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Lower Limb
Origin, Insertion, and Function
| Term | Definition |
|---|---|
| Sartorius | Origin: Anterior superior iliac spine Insertion: Medial surface of tibia Function: Flexes, abducts, laterally rotates thigh; flexes leg |
| Rectus Femoris | Origin: Anterior inferior iliac spine Insertion: Tibial tuberosity via patellar tendon Function: Extends leg, flexes thigh |
| Vastus Lateralis | Origin: Greater trochanter & linea aspera Insertion: Tibial tuberosity Function: Extends leg |
| Vastus Medialis | Origin: Linea aspera Insertion: Tibial tuberosity Function: Extends leg |
| Gracilis | Origin: Inferior pubic ramus Insertion: Medial surface of tibia Function: Adducts thigh, flexes leg |
| Adductor Longus | Origin: Pubis Insertion: Linea aspera of femur Function: Adducts and flexes thigh |
| Adductor Magnus | Origin: Pubis and ischial tuberosity Insertion: Linea aspera of femur Function: Adducts and extends thigh |
| Illiopsoas | Origin: Iliac fossa & lumbar vertebrae Insertion: Lesser trochanter of femur Function: Flexes thigh |
| Gluteus Maximus | Origin: Ilium, sacrum, coccyx Insertion: Gluteal tuberosity of femur Function: Extends and laterally rotates thigh |
| Gluteus Medius | Origin: Lateral ilium Insertion: Greater trochanter of femur Function: Abducts and medially rotates thigh |
| Biceps Femoris | Origin: Ischial tuberosity & linea aspera Insertion: Head of fibula Function: Extends thigh, flexes leg |
| Semitendinosus | Origin: Ischial tuberosity Insertion: Medial tibia Function: Extends thigh, flexes leg |
| Semimembranosus | Origin: Ischial tuberosity Insertion: Medial condyle of tibia Function: Extends thigh, flexes leg |
| Gastrocnemius | Origin: Medial & lateral condyles of femur Insertion: Calcaneus via Achilles tendon Function: Plantar flexes foot, flexes knee |
| Soleus | Origin: Head of fibula & tibia Insertion: Calcaneus via Achilles tendon Function: Plantar flexion |
| Tibialis Anterior | Origin: Lateral condyle of tibia Insertion: First metatarsal and medial cuneiform Function: Dorsiflexes and inverts foot |
| Calcaneal (Achilles) tendon | Origin: Gastrocnemius & soleus Insertion: Calcaneus Function: Transmits force for plantar flexion |