practical 2 - muscle actions Flashcards by Emily Koenig

Q

rectus abdominis

A

flexion of trunk

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Q

external oblique

A

rotation of trunk to opposite side

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Q

internal oblique

A

rotation of trunk to same side

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Q

transversus abdominis

A

compression of trunk

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Q

external intercostals

A

inhalation

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Q

internal intercostals

A

exhalation

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Q

innermost intercostals

A

exhalation

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Q

erector spinae

A

rotation to same side

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Q

what happens if both erector spinae contract simultaneously?

A

extension of trunk

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Q

sternocleidomastoid

A

rotation to opposite side

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Q

what happens if both sternocleidomastoid muscles contract simultaneously?

A

flexion of the neck

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Q

serratus anterior

A

protraction of scapula

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Q

pectoralis minor

A

protraction of scapula

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Q

rhomboid major

A

retraction of scapula

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Q

rhomboid minor

A

retraction of scapula

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Q

levator scapulae

A

elevation of scapula

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Q

trapezius

A

elevation of scapula

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Q

subscapularis

A

medial rotation of shoulder

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Q

suprascapularis

A

abduction of shoulder

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Q

infraspinatus

A

lateral rotation of shoulder

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Q

teres minor

A

lateral rotation of shoulder

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Q

teres major

A

medial rotation of shoulder

Q

pectoralis major

A

flexion of shoulder

Q

latissimus dorsi

A

extension of shoulder

lateral deltoid

abduction of shoulder

posterior deltoid

lateral rotation of shoulder

anterior deltoid

medial rotation of shoulder

biceps brachii

flexion of elbow

brachialis

flexion of elbow

triceps brachii

extension of elbow

flexor digitorum profundus

flexion of fingers

extensor digitorum

extension of fingers

gluteus maximus

extension of hip

gluteus medius

abduction of hip

gluteus minimus

abduction of hip

are the glute muscles used during the gait cycle?

yes, they abduct so the opposite foot does not drag on the ground

biceps femoris

flexion of knee

semitendinosus

flexion of knee

semimebranosus

flexion of knee

hip ligaments

flex and pull into the acetabulum

iliopsoas (psoas major and iliacus)

flexion of hip

sartorius

flexion of hip

rectus femoris

flexion of hip

vastus lateralis

extension of knee

vastus medialis

extension of knee

vastus intermedius

extension of knee (and flexion of hip)

gracilis

flexion of knee

adductor magnus

adduction of hip

adductor longus

adduction of hip

adductor brevis

adduction of hip

gastrocnemius

plantar flexion of ankle

extensor digitorum longus

extension of toes

flexor digitorum longus

flexion of toes