anatomy & physiology muscles flashcards _ quizlet
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Anatomy and Physiology MusclesTRANSCRIPT
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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
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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
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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
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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
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Biceps BrachiiDescription: Biceps, double headed,from humerus to ulna
Action: Flexion of forearm
BrachialisDescription: Deep to biceps, humerusto ulna
Action: Flexion of forearm
BrachioradialisDescription: Outside of forearm,humerus to radius
Action: Flexion of forearm
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
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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
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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
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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
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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 ...