Muscles of the Lower Limb Flashcards
Iliopsoas (Iliacus and Psoas Major)
O: Iliac crest (Iliacus) and Lumbar vertebrae (Psoas Major)
I: Lesser trochanter of femur
A: Flex trunk, thigh, and vertebral column
Sartorius
O: Anterior superior iliac spine
I: Proximal tibia
A: Flexes, abducts, and laterlly rotates thigh. Also flexes knee
Adductors (Magnus, Brevis, and Longus)
O: Ischial and pubic rami (Magnus), Pubis (Longus), and Inferior ramus of pubis (Brevis)
I: Linea aspera of femur
A: Adduct and medially rotate/flex thigh
Gracilis
O: Inferior ramus and body of pubis
I: Medial surface of tibia
A: Adduct and medially rotate/flex thigh
Rectus femoris
O: Anterior inferior iliac spine and acetabulum
I: Tibial tuberosity and patella
A: Extend knee AND flex thigh
Vastus lateralis
O: Greater trochanter and Linea aspera
I: Tibial tuberosity and patella
A: Extend and stabilize knee
Vastus medialis
O: Linea aspera
I: Tibial tuberosity and patella
A: Extend and stabilize knee
Vastus intermedius
O: Anterior lateral surface of femur
I: Tibial tuberosity and patella
A: Extend and stabilize knee
Tensor faciae latae
O: Iliac crest and Iliac spine
I: Iliotibial tract
A: Steadies trunk
Gluteus maximus
O: Dorsal ilium, sacrum, and coccyx
I: Iliotibial tract
A: Powerful thigh extensor
Gluteus medius
O: Upper lateral surface of ilium
I: Greater trochanter of femur
A: Abducts and medially rotates thigh
Bicep femoris
O: Ischial tuberosity, linea aspera, and distal femur
I: Head of fibula and proximal tibia
A: Extend thigh and flex knee
Semitendinosus
O: Ischial tuberosity
I: Upper medial tibial shaft
A: Extend thigh and flex knee
Semimembranosus
O: Ischial tuberosity
I: Head of tibia and distal lateral condyle of femur
A: Extend thigh and flex knee
Tibialis anterior
O: Lateral condyle and upper part of tibia
I: By tendon into the inferior surface of first cuneiform and metatarsal 1
A: Prime mover of dorsiflexion
