Muscles of anterior part of thigh

Muscles of anterior part of thigh

Muscle	Origin	insertion	nerve	action	comment
Articularis genus	Distal anterior femoral shaft	Synovial capsule	Femoral	Pulls capsule superiorly in extension	May join with vastus intermedialis
Sartorius	ASIS	Prox .med. tibia (pes anserinus)	Femoral	Flex, ER hip	Can avulse from ASIS (avulsion fracture)
Quadriceps
Rectus femoris	1.     AIIS 2.     Sup. Acetab. rim	Patella/tibial tubercle	Femoral	Flex thigh, extend leg	Can avulse from AIIS (avulsion fracture)
Vastus lateralis	Gtr, Trochanter, lat. Linea aspera	Lateral patella/ tibia tubercle	Femoral	Extend leg	Oblique fibers can affect Q angle
Vastus intermedius	Proximal femoral shaft	Patella/tibial tubercle	Femoral	Extend leg	Covers articularis genu
Vastus medialis	Intertrochant. line, med. linea aspera	Medial patella/tibia tubercle	Femoral	Extend leg	Weak in many patellofemoral disorders

Ref) Netter’s concise orthopaedic anatomy P266