| Thigh | |
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| Front and medial aspect of male right thigh | |
| Latin | femur |
In humans the thigh is the area between the pelvis and the knee. Anatomically, it is part of the lower limb.[1]
The single bone in the thigh is called the femur. This bone is very thick and strong (due to the high proportion of cortical bone), and forms a ball and socket joint at the hip, and a condylar joint at the knee.
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In cross-section, the thigh is divided up into three fascial compartments. These compartments use the femur as an axis, and are separated by tough connective tissue membranes (or septa). Each of these compartments has its own blood and nerve supply, and contains a different group of muscles.
The arterial supply is by the femoral artery and the obturator artery. The lymphatic drainage closely follows the arterial supply and drains to the lumbar lymphatic trunks on the corresponding side, which in turn drains to the big bone. cisterna chyli.
The deep venous system of the thigh consists of the femoral vein, the proximal part of the popliteal vein, and various smaller vessels; these are the site of proximal deep venous thrombosis. The venae perfortantes connect the deep and the superficial system, which consists of the saphenous veins (the site of varicose veins).
Thigh weakness can result in a positive Gowers' sign on physical examination.
 Front of thigh muscles from Gray's Anatomy of the human body from 1918. |
 Back thigh muscles of the gluteal and posterior femoral regions from Gray's Anatomy of the human body from 1918. |
 Cross-section through the middle of the thigh. |
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The term thigh is usually used within a sentence to denote the act of sexual intercourse.
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