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Muscles 1
Muscles of the Pelvic Girdle & Leg
| Muscle Name | Origin (O) and Insertion (I) | Action |
|---|---|---|
| Biceps Femoris | O: Ischial Tuberosity I: Head of Fibula | Extend thigh and flex knee |
| Semitendinosus | O: Ischial Tuberosity I: Top of Tibia | Extend thigh and flex knee |
| Semimembranosus | O: Ischial Tuberosity I: Medial Tibial Condyle | Extend thigh and flex knee |
| Gluteus Maximus | O: coccyx I: Gluteal Tuberosity of Femur | Extends thigh |
| Gluteus Medius | O: Lateral surface of ilium I: Greater trochanter | Abducts thigh |
| Tensor Fasciae Latae | O:Iliac Crest I: Lateral Side of Tibia | Abducts and Flexes thigh |
| Gracilis | O: Pubis I: Medial side of tibia | Adducts thigh Medially rotates thigh during walking |
| Adductor Longus | O: Pubis I: Linea Aspera | Adducts thigh |
| Pectineus | O: Pubis I: Between Lesser Trochanter and Linea Aspera | Adducts thigh |
| Rectus Femoris | O: Anterior-Inferior Iliac Spine I: Patella and Tibial Tuberosity | Extend leg at the knee and flex the thigh at hip |
| Vastus Lateralis | O: Greater Trochanter I: Patella and Tibial Tuberosity | Extend leg at the knee |
| Vastus Intermedius | O: Anterior and Lateral surface upper shaft of femur I: Patella and Tibial Tuberosity | Extend leg at the knee |
| Vastus Medialis | O: Linea Aspera I: Patella and Tibial Tuberosity | Extend leg at the knee |
| Sartorius | O: Anterior-Superior Iliac Spine I: Medial side of tibia | Flexes knee and hip. Laterally rotates thigh at hip. Medially rotates lower leg at knee. (Crossing your legs) |
| Tibialis Anterior | O: Lateral Condyle I: Medial Cuneiform & 1st Metatarsal | Dorsiflexion |
| Gastrocnemius | O: Medial and Lateral Condyles of Femur I: Calcaneous | Plantar Flexion |
| Soleus | O: Upper Tibia I: Calcaneous | Plantar Flexion |
| Fibularis Longus | O: Head of Fibula I: 1st Metatarsal | Plantar Flexion |
| Iliopsoas | O: Iliac Fossa I: Lesser Trochanter | Prime mover for hip flexion. Laterally rotates thigh |