Muscles Flashcards
frontalis
`elevates eyebrows, wrinkles forehead
occipitalis
draws scalp backward
orbicularis oculi
closes eyes for winking
orbicularis oris
closes and puckers lips: kissing
zygomaticus major
elevates corner of mouth for smiling
depressor anguli oris
depresses corner of mouth for frown
buccinator
pulls cheeks against teeth when chewing, moves cheek toward midline
platysma
flexes neck muscles, depresses lower lip
masseter
elevates and protracts mandible for chewing, muscle for chewing
temporalis
elevates and retracts mandible, muscle for chewing
medial and lateral pterygoids
elevates mandible and moves it side to side, muscle for chewing
genioglossus
protracts and depresses tounge
styloglossus
retracts and elevates tounge
hyoglossus
depresses side of tongue and retreacts
sternocleidomastiod
rotates head side to side, together-flex head and neck
splenius capitus
rotates head side to side, together-extend the head and neck
digastric
elevates hyoid and depresses mandible
stylohyoid
elevates hyoid
mylohyoid
elevates hyoid and raises floor of mouth
geniohyoid
elevates hyoid
sternohyoid
depresses hyoid
omohyoid
depresses hyoid
sternothyroid
depresses thyoid
thyrohyoid
depresses hyoid and raises thyroid
quadratus lumborum
together: extend the lumbar vertebral column. Each laterally flexes the vertebral column
erector spinae
work together to extend the vert. column
iliocostalis
most lateral of erector spinae
longissimus
intermediate of erector spine
spinalis
most medial of erector spinae
diaphragm
contraction pulls the central portion down, increasing vertical dimensions of the thorax
external intercostals
elevates ribs during inhalation. (contract, pull ribs upward)
internal intercostals
depresses ribs during exhalation
scalenes
elevates 1 and 2 ribs during inspiration
abdominal muscle group
compress abdominal contents and flex vertebral column
external abdominal oblique
flet vert column, compresse abdominal contents
internal oblique
flex vert. column and compress abdominal contents
transverse abdominis
flex vert. compress abdom.
rectus abdominis
flex. vert. compresse abdom.
trapezius
elevates, depresses, retracts and rotates scapula
rhomboids (major and minor)
elevate and retract scapula, pull toward midline
levator scapulae
elevates and retracts scapula
pectoralis minor
protracts and depresses scapula
serratus anterior
protacts and depresses scapula
pectoralis major
flexes, adducts, and medially rotates humerus
deltoid
abducts, flexes, and extends arm/humerus
coracobrachialis
flexes and adducts arm/humerus
terres major
extends, adducts, and medially rotates humerus
subscapularis
medially rotates arm/humerus
supraspinatus
abducts and laterally rotates arm
infraspinatus
laterally rotates arm
terres minor
laterally rotates arm
biceps brachii
flex forearm/elbow
brachialis
flex forearm/elbow
brachioradialis
flex forearm/elbow
triceps brachii
extend forearm/elbow
aconeus
extend forearm/elbow
pronator teres
pronates forearm
flexor carpi radialis
flexes wrist and abduct hand
palmaris longus
flexes wrist
flexor carpi ulnaris
flexes wrist and adducts hand
flexor digitorum superfacialis
flexes wrist and flexes digits 2-5 at MP and PIP joints
flexor digitorum profundus
flexes wrist and digits at 2-5 MP PIP and DIP
flexor pollicis longus
flexes thumb
pronator quadratus
pronates forearm
extensor carpi radialis longus
extends wrist and abducts hand
extensor carpi radialis brevis
extends wrists/abducts hand
entensor digitorum
extends wrist and extends digits 2-5 at MP PIP and DIP joints
extensor carpi ulnaris
extends wrist and adducts hand (to midline
supinator
supinates forearm
abductor pollicis longus
abducts thumb
extensor pollicis longus
extends thumb
thenar muscles
move the thumb
hypothenar
move the little finger
midpalmar muscles
move fingers 2-5-flex the MP joints and extend the PIP and DIP joints
lubricales
part of mid-palmer muscles, flex MP and extend PIP/DIP
palm interossei
midpalmer muscles, adduct fingers, flex MP and extend PIP/DIP
dorsal interossei
abduct fingers, flex MP and extend PIP/DIP
pelvic diaphragm
closes inferior opening to pelvis, supports pelvic organs
latissmus dorsi
adducts, extends, and medially rotates arm, humorous (swimmer’s muscle)
iliacus
flex the thigh/hip
psoas major
flex the thigh/hip
sartorius
also flexes leg/knee. flex thigh/hip
quadriceps femoris
extend the knee and leg (4 muscles)
rectus femoris
extend the knee/leg QF
vastus medialis
extend the knee/leg QF
vastus intermedius
extend the knee/leg
vastus lateralis
extend the knee/leg
adductors (longus, brevis, magnus)
adduct the thigh hip, also flex
pectineus
flex and adduct thigh/hip
gracilis
flex knee/leg, adduct the thigh/hip
tensor fascia latae
abduct thigh
Illiotibial band
abduct thigh
gluteus maximus
extend thigh/hip
gluteus medius
abduct thigh/hip
gluteus minimus
abduct thigh/hip
bicep femoris
extend thigh, flex the leg
semitendonosus
extend thigh, flex the leg
semimembranosus
extend thigh/flex the leg
tibialis anterior
dorsiflex and inverts foot
extensor digitorium longus
dorsiflex foot, extend digits 2-5
extensor hallucis longus
extends the big toe, dorsiflex the foot/ankle
fibular longus
plantar flex, evert the foot
fibular brevis
plantar flex, evert food
gastrocnemuius
plantar flex foot/ankle. flex leg/knee
soleus
plantar flex foot/ankle
popliteus
flexes knee/leg
flexor hallucis longus
plantar flexes foot, ankle, big toe
flexor digitorum longus
plantar flexes foot, ankle, and toes
tibialis posterior
plantar flexes foot, ankle. inverts foot
extensor digitorum brevis
extends toes 2-4
extensor hallucis brevis
extends big toe