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anterior viewclick to hear

anterior view extensor digitorum brevis peroneus longus anterior tibialis vastus medialis rectus femoris sartorius adductor longus tensor of fascia lata brachioradialis rectus abdominis external oblique deltoid masseter orbicularis of eye plantar interosseous extensor digitorum longus soleus gastrocnemius vastus lateralis ulnar flexor of wrist short palmaris long palmaris pronator teres brachialis biceps of arm pectoralis major trapezius sternocleidomastoid frontalis

extensor digitorum brevis click to hear

Muscle that allows the big toe to extend and reinforces the action of the long extensor (extension of certain toes).

peroneus longus click to hear

Muscle attached to the fibula enabling the foot to extend and to draw away from the median axis of the body; it also supports the plantar arch.

anterior tibialis click to hear

Thick muscle enabling the foot to flex on the leg and to draw near the median axis of the body; the posterior tibial allows the foot to extend.

vastus medialis click to hear

Large deep inner-thigh muscle mainly enabling the knee to extend; it also stabilizes the knee.

rectus femoris click to hear

Powerful muscle enabling the knee to extend and the thigh to flex on the pelvis.

sartorius click to hear

Long narrow ribbon-shaped muscle enabling the thigh to flex and to rotate outwardly (outside the median axis); it also allows the leg to flex.

adductor longus click to hear

Long muscle enabling the thigh to draw near the median axis of the body; it also allows it to rotate outwardly (outside the median axis) and to flex.

tensor of fascia lata click to hear

Thick muscle especially enabling the leg to stretch and the thigh to flex and draw away from the median axis of the body; it also stabilizes the hip and the knee.

brachioradialis click to hear

Muscle mainly enabling the forearm to flex on the arm.

rectus abdominis click to hear

Flat muscle enabling the trunk to flex frontward; it protects and enables compression of the internal organs, and aids in expiration.

external oblique click to hear

Large thin muscle enabling the trunk to flex and to rotate on the pelvis and the internal organs to compress; it also aids in expiration.

deltoid click to hear

Thick triangular muscle drawing the arm away from the median axis of the body and directing it toward the front and back until it is horizontal.

masseter click to hear

Masticator muscle enabling the lower jaw to move.

orbicularis of eye click to hear

Large slender circular muscle surrounding the eye socket; it allows the eyelids to close.

plantar interosseous click to hear

Lower muscle of the foot enabling the three last toes to draw near the median axis of the foot; it also allows their first phalanx to flex.

extensor digitorum longus click to hear

Long muscle allowing all the toes, except the big toe, to extend; it also helps the foot to flex on the leg.

soleus click to hear

Thick muscle enabling the foot to extend, the heel to lift off the ground and the body to rise; it is a major muscle involved in walking, running and jumping.

gastrocnemius click to hear

Large thick muscle forming the curve of the calf and allowing the foot to extend; it also helps the knee to extend.

vastus lateralis click to hear

Large outer thigh muscle mainly allowing the knee to extend; it also stabilizes the knee.

ulnar flexor of wrist click to hear

Muscle enabling the hand to flex and to draw near the median axis of the body.

short palmaris click to hear

Muscle mainly enabling the hand to flex.

long palmaris click to hear

Muscle enabling various hand movements, including flexing it and drawing it away from the median axis of the body; it also helps to stabilize the wrist.

pronator teres click to hear

Short round muscle enabling the forearm to flex on the arm and to rotate inwardly, turning the palm of the hand toward the back.

brachialis click to hear

Powerful muscle enabling the forearm to flex on the arm.

biceps of arm click to hear

Muscle allowing the forearm to flex and to rotate outwardly (palm of the hand toward the front); the biceps contracts while the triceps relaxes.

pectoralis major click to hear

Flat muscle enabling various arm movements, such as drawing it near the median axis of the body and rotating it inwardly (toward the median axis); it also aids in inhalation.

trapezius click to hear

Large flat triangular muscle enabling many shoulder movements; it also helps to extend the head.

sternocleidomastoid click to hear

Powerful muscle enabling the head to flex, to tilt sideways and to rotate.

frontalis click to hear

Muscle that creases the skin of the forehead, raises the eyebrows and pulls the scalp forward.