Muscles Lower Extremity OIA Flashcards
Origin Insertion Action
Tensor Fascia Latae
A: 1: Tenses fascia lata 2: Hip flexion, abduction & medial rotation
Gluteus Maximus Largest
O: Iliac crest, posterolateral ilium
I: Below the greater trochanter, and IT tract
A: Hip extension & lateral rotation
Gluteus Medius
O: Iliac crest, posterolateral ilium
I: Greater trochanter
A: Hip abduction & medial rotation
Gluteus Minimus smallest and deepest
O: Lateral ilium
I: Greater trochanter
A: Hip abduction & medial rotation
Piriformis
A: Hip abduction & lateral rotation
Quadratis Femoris
A: Hip lateral rotation
Adductor Longus (Superficial)
A: Hip adduction & flexion
Adductor brevis
A: Hip adduction & flexion
Adductor magnus
O: Inferior ramus of pubis & ischial tuberosity
I: Linea aspera
A: Hip adduction & flexion
Iliopsoas (Iliacus+Psoas major)
I: Lesser trochanter
A: Hip flexion, trunk flexion when hip is stable
Gracilis (Medial leg of V shape)
O: Inferior ramus of pubis
I: Upper medial tibia
A: 1: Knee flexion 2: Hip adduction
Sartorius (lateral Leg of V Shape)
O: Anterior superior iliac spine
I: Upper medial tibia
A: 1- Hip flexion & lateral rotation 2- knee flexion
Vastus Medialus
O: Introchanteric line & medial linea aspera
I: Tibial tuberosity
A: Knee extension
Vastus lateralis
O: Linea aspera & greater trochanter
I: Tibial tuberosity
A: Knee extension
Rectus femoris
O: Anterior inferior iliac spine
I: Tibial Tuberosity
A: Hip flexion, knee extension
Vastus intermedius
O: Anterior & lateral femur
I: Tibial Tuberosity
A: Knee extension
Biceps femoris
O: Long head (ischial tuberosity)/Short head (Linea aspera)
I: Head of fibula & lateral condyle of tibia
A: Extension & Lateral rotation of hip
Semitendinosus
O: Ischial tuberosity
I: Proximal, medial shaft of the tibia
A: Extends and medially rotates hip, flexes knee
Semimembranosus
O: Ischial tuberosity
I: Posterior medial condyle of tibia
A: extends and medially rotates hip, flexes knee
Fibularis longus
A: plantar flexes and everts foot
Fibularis brevis
A: Plantar flexes and everts foot
Tibialis anterior
A: Dorsiflexes ankle and inverts foot
Extensor hallucis longus
A: Extends Hallux, dorsiflexes ankle
Extensor digitorum longus
A: extends toes, dorsiflexes ankle
