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Muscular System


Abductor Stretches over fingers and separates the fingers
Abductor Digiti Minimi Runs along the outside border of the foot and connects to the heel and moves the smallest toe away from the other toes
Abductor Hallucis Runs along the interior border of the foot and moves the big toe away from the other toes
Adductor stretches over fingers and draws the fingers together
Anterior In front of
Aponeurosis a tendon that connects the frontalis and the occipitalis muscles in the epicranium
Auricularis Anterior In front of the ear
Auricularis Posterior behind the ear
Auricularis Superior above the ear
Belly The term applied to the mid-section of the muscle between the two attached sections
Bicep Primary muscle in the front of the upper arm. Raises the forearm, bends the elbow and turns the palm of the hand down
Buccinator Between the jaws and cheek. Compressing the cheek to release air outwardly as in blowing
Caninus Above the corners of the mouth. Raises the angle of the mouth, as in snarling
Corrugator Between the eyebrows controls the eyebrows drawing them in and downward
Deltoid Triangle-shaped; covers the shoulder and lifts the arm or turns it
Depressor draws down or depresses
Dilator Opens enlarges or expands
Epicranium Consists of all the structures above the cranium including muscle skin
Epicranius broad muscle covering the scalp
Extensor Mid-forearm, on the outside of the arm. Straightens the fingers and wrist
Extensor Digitorum Longus Outside of the lower leg and bends the foot up and extends the toes
Extensor Hallucis Longus Between the tibialis interior and extensor digitorum longus. Extends the big toe and flexes the foot
Flexor Mid-forearm, on the inside of the arm. Bends wrist and closes the fingers
Flexor Digiti Minimi Brevis Along the base of the small toe and flexes the joint of the small toe
Flexor Digitorum Brevis Across the ball of the foot between the toes and flexes the toes
Frontalis Muscle Do it muscle that extends from the forehead to the Top of the skull it raises eyebrows or draws the scalp forward
Gastrocnemius Back of the leg attached to the lower rear surface of the heel and pulls the foot down
Inferioris Located below or is smaller
Insertion The portion of the muscle joint to movable attachments bones movable muscles or skin
Latissimus Dorsi Flat, triangular; covers the lumbar (lower back) region and lower half of the thoracic region. Aids in swinging of the arms
Levator Lifts up
Levator Palpebrae Superioris Above the eyelids raises the eyelid
Masseter Covers the hinge of the jaw. Aids in closing the jaw, as in chewing (mastication)
Mentalis Tip of the chin. Pushes lower lip up and/or wrinkles the chin, as in expressing doubt
Myology The study of structure function and diseases of the muscles
Non-Striated Muscle Muscles that respond automatically to control various body functions including the functions of internal organs
Occipitalis Muscle At the nape of the neck. Draws the scalp back
Occipitofrontalis Broad muscle formed by two muscles joined by the aponeurosis tendon
Opponens Causes the thumb to move toward the fingers giving the ability to grasp or make a fist
Orbicularis Oculi Circles the eye socket and closes the eyelid
Orbicularis Oris Circles the mouth. Contract, puckers and wrinkles the lips in kissing or whistling
Origin Non-moving fixed portion of the muscle attached to bones or other fixed muscles
Pectoralis Major and Minor Extend across the front of the chest and assist in swinging the arms
Peroneus Brevis Originates in the lower third of the fibula and bends the foot down and out
Peroneus Longus Originates in the upper two-thirds of the outer fibula and causes the foot to invert and turn outward
Platysma Extends from the tip of the chin to the shoulder and chest. Draws the lower lip and corner of the mouth sideways and down, partially opening the mouth, as in surprise or fright
Posterior Behind or in back of
Procerus between the eyebrows Across the bridge of the nose and draws brows down wrinkles the area across the bridge of the nose
Pronator Runs across the front of the lower part of the radius and the ulna. Turns the palm of the hand downward and inward
Quadratus Labii Inferioris Below the lower lip. Pulls the lower lip down or to the side, as in expressing sarcasm
Quadratus Labii Superioris Consists of 3 parts located above the upper lip. Raises both the nostrils and the upper lip as in expressing distaste
Risorius Corner of the mouth. Draws the mouth up and out, as in grinning
Serratus Anterior Under the arm. Helps in lifting the arm and in breathing
Soleus Originates in the upper portion of the fibula from just below the knee to the heel and bends the foot down
Sternocleidomastoideus Extends along the side of the neck from the ear to the collarbone. Causes the head to move from side to side and up and down, as in nodding yes or no.
Striated Muscle Muscles that respond to commands regulated by will
Superioris located above or is larger
Supinator Runs parallel to the ulna. Turns the palm of the hand up.
Temporalis Above and in front of the ear. Opening and closing the jaw, as in chewing (mastication)
Tibialis Anterior Covers the front of the shin and bends the foot upward & inward
Trapezius Flat, triangular; cover the upper and back part of the neck and shoulders. Aids in drawing the head back and elevating the shoulder blades
Triangularis Below the corners of the mouth. Draws the corners of the mouth down as in expressing sadness
Tricep Extends the length of the upper arm to the forearm. Controls forward movement of the forearm
Zygomaticus Major and minor; outside the corners of the mouth. Draws he mouth up and back, as in laughing



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