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Vastus Lateralis Muscle

Musculus vastus lateralis or musculus vastus externus is the Latin pronunciation for Vastus Lateralis Muscle. It is the largest part of Quadriceps Femoris.

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Vastus Lateralis Muscle


ANATOMY

Vastus Lateralis Muscle arises from a wide Aponeurosis (layer of flat broad tendon) attached to the upper part of the Intertrochanteric Line (line on anterior side of Femur) which is also attached to the inferior and anterior borders of Greater Trochanter, lateral lip of Gluteal Tuberosity and lateral lip of Linea Aspera. The Three quarters of the Vastus Lateralis Muscle is covered by this Aponeurosis forming the origin of many fibers from its deep surface.

Few fibers originate from Lateral Intermuscular Septum (fold of deep fascia in thigh) between the Vastus Lateralis Muscle. Vastus Lateralis Muscle is one of the four muscles of the Quadriceps muscles. It is located in the side of thigh. It is also inserted in the Lateral base and border of Patella (kneecap).

 

INNERVATION

The nerve supply to this muscles is through Muscular branches of Femoral Nerves L2, L3 and L4.

 

BLOOD SUPPLY

The blood supply of the muscle comes from the Lateral Circumflex Femoral Artery.

 

FUNCTION

The main function of Vastus Lateralis Muscle is the extension of the lower leg and allowing the body to rise from squatting position. Together with all other Quadriceps Muscles it provides Stability and Strength to legs allowing them to absorb the impacts of daily life activities like walking, running jumping.

 

CLINICAL SIGNIFICANCE

Common injuries relating Vastus Lateralis Muscle are Strains and Contusions. Strains are usually the tear of muscle and Contusions occurs when muscle is crushed against bone in the event of an impact.



ANATOMY

Vastus Lateralis Muscle arises from a wide Aponeurosis (layer of flat broad tendon) attached to the upper part of the Intertrochanteric Line (line on anterior side of Femur) which is also attached to the inferior and anterior borders of Greater Trochanter, lateral lip of Gluteal Tuberosity and lateral lip of Linea Aspera. The Three quarters of the Vastus Lateralis Muscle is covered by this Aponeurosis forming the origin of many fibers from its deep surface.

Few fibers originate from Lateral Intermuscular Septum (fold of deep fascia in thigh) between the Vastus Lateralis Muscle. Vastus Lateralis Muscle is one of the four muscles of the Quadriceps muscles. It is located in the side of thigh. It is also inserted in the Lateral base and border of Patella (kneecap).

 

INNERVATION

The nerve supply to this muscles is through Muscular branches of Femoral Nerves L2, L3 and L4.

 

BLOOD SUPPLY

The blood supply of the muscle comes from the Lateral Circumflex Femoral Artery.

 

FUNCTION

The main function of Vastus Lateralis Muscle is the extension of the lower leg and allowing the body to rise from squatting position. Together with all other Quadriceps Muscles it provides Stability and Strength to legs allowing them to absorb the impacts of daily life activities like walking, running jumping.

 

CLINICAL SIGNIFICANCE

Common injuries relating Vastus Lateralis Muscle are Strains and Contusions. Strains are usually the tear of muscle and Contusions occurs when muscle is crushed against bone in the event of an impact.

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