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A&P > Muscles > Flashcards

Muscles Flashcards

1
Q

two part muscle consisting out frontal and occipital bellies; the alternate actions of these two muscles pull scalp forward and back

A

epicranius

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2
Q

pulls eyebrow medially and inferiorly

A

corrugator supercili

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3
Q

closes eye, pulls eyebrow inferiorly, smiling muscle

A

zygomaticus

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4
Q

raises lateral corners of mouth

A

orbicularis oculi

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5
Q

pulls corner of lip laterally, tenses lips

A

risorius

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6
Q

opens lips, raises and furrows upper lip

A

levator labii superioris

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7
Q

pulls lower lip inferiorly as in a pout

A

depressor labii inferioris

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8
Q

pulls corners of mouth down and laterally as in a grimace

A

depressor anguli oris

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9
Q

closes lips, kissing and whistling

A

orbicularis oris

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10
Q

wrinkles chin, protrudes lower lip

A

mentalis

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11
Q

compresses cheek, holds food between teeth during chewing, well developed in nursing infants

A

buccinator

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12
Q

tenses skin of neck, helps depress mandible

A

platysma

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13
Q

muscle used in smiling

A

zygomaticus major

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14
Q

muscle used in puckering

A

orbicularis oris

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15
Q

muscle used in pouting

A

mentalis

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16
Q

muscle used in tensing neck

A

platysma

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17
Q

muscle used in angry eyebrows

A

corrugator supercili

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18
Q

muscle used in blinking

A

orbicularis oculi

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19
Q

muscle used in raising eyebrows to wrinkle forehead

A

frontal belly of epicranius

20
Q

prime mover of jaw closer, elevates mandible

A

masseter

21
Q

closes jaw, maintains the position of the mandible at rest

A

temporalis

22
Q

protracts tongue

A

gleniglossus

23
Q

depresses tongue

A

hypoglossus

24
Q

retracts and elevates tongue

A

styloglossus

25
Q

flexes and laterally rotates head

A

sternocleidomastoid

26
Q

elevate the first two ribs, aids in inspiration, flex and rotate neck

A

scalenes

27
Q

prime mover of back extension, helps control the action of bending forward at the waist, powerful extensors to promote return to erect position

A

erector spinae

28
Q

iliocostalis, longissimus, and spinalis

A

three columns of erector spinae

29
Q

pulls scapula forward and downward, pulls rib cage superiorly

A

pectoralis minor

30
Q

raises point of shoulder, important role in abducting and raising arm and in horizontal arm movements, “boxer’s muscle”

A

serratus anterior

31
Q

stabilizes, elevates, retracts, and rotates scapula, shrugging shoulders, O: occipital bone I: acromion, spine of scapula, and thoracic vertebrae

A

trapezius

32
Q

tilts glenoid cavity downward when scapula is fixed

A

levator scapulae

33
Q

stabilize scapula, retract/adduct scapula thus squaring shoulders

A

rhomboids

34
Q

adducts and medially rotates arm, helps in climbing, throwing, pushing, and forced inspiration, O: sternal end of clavicle, I: fibers converge to insert into short tendon on the greater tubercle of humerus

A

pectoralis major

35
Q

prime mover of arm abduction when all its fibers contract simultaneously, antagonist of pectoralis major and latissimus dorsi, O: lateral third of clavicle, acromion and spine of scapula, I: humerus

A

deltoid

36
Q

prime mover of arm extension, medially rotates arm, with arms fixed overhead it pulls the rest of the body upward like in chinups, O: spines of lower thoracic vertebrae I: humerus

A

latissimus dorsi

37
Q

rotates arm medially, helps hold head of humerus in glenoid cavity, stabilizing the shoulder joint, O: scapula I: humerus

A

subscapularis

38
Q

initiates abduction of arm, helps prevent download dislocation of humerus like when carrying a heavy suitcase

A

supraspinatus

39
Q

rotates arm laterally, holds head of humerus in glenoid cavity

A

infraspinatus

40
Q

same as infraspinatus: rotates arm laterally, holds head of humerus in glenoid cavity

A

teres minor

41
Q

extends, medially rotates, and adducts arm

A

teres major

42
Q

flexes and adducts arm, synergist of pectoralis major

A

coracobrachialis

43
Q

powerful forearm extensor, antagonist of forearm flexors, O: scapula, I: ulna

A

triceps brachii

44
Q

flexes and supinates forearm, O: scapula, I: radius

A

biceps brachii

45
Q

major forearm flexor, lifts ulna as biceps lifts the radius, O: humerus, I: ulna

A

brachialis

46
Q

synergist in flexing forearm, stabilizes elbow during rabid flexion and extension, O: distal end of humerus I: radius

A

brachioradialis

A&P (5 decks)

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