| Vastus intermedius muscle | |
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| Muscles of lower extremity | |
| Gray's | subject #128 471 |
| Origin | antero/ lateral femur |
| Insertion | patellar ligament |
| Artery | femoral artery |
| Nerve | femoral nerve |
| Actions | extends leg |
The Vastus intermedius (Cruraeus) arises from the front and lateral surfaces of the body of the femur in its upper two-thirds, sitting under Rectus Femoris and from the lower part of the lateral intermuscular septum. Its fibers end in a superficial aponeurosis, which forms the deep part of the Quadriceps femoris tendon.
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.
Additional images
 Right femur. Anterior surface. |
 Right femur. Posterior surface. |
 Muscles of the iliac and anterior femoral regions. |
 Cross-section through the middle of the thigh. |
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 As such, some of the information contained herein may be outdated.
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