Vastus lateralis muscle

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Vastus lateralis muscle

Muscles of lower extremity

Cross-section through the middle of the thigh. (Vastus lateralis labeled at bottom left.)
Gray's	subject #128 470
Origin:	Greater trochanter, Intertrochanteric line, and Linea aspera of the Femur
Insertion:	Patella and Tibial tuberosity via the Patellar ligament
Blood:
Nerve:	Femoral nerve
Action:	Extends and stabilizes knee.

The Vastus lateralis (Vastus externus) is the largest part of the Quadriceps femoris. It arises by a broad aponeurosis, which is attached to the upper part of the intertrochanteric line, to the anterior and inferior borders of the greater trochanter, to the lateral lip of the gluteal tuberosity, and to the upper half of the lateral lip of the linea aspera; this aponeurosis covers the upper three-fourths of the muscle, and from its deep surface many fibers take origin.

A few additional fibers arise from the tendon of the Glutæus maximus, and from the lateral intermuscular septum between the Vastus lateralis and short head of the Biceps femoris. The fibers form a large fleshy mass, which is attached to a strong aponeurosis, placed on the deep surface of the lower part of the muscle: this aponeurosis becomes contracted and thickened into a flat tendon inserted into the lateral border of the patella, blending with the Quadriceps femoris tendon, and giving an expansion to the capsule of the knee-joint.

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Muscles of the iliac and anterior femoral regions.

Muscles of the gluteal and posterior femoral regions.

The femoral artery.

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[edit] External links

This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.