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Origin
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Insertion
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Action
|
Answer
|
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Iliac fossa & ala of sacrum
|
Lesser trochanter of femur
|
Thigh flexion; with legs fixed, flexes trunk.
|
Iliacus (Iliapsoas)
|
|
Transverse processes of vertebrae T12-L5.
|
Lesser trochanter of femur
|
Thigh flexion; with legs fixed, flexes trunk.
|
Psoas Major (Iliapsoas)
|
|
Dorsal ilium, sacrum, coccyx
|
Gluteal tuberosity of femur, IT tract
|
Major extensor of thigh; abducts, laterally rotates thigh |
Gluteus maximus
|
|
Lateral ilium
|
Greater trochanter of femur
|
Abducts & medially rotates thigh
|
Gluteus medius
|
|
Lateral ilium
|
Greater trochanter of femur
|
Abducts & medially rotates thigh
|
Gluteus minimus
|
|
Anterolateral sacrum
|
Greater trochanter of femur
|
Laterally rotates thigh; abducts thigh
|
Piriformis
|
|
Anterior Superior Iliac Spine, iliac crest
|
IT tract
|
Stabilizes trunk; (weakly) abducts, flexes & medially rotates thigh |
Tensor fascia lata
|
|
ASIS
|
Medial proximal tibia
|
Flexes, abducts, laterally rotates thigh; (weak) leg flexor |
Sartorius
|
AIIS & superior margin of acetabulum |
Patella & tibial tuberosity via patellar ligament |
Extends leg & flexes thigh
|
Rectus femoris (Quadriceps)
|
Greater trochanter, intertrochanteric line, linea aspera |
Patella & tibial tuberosity via patellar ligament |
Extends leg & stabilizes knee
|
Vastus lateralis (Quadriceps)
|
Medial supracondylar line, intertrochanteric line, linea aspera |
Patella & tibial tuberosity via patellar ligament |
Extends leg
|
Vastus medialis (Quadriceps)
|
|
Anterior & lateral proximal femur
|
Patella & tibial tuberosity via patellar ligament |
Extends leg
|
Vastus intermedius (Quadriceps)
|
Inferior ramus & body of pubis; ischial ramus |
Medial tibia
|
Adducts thigh; flexes & medially rotates leg |
Gracilis
|
|
Pubis near pubic symphysis
|
Linea aspera
|
Adducts, flexes & medially rotates thigh |
Adductor longus
|
Ischial & pubic rami; Ischial tuberosity |
Linea aspera; medial supracondylar line, adductor tubercle of femur |
Adducts, flexes & medially rotates thigh |
Adductor magnus
|
|
Body & inferior ramus of pubis
|
Linea aspera
|
Adducts & medially rotates thigh
|
Adductor brevis
|
SH – linea aspera, lateral supracondylar & distal femur; LH – ischial tuberosity |
Head of fibula and proximal lateral tibia |
LH: Extends thigh & flexes leg SH: flexes leg |
Biceps femoris (Long head is hamstring)
|
|
Ischial tuberosity
|
Medial tibia
|
Extends thigh & flexes leg
|
Semitendinosus (Hamstring)
|
|
Ischial tuberosity
|
Medial tibia
|
Extends thigh & flexes leg
|
Semimembranosus (Hamstring)
|
|
Medial & lateral condyles of femur
|
Calcaneus via calcaneal tendon
|
Plantar flexes foot & flexes knee
|
Gastrocnemius (Hamstring)
|
Superior tibia, fibula, interosseous membrane |
Calcaneus via calcaneal tendon
|
Plantar flexes foot
|
Soleus (Hamstring)
|
|
Posterior femur
|
Calcaneus via calcaneal tendon
|
Assists in leg flexion & plantar flexes foot
|
Plantaris (Hamstring)
|
|
Lateral condyle of femur
|
Proximal tibia
|
Flexes & rotates leg medially to unlock knee when flexion begins |
Popliteus (Hamstring)
|
Superior tibia & fibula and interosseous membrane |
Tendon runs behind medial malleolus & under foot to tarsals & metatarsals |
Foot inversion (PM)
|
Tibialis posterior (Hamstring)
|
Lateral condyle & upper tibial shaft, interosseous membrane |
Inferior surface of medial cuneiform
|
Foot dorsiflexion (PM); inverts foot
|
Tibialis anterior
|
Head & upper portion of lateral fibula |
Tendon under foot to first metatarsal & medial cuneiform |
Plantar flexes & everts foot
|
Fibularis longus
|
|
Distal fibula shaft
|
Tendon behind lateral malleolus insert on proximal fifth metatarsal |
Plantar flexes & everts foot
|
Fibularis brevis
|
