Muscles that Move the Thigh & Leg

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Presentation transcript:

Muscles that Move the Thigh & Leg

Muscles that move the thigh (hip joint) Muscles are attached to the pelvic girdle and femur. Anterior group muscles: Flex thigh (hip): 1. Psoas major 2. Iliacus Adductors - first 3 also flex thigh: 1. Pectineus 2. Adductor longus - rotates laterally 3. Adductor magnus 4. Gracilis – flexes knee *Total of 5 anterior muscles that flex thigh. Foreswing of thigh when walking, running.

Posterior group muscles: Extend thigh (hip): 1. Gluteus maximus – largest muscle in the body. *Straightens leg at the hip when walking, running climbing; raises body from sitting position. Abduct thigh - and rotate medially: 1. Gluteus medius 2. Tensor fasciae latae – Flexes thigh

Muscles That Move the Thigh Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Psoas major Psoas minor Iliacus Tensor fasciae latae Pectineus Sartorius Adductor longus Sartorius Rectus femoris Adductor magnus Vastus intermedius Vastus lateralis Gracilis Quadriceps femoris tendon (patellar tendon) Vastus medialis Patella Patellar ligament (a) (b) Adductor brevis Gracilis Adductor longus Adductor magnus (c) (d) (e) Psoas major Psoas minor Iliacus (f) (g)

Muscles That Move the Thigh Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Gluteus medius Tensor fasciae latae Gluteus maximus Sartorius Rectus femoris Vastus lateralis Biceps femoris Iliotibial tract (band) (a) Gluteus medius Gluteus minimus Gluteus maximus Piriformis (b) (c) (d)

Muscles That Move the Thigh

This group connects the tibia or fibula to the femur or pelvic girdle. Muscles that Move the Leg (knee joint): This group connects the tibia or fibula to the femur or pelvic girdle. Flexors: 1. Biceps femoris- rotates leg laterally 2. Semitendinosus- rotates leg medially 3. Semimembranosus- rotates leg medially 4. Sartorius (on the anterior side of the leg) – flexes hip

An extensor of the knee is the Quadriceps femoris group: (made up of four muscles): 1. Rectus femoris 2.Vastus lateralis 3. Vastus intermedius 4. Vastus medialis

Muscles That Move the Leg Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Gluteus medius Gluteus maximus Adductor magnus Vastus lateralis covered by fascia Gracilis Semitendinosus Biceps femoris Semimembranosus Sartorius Gastrocnemius Semitendinosus (a) Biceps femoris (long head) Semimembranosus Biceps femoris (short head) (b) (c)

Muscles That Move the Leg Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Plantaris Iliotibial tract (band) Soleus Semitendinosus Biceps femoris Semimembranosus Gastrocnemius Gracilis Sartorius Gastrocnemius: Medial head Lateral head Fibularis longus (b) (c) Soleus Calcaneal tendon Fibularis brevis Flexor digitorum longus Tibialis posterior Flexor retinaculum Flexor digitorum longus Calcaneus Fibular retinacula (a) (d) (e)

Muscles That Move the Leg