Sartorius Muscle

Last update: Oct 19th, 2022

The sartorius muscle is the longest muscle in the human body. It crosses both the hip and knee joints, and helps to flex the hip and knee joints and rotate the thigh outward.

Sartorius Muscle

An image showing the Sartorius muscle (highlighted) attached to the lower limb along with other muscles (Adductor brevis, Adductor magnus and Gracilis)

An image showing the Sartorius muscle attached to the lower limb along with

Attachments of Sartorius Muscle: Origin & Insertion

Origin: (proximal attachments):
Anterior superior iliac spine and the region just below it.

Insertion: (distal attachments):
Proximal tibia, medial to tibial tuberosity (part of pes anserinus).

Learn everything you need to know about sartorius anatomy with this lower extremity muscle anatomy reference chart.

An image showing the origin and insertion of the Sartorius Muscle attachment on the lower limb

Actions on the leg (tibia & fibula):

Flexes leg at knee. (It also flexes, abducts, and laterally rotates thigh at hip).

First image in animation of flexion of the leg at the knee joint. Leg in anatomical position.

Second image in animation of flexion of the leg at the knee joint.

Third image in animation of flexion of the leg at the knee joint.

Fourth image in animation of flexion of the leg at the knee joint.

Fifth image in animation of flexion of the leg at the knee joint.

Nerve to Muscle and its Spinal Segment:

Femoral nerve (L2-L3).

Sartorius Muscle

Sartorius Muscle

Attachments of Sartorius Muscle: Origin & Insertion

Actions on the leg (tibia & fibula):

Nerve to Muscle and its Spinal Segment:

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