Fibularis Longus Muscle - Attachments & Action
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.
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.
Actions on the leg (tibia & fibula):
Flexes leg at knee. (It also flexes, abducts, and laterally rotates thigh at hip).
Nerve to Muscle and its Spinal Segment:
Femoral nerve (L2-L3).