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anatomy (davis) > muscle functions > Flashcards

muscle functions Flashcards

1
Q

Epicranius Frontalis

A

raises eyebrows

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2
Q

obicularis oculi

A

closes eyes

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3
Q

zygomaticus

A

smiling muscle

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4
Q

orbicularis oris

A

closes lips, kissing muscle

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5
Q

masseter

A

closes jaws

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6
Q

buccinator

A

compresses cheek (as in whistling)

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7
Q

sternocleidomastoid

A

flexation of neck forward
rotates head toward opposite shoulder

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8
Q

pectoralis major

A

arm flexion adducts

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9
Q

deltoid

A

arm abduction

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10
Q

rectus abdominis

A

flexes and rotates vertebral column

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11
Q

biceps brachii

A

flexes elbow and supinates forearm

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12
Q

pronator teres

A

pronates forearm

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13
Q

flexor carpi radialis

A

powerful wrist flexor

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14
Q

trapezius

A

extends neck
raises, rotates, and retracts scapula

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15
Q

erector spinae

A

all act to extend and bend the vertebral column

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16
Q

triceps brachii

A

powerful forearm extensor, antagonist of biceps brachii

17
Q

extensor carpi radialis longus

A

extends and abducts wrist

18
Q

extensor digitorium

A

prime mover of finger extension
extends wrist
can flare (adduct) fingers

19
Q

sartorius

A

flexes, abducts, and laterally rotates thigh, flexes knee

20
Q

rectus femoris

A

extends knee and flexes thigh at hip

21
Q

vastus lateralis

A

extends and stablizes knee

22
Q

vastus medialis

A

extends knee

23
Q

vastus intermedius

A

extends knee

24
Q

tibialis anterior

A

prime mover of dorsiflexion; inverts foot

25
Q

exterior digitorium longus

A

prime mover of toe extension

26
Q

gluteus maximus

A

powerful hip extensor (used most when climbing stairs)

27
Q

biceps femorus

A

extends thigh
laterally raises knee

28
Q

semitendinosus

A

extends thigh
flexes knee
medially rotates leg

29
Q

semimembranosus

A

extends thigh
flexes knee
medially rotates leg

30
Q

gastrocnemius

A

plantar flexes foot
crosses knee joint
flexes knee when foot is dorsiflexed

31
Q

soleus

A

plantar flexes foot

anatomy (davis) (2 decks)

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