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A&P Lab > Block 1: Muscles & Functions > Flashcards

Block 1: Muscles & Functions Flashcards

Face: facial expression & mastication Neck Abdomen Thorax: Superficial, Deep, Ventilation Shoulder & Back: Superficial & Deep (Rotator Cuff)

1
Q

frontalis

A

raise eyebrows

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2
Q

occipitalis

A

pulls scalp posteriorly

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3
Q

orbicularis oculi

A

closes eye

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4
Q

orbicularis oris

A

closes and protrudes lips

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5
Q

buccinator

A

manipulate food during chewing

expels air through pursed lips

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6
Q

zygomaticus major

A

pulls angle of mouth superiorly and laterally

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7
Q

zygomaticus minor

A

raises lateral portion of upper lip

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8
Q

platysma

A

depresses lower lip
depresses mandible
tenses skin of neck

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9
Q

masseter

A

elevates mandible

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10
Q

temporalis

A

elevates and retracts mandible

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11
Q

diagastric

A

depresses mandible

fixator of hyoid bone during swallowing

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12
Q

mylohyiod

A

elevates hyoid bone & floor of mouth

assist tongue in pushing food towards the pharynx

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13
Q

sternohyoid

A

depresses hyoid bone and larynx

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14
Q

sternocleidomastoid (bilateral action)

A

bilateral action (together) = flexes head

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15
Q

sternocleidomastoid (unilateral action)

A

unilateral action (singular) = flex and rotate head toward opposite side

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16
Q

anterior, middle, and posterior scalene (bilateral action)

A

bilateral action (together) =
flexes head
elevate rib cage with vertebral column during forced inspiration

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17
Q

anterior, middle, and posterior scalene (unilateral action)

A

unilateral action (individual) = rotate head laterally

18
Q

external oblique (unilateral action)

A

unilateral action (individual) = laterally bends the trunk

19
Q

internal oblique (unilateral action)

A

unilateral action (individual) = laterally bends the trunk

20
Q

transverse abdominus (unilateral action)

A

unilateral action (individual) = laterally bends the trunk

21
Q

external oblique, internal oblique, and transverse abdominus (bilateral action)

A 
bilateral action (together) = 
flexes the trunk
with vertebral column fixed, compresses the contents of the abdomen
22
Q

linea alba (what is it)

A

vertical white line on abdomin

23
Q

tendinous intersections (what is it)

A

lateral white lines on abdomin

24
Q

Rectus sheath (what is it)

A

covering of rectus abdominus

25
Q

pectoralis major

A

flexes & adducts the arm

rotates arm medially

26
Q

pectoralis minor

A

protracts and depresses the scalpula

27
Q

serratus anterior

A

protracts scapula

assists in upward rotation of scapula

28
Q

diaphram

A

flattens to lower floor of thoracic cavity, increasing volume

29
Q

external intercostals

A

elevates rib cage

30
Q

trapezious

A

extends the head
retracts the scapula
depresses scapula
rotates scapula upward

31
Q

deltoid

A

abducts the arm

secondarily flexes and extends arm

32
Q

latissimus dorsi

A

adducts & extends the arm

33
Q

supraspinatus (function & component of what?)

A

Function =
assists in abduction of arm
holds the humerus & stabilizes shoulder joint

Component of = rotator cuff muscles

34
Q

infraspinatus (function & component of what?)

A

Function =
rotates arm laterally
stabilizes shoulder joint

Component of = rotator cuff muscles

35
Q

subscapularis (function & component of what?)

A

Function =
adducts & rotates arm medially
stabilizes shoulder joint

Component of = rotator cuff muscles

36
Q

teres minor (function & component of what?)

A

Function =
rotates arm laterally
stabilizes shoulder joint

Component of = rotator cuff muscles

37
Q

levator scapulae

A

elevates scapula

38
Q

Rhomboid Major & Minor

A

retracts scapula

39
Q

Teres Major

A

adducts & extends arm

rotates arm medially

40
Q

splenius capitis

A

extends the head

rotates the head to the same side

A&P Lab (4 decks)

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