Muscles Flashcards
over frontal bone
frontalis
elevates eyebrows, wrinkles forehead
encircles the eye
orbicularis oculi
closes eye for blinking
encircles mouth
orbicularis oris
closes mouth, shapes lips for kissing
cheek area
buccinator
sucking, swallowing, keeps food in contact with teeth while chewing
from cheekbone to corners of mouth
zygomaticus
elevates corners of mouth for smiling
from cheekbone to mandible
masseter
elevates mandible for chewing
overlies temporal bone
temporalis
elevates mandible for chewing
above shoulder
trapezius
extends neck, elevates/depresses/adducts scapula
front of neck
sternocleidomastoid
flexes neck
separates thoracic and abdominal cavities
diaphragm (only action)
respiration
between ribs, lateral
external intercostal
elevates ribcage during inspiration
between ribs, medial
internal intercoastal
depresses ribcage during forced expiration
abdominal, lateral
external oblique
lateral flexion and rotation of trunk
abdominal, medial
rectus abdominis
flexion and rotation of trunk
axillary, lateral
serratus anterior
protracts scapula for pushing
shoulder, femor
deltoid
abducts arm
chest
pectoralis major
flexes and adducts arm
back, lateral
latissimus dorsi
extends and adducts arm
front arm
biceps brachii
flexes forearm
back arm
triceps brachii
extends forearm
back of forearm (only action)
extensor carpi group
extends hand and wrist
front of forearm
flexor carpi group (only action)
extends hand and wrist
back of medial forearm
extensor digitorum (only action) extends fingers
front of medial forearm
flexor digitorum (only action) flexes fingers
front of thigh
from medial to lateral
quadriceps femoris = all extend leg vastus medialis rectus femoris = also flexes thigh vastus lateralis vastus intermedius = deep (only action)
crosses medial thigh
sartorius
flexes leg and thigh
deep thigh
medial to lateral
adductor group = adducts thigh
gracilis
adductor longus (only action)
pectineus (only action)
behind
gluteus maximus
extends thigh
back of thigh
from medial to lateral
hamstring group = extends thigh, flexes leg
semimembranosus
semitendinosus
biceps femoris
back of leg
gastrocnemius
plantar flexes foot
front of leg
tibialis anterior
dorsiflexes foot