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Anatomy > Muscle Actions > Flashcards

Muscle Actions Flashcards

(71 cards)

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1
Q

Supraspinatus, infraspinatus, teres minor, subscapularis

A

rotator cuff muscles: together, stabilize and rotate glenohumeral joint
supraspinatus: abduct
infraspinatus and teres minor (below spine): adduct and lateral rotation
subscapularis: medial rotation

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2
Q

Teres Major

A

extends, adducts, and medially rotates arm

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3
Q

Latissimus Dorsi

A

extends adducts and medially rotates arm

draws arm inferiorly and posteriorly

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4
Q

Deltoid

A

abducts, flexes, extends, and rotates arm

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5
Q

Pectoralis Major

A

Flexes, adducts, and medially rotates arm

will do extension of humerus is not in neutral position

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6
Q

Triceps Brachii

A

extends forearm and assists in arm adduction

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7
Q

Biceps Brachii

A 
flexes arm (glenohumeral joint)
flexes and supinates forearm (elbow joint)
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8
Q

Coracobrachialis

A

adducts and flexes arm (glenohumeral joint)

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9
Q

Brachialis and Brachioradialis

A

flex forearm (elbow joint)

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10
Q

Pronator Teres

A

pronates forearm

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11
Q

Flexor Carpi Radialis

A

flexes wrist, abducts hand

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12
Q

Palmaris Longus

A

weakly flexes wrist, tenses fascia of palm

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13
Q

Flexor Carpi Ulnaris

A

flexes wrist, adducts hand

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14
Q

Flexor Digitorum Superficialis

A

flexes wrist

flexes 2nd-5th MP and PIP joints

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15
Q

Flexor Digitorum Profundus

A

flexes wrist

flexes 2nd-5th MP, PIP, and DIP joints

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16
Q

Extensor Carpi Radialis Longus and Brevis

A

extends wrist

abducts hand

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17
Q

Extensor Carpi Ulnaris

A

extends wrist

adducts hand

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18
Q

Extensor Digitorum

A

extends wrist

extends 2nd-5th MP, PIP, and DIP joints

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19
Q

Abductor Pollicis Longus

A

abducts thumb

weakly extends wrist

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20
Q

Extensor Pollicis Longus

A

extends MP and IP joints of thumb

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21
Q

Extensor Pollicis Brevis

A

extends MP joint of thumb

weakly extends wrist

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22
Q

Supinator

A

supinates forearm

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23
Q

Rectus Femoris

A

extends leg

flexes thigh

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24
Q

Vastus Lateralis, Medialis, and Intermedius

A

extends leg

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25
Sartorius
flexes, abducts, and laterally rotates thigh | flexes leg and rotates leg medially (sitting crosslegged)
26
Iliacus and Psoas Major
Flex thigh
27
Pectineus, Adductor Longus, and Adductor Brevis
adduct thigh | weakly flex thigh
28
Adductor Magnus
adducts thigh | flexes or extends and laterally rotates thigh (depending on starting position)
29
Gracilis
weakly adducts and weakly flexes thigh | flexes leg
30
Semitendinosus and Semimembranosus
extend thigh flex leg medially rotate leg
31
Biceps Femoris
extends thigh (only long head) flexes leg laterally rotates leg
32
Tensor Fasciae Latae
abducts thigh | medially rotates thigh
33
Gluteus Maximus
extends thigh | laterally rotates thigh
34
Gluteus Medius and Gluteus Minimus
abducts thigh | medially rotates thigh
35
Piriformis
laterally rotates thigh
36
Tibialis Anterior
dorsiflexes foot | inverts foot
37
Extensor Digitorum Longus
extends toes 2-5 | dorsiflexes foot
38
Extensor Hallicus Longus
extends hallux | dorsiflexes foot
39
Fibularis longus and brevis
everts foot | weakly plantar flexes foot
40
Gastrocnemius
plantar flexes foot | flexes leg
41
Soleus
plantar flexes foot
42
Tibialis Posterior
plantar flexes foot | inverts foot
43
Flexor Digitorum Longus
plantar flexes foot | flexes toes 2-5, MP, PIP, and DIP joints
44
Flexor Hallicus Longus
plantar flexes foot | flexes MP and IP joints of hallux
45
Frontalis
draws scalp forward raises eyebrows wrinkles forehead
46
Occipitalis
draws scalp backward
47
Orbicularis Oculi
closes eye (blink muscle)
48
Orbicularis Oris
compresses and purses lips (kiss muscle)
49
Platysma
pulls lower lip inferiorly | tenses skin of neck
50
Zygomaticus Major and Minor
pull corners of mouth superiorly (smiling muscles)
51
Buccinator
presses cheeks against molar teeth, as in chewing, whistling, playing a wind instrument, and suckling in infants
52
Temporalis
elevates and retracts mandible
53
Masseter
elevates and protracts mandible | jaw closure
54
Sternocleidomastoid
one side: lateral flexion with rotation of head to opposite side both sides: flexes head and neck
55
Splenius Capitis and Splenius Cervicus
one side: turn head to same side | both sides: extend head and neck
56
Erector Spinae Groups (iliocostalis, longissimus, spinalis)
one side: laterally flex the vertebral column | both sides: extend vertebral column
57
Quadratus Lumborum
one side: laterally flexes the vertebral column both sides: extend vertebral column (same as erector spinae groups)
58
External Intercostals
elevate ribs during normal inhalation
59
Internal Intercostals
depress ribs during forced exhalation
60
Diaphragm
expands the thoracic cavity during normal inhalation
61
External and Internal Obliques, Transversus Abdominus
one side: laterally flex vertebral column | both sides: flex vertebral column and compress abdominal wall
62
Rectus Abdominus
flexes vertebral column and compresses abdominal wall
63
Scalenes
flex head if ribs fixed | lift ribs during inspiration if head fixed
64
Pterygoid Muscles
side to side movement of mandible, grinding
65
Digastric Muscle
depresses the mandible
66
Pharynx and Larynx Muscles
constrictor muscles - change diameter of pharynx, larynx and esophagus to allow swallowing move shape of larynx to make different sounds
67
Serratus Anterior
protracts and stabilizes scapula | superiorly rotates scapula
68
Trapezius
superior: elevates and superiorly rotates scapula; elevates clavicle middle: retracts scapula inferior: depresses scapula; extends head
69
Levator scapulae
elevates scapula (inferiorly rotates scapula)
70
Pectoralis minor
protracts and depresses scapula
71
Rhomboid major and minor
elevates and retracts (adducts) scapula; | rotates scapula inferiorly

Anatomy (7 decks)

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