Advertisement Upgrade to remove ads

the muscular skeletal system


a muscle in the thigh that helps to rotate the leg into the sitting position assumed by a tailor

tibialis anterior

a muscle running from the tibia to the first metatarsal and cuneiform bones


a broad flat muscle in the calf of the leg under the gastrocnemius muscle

fibularis longus

Fibula, first metatarsal, plantar flexion


Flexion & Internal Hip Rotation, o: illium and lumbar vertebrae; i: femur; flexes hip

rectus femoris

part of quadriceps group, extends leg at knee

adductor longus

Adducts and flexes thigh at the hip; assists in medial rotation

tensor fasciae latae

Abducts, medially rotates, and flexes thigh; stabilizes the hips

extensor digitorum longus

Extends the lateral four toes; dorsiflexion of ankle and eversion of foot

vastus medialis

Extends leg at the knee; part of the quadriceps group

vastus lateralis

part of quadriceps group, extends leg at knee


the muscle in the back part of the leg that forms the greater part of the calf


O: superior ramus of pubis; I: tibial tuberosity, medial side


adducts femur/thigh

orbicularis oculi

Closes eye

orbicularis oris

spincter muscle used for "puckering up" and whistling


smiling muscle


a large muscle that raises the lower jaw and is used in chewing

internal oblique

compresses abdomen, middle layer; fibers point up to the head


O: Sternal clavicle or manubrium. I: Mastoid region and lateral nuchal line. A: Flex neck or bend head toward shoulder while turning face to opposite side.

pectoralis minor

a skeletal muscle that draws down the scapula or raises the ribs

pectoralis major

a skeletal muscle that adducts and rotates the arm

sarratus anterior

Origin: ribs 1-8 / Insertion: Medial border of scapula / Action: prime mover: protracts scapula

internal intercostals

Muscles between ribs used for breathing, Depresses ribs for Expiration

rectus abdominus

major spine flexor, forms 6 pack and translates to "straight muscle of abdomen"

external oblique

origin is lower 8 ribs, compresses abdomen; most external of abdominal muscles


..., flexes forearm at elbow


either of two flat triangular muscles of the shoulder and upper back that are involved in moving the shoulders and arms

transversus abdominus

compresses abdomen


the face or front of a building, forehead muscle (Raises eyebrow andfacial expressions)


Flexes Elbow

flexor carpi radialis

flexes wrist and abducts hand


flexes elbow

triceps brachii

the skeletal muscle having three origins that extends the forearm when it contracts

biceps brachii

a muscle that flexes and supinates the forearm

pronator teres

Pronates forearm and assists in flexing the elbow


a large triangular muscle covering the shoulder joint and serving to abduct and flex and extend and rotate the arm

palmaris longus

flexes wrist


depresses hyoid


muscle extending from the temporal fossa to the coronoid process of the mandible


Draws angles of the mouth laterally; draws lips into the grinning expression


compresses cheek, allowing for rapid changes in volume of mouth cavity

flexor carpi ulnaris

flexes and adducts wrist

flexor digitorum superficialis

Flexes Proximal Interphalangeal Joints and Secondarily Metacarpophalangeal joints and Wrists


a structure between bones, such as the muscles between the metacarpals


In: median nerve

A: flex digits at MCPs and extends at interphalangeal joints

gluteus maximus


gluteus medius

the middle of the three gluteal muscles

linea alba

midline of chest where abdominal aponeuroses meet


(anatomy) a muscular partition separating the abdominal and thoracic cavities

external intercostals

Elevates ribs during inspiration


pelvic floor

levator ani

Forms the floor of pelvic cavity; assists in defecation

levator scapulae

Elevates scapula

rhomboideus major

can raise and adduct the scapula

lattisimus dorsi

adducts and extends upper arm/shoulder


Rotates arm medially


Rotates arm laterally


abducts arm

teres major

Medially rotates and adducts the arm


Flexes and adducts the humerus


Supinates forearm

levator palpabrae

Closes the eye

Please allow access to your computer’s microphone to use Voice Recording.

Having trouble? Click here for help.

We can’t access your microphone!

Click the icon above to update your browser permissions above and try again


Reload the page to try again!


Press Cmd-0 to reset your zoom

Press Ctrl-0 to reset your zoom

It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.

Please upgrade Flash or install Chrome
to use Voice Recording.

For more help, see our troubleshooting page.

Your microphone is muted

For help fixing this issue, see this FAQ.

Star this term

You can study starred terms together

NEW! Voice Recording