Muscles of the arms and legs Muscles that

Muscles of the arms and legs

Muscles that move the forearm • Biceps brachii – flexes the forearm and supinates the hand • Brachialis – Flexes forearm • Brachioradialis – flexes forearm

Muscles that move the forearm • Triceps brachii – extends forearm and arm( Elbow extensor)

Muscles of the Forearm: Anterior Compartment * * * These muscles are primarily flexors of the wrist and fingers * * Figure 10. 15 a

Muscles of the forearm: Anterior • Pronator teres – Pronates the forearm and hand • Flexor carpi radialis – flex and abduct wrist • Flexor carpi ulnaris – flex and adduct wrist

Muscles of the Forearm: Posterior Compartment * * These muscles are primarily extensors of the wrist and fingers * * Figure 10. 16 a

Muscles of the Forearm: Posterior • Extensor carpi ulnaris – Extends & adducts hand at wrist joint • Extensor carpi radialis longus – Extends and abducts the wrist • Extensor digitorum – Extends the wrist and phalanges

Muscles That Move Thigh Posterior (right thigh) • Gluteus Maximus – Extends and rotates thigh laterally • Gluteus Medius – abducts and rotates thigh laterally

Muscles That Move Thigh: Anterior • Tensor fasciae latae – flexes and abducts thigh • Adductor Longus – Adducts thigh medically Muscles That Move The Leg: Anterior • Sartorius - longest muscle - flex leg, flex thigh, rotate thigh

Muscles That Move The Leg • Gracilis – Adducts thigh at hip joint, medially rotates thigh and flex leg at knee joint. • Hamstring Muscles: • Extends thigh @ hip joint and flexes the leg @ knee – Biceps Femoris – Semitendinous – Semimembranous

Muscles That Move The Leg • Quadricep Femoris Group: – – Rectus Femoris Vastus lateralis Vastus medialis Vastus intermedius • All these muscles extends leg @ knee and only the rectus femoris also flexes thigh @ hip joint. – Thus the vastus muscles are knee extensors.

Muscles that move the feet & toes • Gastrocnemius – Plantar flexion (point feet down) • Soleus – Deep to the gastrocnemius – plantar flexion of foot

Muscles that move the feet & toes • Peroneus longus (Fibularis longus) – plantar flexes and everts the foot • Tibialis posterior – plantar flexes, inverts foot • Flexor digitorum longus – plantar flexes, inverts foot, flex toes

Muscles that move the feet & toes • Tibialis anterior – dorsiflexes, inverts foot • Extensor digitorum longus – dorsiflexes and everts foot, extends toes