Chapter 10 Muscles Flashcards

1
Q

frontalis (frontal belly)

A

raises the eyebrows

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2
Q

orbicularis oculi

A

closes eyes, blinking

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3
Q

zygomaticus (major and minor)

A

smiling muscle

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4
Q

risorius

A

draws corner of lip laterally

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5
Q

orbicularis oris

A

closes lips, kissing,

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6
Q

buccinator

A

compresses cheek as in whistling and sucking

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7
Q

Mastication

A

chewing, 4 pairs of muscles involved, masseter and temporalis muscles are prime movers

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8
Q

masseter

A

prime mover of jaw closure

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9
Q

temporalis

A

closes jaw

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10
Q

sternocleidomastoid

A

major head flexors; flexes and laterally rotates the head

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11
Q

external intercostal muscles

A

considered inspiratory muscles; pull ribs toward one another to elevate rib cage

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12
Q

diaphragm

A

most important muscle of inspiration; prime mover of inspiration

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13
Q

internal intercostals

A

draws ribs together and depress rib cage

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14
Q

rectus abdominis

A

flex and rotate lumbar region of vertebral column

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15
Q

transversus abdominis

A

compresses abdominal contents

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16
Q

trapezius

A

stabilizes, elevates, retracts and rotates scapula

17
Q

pectoralis major

A

adducts and medially rotates arm

18
Q

deltoid

A

site for intramuscular injection; prime mover of arm abduction

19
Q

triceps brachii

A

powerful forearm extensor

20
Q

biceps brachii

A

flexes and supinates forearm

21
Q

brachialis

A

a major forearm flexor

22
Q

quadriceps femoris

A

powerful knee extensor used in climbing, jumping, running and rising from seated position

23
Q

rectus femoris

A

extends the leg and flexes thigh at hip

24
Q

vastus lateralis

A

intramuscular injection site, extends and stabilizes leg

25
Q

vastus medialis

A

extends leg

26
Q

gluteus medius

A

intramuscular injection site, abducts and medially rotates thigh

27
Q

gluteus maximus

A

major extensor of thigh

28
Q

hamstrings

A

fleshy muscles of the posterior thigh, cross hip and knee joints and are prime movers of thigh extension and knee flexion

29
Q

biceps femoris

A

extends thigh and flexes leg

30
Q

semitendinosus

A

extends thigh and flexes leg

31
Q

semimembranosus

A

extends thigh and flexes leg