Major Muscles of the Anterior Thigh and Their Nerve Supply
Sartorius Muscle: Anatomy, Function, and Nerve Supply
The sartorius muscle is the longest muscle in the human body, responsible for various movements of the hip and knee. It originates from the ASIS, inserts onto the tibia, and is innervated by the femoral nerve.
Major Muscles of the Anterior Thigh and Their Nerve Supply
Sartorius Muscle: Anatomy, Function, and Nerve Supply
The sartorius muscle, the longest muscle in the human body, plays a crucial role in the movement and stability of the lower limb. It is responsible for hip flexion, abduction, and lateral rotation, as well as knee flexion. The muscle originates from the anterior superior iliac spine (ASIS) and inserts into the medial aspect of the tibia via the pes anserinus.
Anatomy of the Sartorius Muscle
- Origin: Anterior superior iliac spine (ASIS)
- Insertion: Medial tibia (via the pes anserinus)
- Function: Hip flexion, abduction, lateral rotation, knee flexion
- Nerve Supply: Femoral nerve (L2, L3)
Function of the Sartorius Muscle
The sartorius muscle enables various movements, including crossing the legs in a seated position, assisting with walking, and stabilizing the knee during dynamic activities.
Nerve Supply and Clinical Significance
Innervated by the femoral nerve, the sartorius muscle is part of the anterior thigh muscle group. Damage to the femoral nerve can impair hip and knee functions, affecting mobility and gait. Clinically, injuries to this muscle may present with tenderness and difficulty in movements such as stair climbing.
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