Muscle movements Flashcards by Julia Busiek

Epicranius frontalis

Elevates eyebrows

Wrinkles forehead

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Epicranius occipitalis

Pulls scalp posteriorly

Fixes aponeruosis

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Orbicularis oris

Closes lips
Compresses lips against teeth
Protrudes lips
Shapes lips during speech
Kissing muscle

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Zygomaticus

Draws mouth superiorly and laterally

Smiling

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Buccinator

Whistling, blowing, sucking
Draws corner of mouth laterally
Keeps food between teeth

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Platysma

Draws outer part of lower lip inferiorly and posteriorly (Pout)
Depresses mandible

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Orbicularis oculi

Closes eye

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Levator palpabrae superioris

Opens eye

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Masseter

Elevates mandible

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Temporalis

Elevates and retracts mandible

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Sternocleidomastoid

Flex cervical vertebrae and head

Laterally flex and rotate head

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Splenius

Extend head

Laterally flex and rotate head

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Rectus abdominis

Flexes vertebral column
Compresses abdomen
Stabilizes pelvis

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External oblique

Compress abdomen
Flex vertebral column
Laterally flex and rotate vertebral column

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Internal oblique

Compress abdomen
Flex vertebral column
Laterally flex and rotate vertebral column

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Diaphragm

Breathing in

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External intercostals

Elevates ribs during inspiration

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Internal intercostals

Draw ribs together during forced expiration

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Pectoralis major

Flexes arm
Adducts arm
Medially rotates arm

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Pectoralis minor

Draws scapula forward and down when ribs fixed

Elevates ribs during forced inspiration when scapula fixed

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Serratus anterior

Holds scapula against chest wall
Rotates scapula
Stabilize shoulder for arm movements

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Deltoid

Abducts arm
Flex and medially rotate arm
Extend and laterally rotate arm

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Trapezius

Stabilize scapula
Elevate scapula
Extend head
Adduct scapula
Depress scapula

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Latissimus dorsi

Extends arm
Adducts arm
Medially rotate arm
Draw arm inferiorly and posteriorly

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Infraspinatus

Laterally rotate arm | Stabilize shoulder

Teres minor

Laterally rotate arm | Stabilize shoulder

Teres major

Extend arm adducts arm Medially rotate arm

Biceps brachii

Flexes forearm Supinates forearm Flexes arm

Brachialis

Flexes forearm

Tricpes brachii

Extend forearm

Brachioradialis

Flex forearm | Stabilize elbow

Pronator teres

Pronates forearm | Flexes forearm

Flexor carpi radialis

Flex hand | Abduct hand

Palmaris longus

Flexes hand

Flexor carpi ulnaris

Flex hand Adduct hand stabilize wrist

Flexor digitorum superficialis

Flexes fingers | Flexes hand

Extensor carpi radialis longus

Extend hand | Abducts hand

Extensor digitorum

Extend fingers | Extend hand

Extensor carpi ulnaris

Extend hand | Adducts hand

Abductor pollicis brevis

Abducts thumb at carpometacarpal joint

Flexor pollicis brevis

Flexes thumb at carpometacarpal and metacarpophalangeal joint

Gluteus maximus

Extend thigh Laterally rotate thigh Abduct thigh

Gluteus medius

Abducts thigh Medially rotate thigh Stabilize pelvis

Rectus femoris

Extend leg | Flex thigh

Vastus lateralis

Extend leg

Vastus medialis

Extend leg

Gracilis

Adduct thigh Flex thigh Flex leg

Adductors

Adduct thigh Flex thigh medially rotate thigh

Pectineus

Flex thigh Adduct thigh Internally rotate thigh Stabilize pelvis

Iliopsoas

Flex thigh Flex trunk Laterally flex vertebral column

Sartorius

Flex leg Flex thigh Abduct thigh Laterally rotate thigh

Tensor fasciae latae

Flex thigh Abduct thigh medially rotate thigh

Biceps femoris

Flex leg | Extend thigh

Semitendinosus

Flex leg | Extend thigh

Semimembranosus

Flex leg | Extend thigh

Tibialis anterior

Dorsiflex foot | invert foot

Extensor digitorum longus

Dorsiflex foot | Extend toes

Fibularis longus

Planar flex foot | Evert foot

Gastrocnemius

Plantarflexes foot | Flexes leg

Soleus

Plantarflex foot