Actions of Muscles Flashcards
frontalis ( epicranius frontal )
action: raises eyebrows
orbicularis oculi
action: closes eyes
zygomaticus
action: smiling muscle
orbicularis oris
action: purses lips “ kissing muscle “
massester
action: closes jaw “ chewing muscle “
sternocleidomastoid
action: cervical rotation and lateral flexion
platysma
action: tenses skin of neck
sternohyoid
action: depresses hyoid
pectoralis major
action: ADDucts shoulder
pectoralis minor
action: draws scapula forward
serratus anterior
action: draws scapula forward “ boxing muscle “
external intercostal
action: elevates rib cage, aids inspiration
internal intercostal
action: decreases rib cage, aids expiration
external oblique
action: flexes and rotates trunk
internal oblique
action: flexes and rotates trunk
transverse abdominis
action: compresses abdominal contents
rectus abdominis
action: flexes trunk, compresses abdomen
trapezius ( upper, middle, lower )
action: elevates, depresses, retracts scapular, extends c-spine
latissimus dorsi
action: ADDucts shoulder
erector spinae
action: extends vertebral column
deltoid
action: flex, ABDucts, or extends shoulder
rhomboids ( minor & major )
action: pulls scapulae medially
supraspinatus
action: synergist with deltoid, stabilizes shoulder
infraspinatus
action: rotates humerus laterally, stabilizes shoulder
subscapularis
action: rotates humerus medially, stabilizes shoulder
teres minor
action: rotates humerus laterally, stabilizes shoulder
teres major
action: synergist with latissimus dorsi
biceps brachii
action: flexes elbow, supinates forearm
brachialis
action: flexes elbow
triceps brachii
action: extends elbow
brachioradialis
action: flexes elbow
flexor capris radialis
action: flexes wrist
palmar longus
action: flexes wrist
flexor capri ulnaris
action: flexes wrist
extensor digitorum
action: extends wrist and fingers
sartorius
action: flexes and externally rotates hip, flexes knee
gracilis
action: ADDucts hips
adductor magnus
action: ADDucts hips
adductor longus
action: ADDucts hips
adductor brevis
action: ADDucts hips
biceps femoris
action: flexes knee, extends thigh
semimembranous
action: flexes knee, extends thigh
semitendinosus
action: flexes knee, extends thigh
rectus femoris
action: flexes hip, extends knee
vastus lateralis
action: extends knee
vastus medialis
action: extends knee
vastus intermedius
action: extends knee
tensor fascia lata
action: ABDucts hips
gluteus maximus
action: extends hips
gluteus medius
action: ABDucts hips
illopsoas
action: flexes hips
pectineus
action: flexes and ADDucts hips
gastrocnemius
action: plantarflexes ankle
soleus
action: plantarflexes ankle
tibialis anterior
action: dorsiflexes ankle
