Erayga "quadriceps femoris" waxaa loola jeedaa koox afar muruq ah oo ku yaal xagga hore ee bowdada, kuwaas oo si wadajir ah u shaqeeya si ay u fidiyaan lugta jilibka. Afarta muruq ee ka kooban femoris quadriceps waa femoris malawadka, vastus lateralis, vastus medialis, iyo vastus intermedius. "Quadriceps" waxaa laga soo qaatay ereyga Laatiinka ee "quad" oo macneheedu yahay "afar" iyo "ceps" oo macnaheedu yahay "madax", halka "femoris" loola jeedo lafta femur, oo ah lafta weyn ee bowdada.