Origin

Antero/ lateral femur

Insertion

Patellar ligament

Action(s)

Extends leg

Nerve Supply

Femoral nerve

Arterial Supply

Femoral artery

Physical Exam

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Clinical Importance

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Disease States

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Discussion

The Vastus medialis and Vastus intermedius appear to be inseparably united, but when the Rectus femoris has been reflected a narrow interval will be observed extending upward from the medial border of the patella between the two muscles, and the separation may be continued as far as the lower part of the intertrochanteric line, where, however, the two muscles are frequently continuous.

Figures

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From Wikipedia:
Vastus intermedius

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