[TA] deep, distal portion of vastus intermedius muscle; origin, lower fourth of anterior surface of shaft of femur; insertion, suprapatellar bursa of knee joint; action, retracts suprapatellar bursa, during extension of knee; nerve supply, femoral. SYN: musculus articularis genus [TA], articular muscle of knee, Dupré muscle, subcrural muscle, subcruralis, subcrureus, subquadricipital muscle.