstrings)

8. 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.

9. Biceps femoris(short head)
Origin:
1. linea aspera,
2. supracondylar line
Insertion: fibula,
lateral tibia
Action:
knee flexion & ER
Innervation:
Peroneal division of sciatic N

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

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

12. Anatomy Seminar UUH OS

13. Popliteal angle
(Chung et al. JBJS-Am in press)

14. Thank you !!