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Lower Extremity OIAN
PT OIAN
| Muscle | Origin | Insertion | Action | Innervation |
|---|---|---|---|---|
| Rectus femoris (quadriceps) | AIIS | Tibial tuberosity | Knee: extension Hip: flexion | Femoral Nerve |
| Vastus intermedius (quadriceps) | Anterior shaft of femur | Tibial tuberosity | Knee: extension | Femoral N |
| Vastus lateralis (quadriceps) | Femur: Lateral linea aspera Femur: greater trochanter | Tibial tuberosity | Knee: extension | Femoral N |
| Vastus medialis (quadriceps) | Femur: Medial linea aspera | Tibial tuberosity | Knee: extension | Femoral N |
| Sartorius | ASIS | Proximal, medial tibia ** | Hip: flexion Hip: lateral rotation Hip: abduction Knee: flexion | Femoral N |
| Gluteus maximus | coccyx sacrum posterior iliac crest | Femur: gluteal tuberosity iliotibial tract (connective tissue) | Hip: hyperextension Hip: lateral rotation Hip: abduction (lower fibers also adduct) | inferior gluteal N |
| Gluteus medius | Ilium: Gluteal surface | Femur: greater trochanter | Hip: abduction | superior gluteal N |
| Gluteus minimus | Ilium: Gluteal surface | Femur: greater trochanter | Hip: Abduction and Hip: medial rotation | superior gluteal N |
| Tensor fasciae latae | Iliac crest | Iliotibial tract (connective tissue) | Hip: flexion Hip: medial rotation Hip: abduction | superior gluteal N |
| Piriformis | Anterior surface of sacrum | Femur: greater trochanter | Hip: Lateral rotation Hip: abduction | Sacral plexus |
| Adductor brevis | Pubis: Inferior ramus | Femur: Linea aspera | Hip: Adduction Hip: medial rotation | obturator N |
| Adductor longus | Pubis: pubic tubercle | Femur: Linea aspera | Hip: Adduction Hip: medial rotation | obturator N |
| Adductor magnus | Pubis: Inferior ramus Ischial tuberosity | Femur: Linea aspera Femur: adductor tubercle | Hip: Adduction Hip: medial rotation | obturator N |
| Gracilis | Pubis: Inferior ramus | Proximal, medial tibia ** | Hip: Adduction Hip: medial rotation Knee: Flexion | obturator N |
| Pectineus | Pubis: Pectineal line | Femur: Pectineal line | Hip: Adduction Hip: medial rotation | obturator N |
| Biceps femoris (hamstrings) | Ischial tuberosity Femur: linea aspera | head of the fibula | Knee: Flexion Hip: extension | Sciatic |
| Semimembranosus (hamstrings) | Ischial tuberosity | Tibia: posterior medial condyle | Knee: Flexion Hip: extension | sciatic |
| Semitendinosus (hamstrings) | Ischial tuberosity | Proximal, medial tibia ** | Knee: Flexion Hip: extension | sciatic |
| gastrocnemius | Femur: medial condyle (posterior) Femur: lateral condyle (posterior) | Calcaneus (via the Achilles tendon) | Ankle: plantarflexion Knee: flexion | Tibial |
| Soleus | Posterior tibia (proximal) head of fibula | Calcaneus (via the Achilles tendon) | Ankle: plantarflexion | Tibial |
| Tibialis posterior | Interosseous membrane (posterior) | metatarsals (2nd-4th) tarsals | Ankle: plantarflexion Ankle: inversion | Tibial |
| Flexor digitorum longus | Posterior tibia | 2nd to 5th distal phalanges (plantar surface) | Toes 2-5: Flexion | Tibial N |
| Flexor hallucis longus | Posterior fibula | 1st distal phalanx (plantar surface) | Hallux: flexion | Tibial N |
| Fibularis brevis (Peroneus brevis) | Lateral fibula (distal) | Tuberosity of 5th metatarsal | Ankle: eversion | Superficial peroneal N |
| Fibularis longus (Peroneus longus) | Head of fibula Lateral fibula (proximal) | Base of 1st metatarsal Medial cuneiform | Ankle: eversion | Superficial peroneal N |
| Tibialis anterior | Tibia: Lateral condyle Lateral tibial shaft | Base of 1st metatarsal Medial cuneiform | Ankle: Inversion Ankle: dorsiflexion | Deep peroneal N |
| Extensor digitorum longus (LE) | Interosseous membrane (anterior) | 2nd to 5th middle and distal phalanges (dorsum) | Toes 2-5: Extension Ankle: dorsiflexion | Deep peroneal N |
| Extensor hallucis longus | Interosseous membrane (anterior) | 1st distal phalanx (dorsum) | Hallux: extension Ankle: dorsiflexion | Deep peroneal N |
| iliopsoas | Lumbar bodies Lumbar transverse processes iliac fossa | Femur: Lesser trochanter | Hip flexion | Lumbar plexus |