Sartorius Muscle

Sartorius Muscle

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What is the Sartorius?

The sartorius is a muscle located in the anterior compartment of the thigh. It is long and thin, running across the thigh in an inferomedial direction. The sartorius is the longest muscle in the human body, and it plays an important role in providing stabilization and mobility to the hip and knee joints.


The sartorius attaches at two points: the anterior superior iliac spine (ASIS) and the superomedial aspect of the tibia (Fig. 1).


The sartorius muscle works to perform three main actions at the hip joint: flexion, abduction and lateral rotation. At the knee joint, the sartorius is responsible for flexion.


The femoral nerve is responsible for innervating the sartorius muscle.

Blood Supply

The sartorius muscle receives its blood supply from the femoral artery.

Figure 1

The muscles of the anterior thigh can be seen in Figure 1, with the sartorius muscle highlighted in red.

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