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Anatomy Atlases: Atlas of Human Anatomy in Cross Section: Section 7. Lower Limb

Atlas of Human Anatomy in Cross Section: Section 7. Lower Limb

Plate 7.5

Ronald A. Bergman, Ph.D., Adel K. Afifi, M.D., Jean J. Jew, M.D., and Paul C. Reimann, B.S.
Peer Review Status: Externally Peer Reviewed

Plate 7.5

Upper Left Quadrant

Lower Left Quadrant

Lower Right Quadrant

Upper Right Quadrant

1. Medial lip of linea aspera of femur
2. Vastus medialis
3. Fascia lata

4. Medial intermuscular septum and popliteal a. and v.
5. Saphenous nerve
6. Tendon m. adductor magnus
7. Sartorius m.
8. Hiatus of adductor canal (Hunter's)
9. Great saphenous v.
10. Gracilis m. and tendon
11. Semimembranosus m.

12. Semitendinosus m. and tendon
13. Posterior femoral cutaneous nerve
14. Tibial and common peroneal nerves
15. Biceps femoris (long head) m.
16. Biceps femoris (short head) m.

17. Lateral intermuscular septum
18. Lateral lip of linea aspera of femur
19. Iliotibial tract (Maissiat's band)
20. Vastus lateralis m.
21. Vastus intermedius m.
22. Femur
23. Tendon m. quadriceps

This section is three sections (3 cm) below the preceding one. The section cuts the adductor canal hiatus (8). It is at this point that the femoral artery and vein are renamed popliteal artery and vein (4). They will retain this name until the vessels reach the lower border of the popliteus muscle, after which they are renamed. The popliteal vessels terminate when they divide into the anterior and posterior branches: the anterior and posterior tibial artery and vein.

Note the reduction in size of the biceps femoris (long head) (15), semitendinosus (12), and gracilis (10) muscles. They lie beneath biceps femoris (short head) (16), semimembranosus (11), and sartorius (7) muscles, respectively.

Note the divergence of the lips of linea aspera (1, 18), with biceps femoris occupying the interval between the two lips. The divergence will continue and define a triangular surface of bone, the popliteal surface (planum popliteum).

The tibial nerve usually arises from lumbar nerves 4 and 5 and sacral nerves I and 2, and occasionally sacral 3 in addition. The common peroneal nerve arises from lumbar 4 and 5 and sacral nerves 1 and 2.

The posterior femoral cutaneous nerve (also known as the small sciatic nerve) arises from sacral nerves 1, 2, and 3.

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