Anatomy & Physiology Muscles Flashcards _ Quizlet

9/10/2015 Anatomy & Physiology: Muscles flashcards | Quizlet

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Anatomy & Physiology: Muscles53 terms by Boston3346

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Frontalis (Frontal Belly)Description: Part of the Epicranius,above each eyebrow, starts at the topof the nose

Action: Raises eyebrows, wrinklesbrow

Occipitalis (Occipital Belly)Description: Part of the epicranius,back of the skull.

Action: Pull scalp posteriously

PlatysmaDescription: From bottom of chin,down neck to top of the chest

Action: Tenses skin of neck, depressesmandible, pulls lower lip back anddown

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Orbicularis OculiDescription: Round muscle whichsurrounds each eye

Action: Blinking, squinting, drawseyebrows down

RisoriusDescription: Inferior to zygomaticus,parallel to edge of mouth

Action: Draws corner of lip laterally,tenses lip

Orbicularis OrisDescription: Circular muscle aroundlips, fibers run in different directions

Actions: Closes lips, whistles, kiss

Zygomaticus Major/MinorDescription: Major/Minor(large/small), diagonally form cornerof the mouth to the zygomatic bone

Action: Smiling, pulls the corners ofthe mouth

Levator Labii SuperiorisDescription: Above lips and beloweyes, connects to zygomatic bone andupper lip

Action: Raises and furrows upper lip,opens lip

Depressor Labii InferiorisDescription: Small muscle, lower lip tojaw

Action: Draws lower lip inferiorly



MasseterDescription: jaw, chewing, corner ofjaw to zygomatic arch

Action: Prime mover of jaw closure,elevates mandible

TemporalisDescription: Fan shaped, side of theskull

Action: Closes jaw, elevates andretracts mandible

SternocleidomastoidDescription: Deep to Platysma,manubrium of sternum and clavicle tomastoid process of temporal bone

Action: Flexion of neck forward, rotateof head toward shoulder on oppositeside

Rectus AbdominisDescription: Six pack, Linea Alba(middle line), tendinous intersections(sideways lines), from pubic crest andsymphysis to ribs

Action: Flexes and rotates vertebralcolumn

External ObliqueDescription: most superficial, fibers atangle, from last 5 ribs to linea alba andpubic crest and iliac crest

Action: Flexes and rotates vertebralcolumn, trunk rotation, lateral flexion



Internal ObliqueDescription: Fibers at angle, underexternal oblique

Action: Trunk rotation, lateral flexion

Transverse AbdominisDescription: Deepest muscle ofabdominal wall

Action: Compresses abdominalcontents

TrapeziusDescription: Triangular, superiormuscle of back, goes from upper neckto thoracic vertebrae

Action: Extends head, raises, rotates,and retracts (abducts) scapula

Rhomboideus MajorDescription: Underneath Trapezius,from thoracic vertebrae to scapula

Action: Retraction of scapula medially,rotate glenoid cavity downward

Serratus AnteriorDescription: Fan shaped, deep toScapula, under arm, above obliques

Action: Rotates scapula, prime moverto protract and hold scapula

Teres MajorDescription: Inferior to Teres Minor,posterior surface at inferior angle ofscapula to humerus

Action: Extends, medially rotates, andadducts humerus



SupraspinatusDescription: Under Trapezius, on topof scapula, connects to humerus, partof Rotator Cuff

Action: Initiates abduction of humerus

InfraspinatusDescription: Partially covered byDeltoid and Trapezius, belowsupraspinatus on scapula, connects tohumerus, Rotator Cuff

Action: Lateral rotation of humerus

Teres MinorDescription: Inferior to Infraspinatus,above Teres Major, scapula tohumerus

Action:

Pectoralis MajorDescription: Fan shaped, coveringupper chest

Action: Prime mover of arm flexion,adducts and medially rotates arm

Latissimus Dorsi Description: Broad, flat muscle of thelower back, vertebrae to humerus

Action: Extension, adducts, mediallyrotates arm

Deltoid Description: Flesy, triangular musclethat forms shoulder, from clavicle,acromion and spine of scapula tohumerus

Action: Arm Abduction



Biceps BrachiiDescription: Biceps, double headed,from humerus to ulna

Action: Flexion of forearm

BrachialisDescription: Deep to biceps, humerusto ulna


BrachioradialisDescription: Outside of forearm,humerus to radius


Triceps BrachiiDescription: Sole, large fleshy muscleof posterior of arm, top humerus toolecranon process of ulna

Action: Extension of forearm

Flexor Carpi RadialisDescription: Runs diagonally acrossforearm, next to brachioradialis,humerus to metacarpals

Action: Flexion of wrist, abducts hand

Palmaris LongusDescription: Between flexor carpiradialis and flexor carpi ulnaris,humerus to skin and fascia of palm

Action: Flexes wrist, tenses skin andfascia of palm



Extensor DigitorumDescription: Middle forearm, splitsinto 4 tendons that go to fingers

Action: Finger extension, extendswrist, abduct fingers

Extensor Carpi Radialis LongusDescription: Parallels brachioradialis,along thumb side

Action: Extends and adducts wrist

Extensor Carpi UlnarisDescription: Next to ExtensorDigitorum, extends to before pinky

Action: Extends and adducts wrist

Gluteus MaximusDescription: Butt muscle

Action: Thigh extension

Gluteus MediusDescription: Above and partially underGluteus Maximus

Action: Abducts and medially rotatesthigh

Adductor LongusDescription: From pelvis to femur,inside of the leg, above AdductorMagnus and Brevis

Action: Adduct and medially rotateand flex thigh



Adductor MagnusDescription: Below Adductor Longus

Action: Adduct and medially rotateand flex thigh

Tensor Fasciae LataeDescription: Outside of leg

Action: Flexes, abducts, and mediallyrotates thigh

IliopsoasDescription: Made up of Illacus andPsoas Major, next to and on ilium

Action: Flexes, abducts, and laterallyrotates thigh

PectineusDescription: Higher above AdductorLongus

Action: Adducts, flexes, and mediallyrotates thigh



GracilisDescription: Inside of leg, superficial

Action: Adducts thigh, flexes andmedially rotates leg

SartoriusDescription: Superficial musclerunning diagonally across thigh fromoutside at ilium to inside at knee

Action: Flexes, abducts, and laterallyrotates thigh

Rectus FemorisDescription: Superficial, runs straightdown, large

Action: Extends knee and flexes thigh

Vastus LateralisDescription: Outside of thigh, underTensor Fasciae Latae

Action: Extends knee

Vastus IntermediusDescription: Underneath RectusFemoris, between Vastus Lateralis andVastus Medialis

Action: Extends Knee

Vastus MedialisDescription: Inside of thigh, underSartorius

Action: Extends Knee



Biceps Femoris Description: Outside of leg, underGluteus Maximus

Action: Extends thigh

Semitendinosus Description: Inside of leg, next toBiceps Femoris

Action: Extends thigh, flexes knee

SemimembranosusDescription: Deep to Semitendinosus

Action: Extends thigh, flexes knee

Tibialis Anterior Description: Outside of bone,superficial

Action: Dorsiflexion

Peroneus Longus ...

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Anatomy & Physiology Muscles Flashcards _ Quizlet