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Muscle Actions
Muscle actions
69
Anatomy
Undergraduate 1
12/04/2017
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Term
Frontalis
 Definition
raises eyebrows
Term
Orbicularis Oculi
 Definition
Closes eyes; winking
Term
Zygomaticus Minor and Major
 Definition
raises corners of mouth; smiling
Term
Buccinator
 Definition
compresses cheek
Term
Temporalis
 Definition
closes jaw
Term
Masseter
 Definition
closes jaw
Term
Orbicularis Oris
 Definition
purses lips; kissing
Term
Mentalis
 Definition
protrudes lower lip; pouting
Term
Platysma
 Definition
opens jaw
Term
Digastric
 Definition
opens jaw
Term
Sternocleidomastoid
 Definition
flexes neck; turns head slightly
Term
Splenius
 Definition
entends neck; turns head
Term
Pectoralis Major
 Definition
flexes and adducts arm
Term
Pectoralis Minor
 Definition
draws scapula forward
Term
Serratus Anterior
 Definition
draws scapula forward; boxing
Term
Deltoid
 Definition
abducts arm
Term
External Intercostals
 Definition
elevates ribs during inspiration
Term
Internal Intercostals
 Definition
depresses ribs during forced expiration
Term
Rectus Abdominis
 Definition
flexes vertebral column
Term
External Oblique
 Definition
flexes vertebral column; rotates trunk
Term
Internal Oblique
 Definition
flexes vertebral column; rotates trunk
Term
Transverse Abdominis
 Definition
compresses abdomen
Term
Trapezius
 Definition
extends head; stabilizes neck and shoulder
Term
Latissimus Dorsi
 Definition
adducts arm; draws arm downward
Term
Teres Major
 Definition
synergist to latissimus dorsi
Term
Teres Minor
 Definition
rotates humerus; stabilizes shoulder joint
Term
Infraspinatus
 Definition
rotates humerus; stabilizes shoulder joint
Term
Subscapularis
 Definition
rotates humerus; stabilizes shoulder joint
Term
Supraspinatus
 Definition
rotates humerus; stabilizes shoulder joint
Term
Rhomboid Major and Minor
 Definition
pulls scapula medially; squares shoulders
Term
Levator Scapulae
 Definition
elevates scapula; shrugging
Term
Erector Spinae
 Definition
bends vertebral column laterally
Term
Quadratus Lumborum
 Definition
flexes vertebral column laterally
Term
Triceps Brachii
 Definition
extends forearm
Term
Biceps brachii
 Definition
flexes forearm
Term
Brachialis
 Definition
flexes forearm
Term
Brachioradialis
 Definition
flexes forearm
Term
Flexor Carpi Radialis
 Definition
flexes wrist
Term
Palmaris Longus
 Definition
flexes wrist
Term
Flexor Carpi Ulnaris
 Definition
flexes wrist
Term
Extensor Carpi Radialis Longus
 Definition
Extends wrist
Term
Extensor Carpi Ulnaris
 Definition
extends wrist
Term
Extensor Digitorum
 Definition
extends wrist
Term
Extensor Carpi Radialis Brevis
 Definition
extends wrist
Term
Iliopsoas
 Definition
flexes thigh
Term
Adductor Magnus
 Definition
adducts thigh
Term
Adductor Longus
 Definition
adducts thigh
Term
Adductor Brevis
 Definition
adducts thigh
Term
Pectineus
 Definition
adducts thigh
Term
Gracilis
 Definition
adducts thigh
Term
Sartorius
 Definition
flexes and abducts thigh
Term
Rectus Femoris
 Definition
extends leg
Term
Vastus Lateralis
 Definition
extends leg
Term
Vastus Intermedius
 Definition
extends leg
Term
Vastus Medialis
 Definition
extends leg
Term
Tensor Fasciae Latae
 Definition
Abducts thigh
Term
Gluteus Maximus
 Definition
extends thigh
Term
Gluteus Minimus
 Definition
abducts thigh
Term
Biceps Femoris
 Definition
extends thigh; flexes leg
Term
Semitendinosus
 Definition
extends thigh; flexes leg
Term
Semimembranosus
 Definition
extends thigh; flexes leg
Term
Tibialis Anterior
 Definition
dorsiflexion
Term
Extensor Digitorum Longus
 Definition
dorsiflexion; toe extension
Term
Fibularis Longus
 Definition
plantar flexion
Term
Fibularis Brevis
 Definition
plantar flexion
Term
Gastrocnemius
 Definition
plantar flexion
Term
Soles
 Definition
plantar flexion
Term
Flexor Hallicus Longus
 Definition
plantar flexion
Term
Plantaris
 Definition
plantar flexion
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