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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 |