Muscle Practical #2 - Action

Biceps brachii

Elbow flexion, supination of forearm

Arm flexion (long head only - crosses should joint)

Brachialis (deep to biceps brachiaa)

Elbow flexion

Brachioradialis (superficial muscle of lateral forearm)

Elbow flexion

Triceps brachii (posterior arm)

Elbow extension

Arm extension and adduction (long head only - crosses shoulder joint)

Flexor carpi radialis (anterior)

Wrist flexion, abduction of hand

Flexor carpi ulnaris (anterior)

Wrist flexion, adduction of hand

Extensor carpi radialis longus (posterior)

Wrist extension, abduction of hand

Extensor carpi ulnaris (posterior)

Wrist extension, adduction of hand

Gluteus maximus

Hip extension, abduction and lateral rotation

Gluteus medius

Hip abduction and medial rotation

Gracilis

Hip adduction; knee flexion (crosses knee joint)

Iliacus

Hip flexion and trunk flexion

Psoas major

Hip flexion and trunk flexion, including lateral

Sartorius

Hip flexion, abduction and lateral rotation; knee flexion

Tensor fascia lata

Steadies the leg and trunk; hip flexion, abduction and medial rotation

Biceps femoris

Hip extension; knee flexion

Semitendinosus

Hip extension; knee flexion

Semimembranosus

Hip extension; knee flexion

Rectus femoris

Hip flexion; knee extension (crosses hip joint)

Vastus intermedius

Knee extension

Vastus lateralis

Knee extension

Vastus medialis

Knee extension

Tibialis anterior

Dorsiflexion; foot inversion

Gastrocnemius

Plantar flexion; knee flexion

Soleus (deep to gastrocnemius)

Plantar flexion

Fibularis (peroneum) longus

Plantar flexion; foot eversion