quadriceps femoris (muscle)
Definition: anterior thigh muscles; origin, by four heads: rectus femoris, vastus lateralis, vastus intermedius, and vastus medialis; insertion, patella, and thence by patellar ligament to tibial tuberosity; action, extends leg; flexes thigh by action of rectus femoris; nerve supply, femoral.
Synonym(s): musculus quadriceps femorisTA, musculus quadricepsTA, musculus quadriceps extensor femoris, quadriceps muscle of thigh
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