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31 terms

Muscle Concept Questions

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trapezius
muscle that allows you to shrug your shoulders or extend your head
latissimus dorsi
muscle that adducts the shoulder and causes extension of the shoulder joint
deltoid
shoulder muscle that is the antagonist of the latissimus dorsi
erector spinae
prime mover of back extension; a deep composite muscle consisting of three columns
latissimus dorsi
large paired superficial muscle of the lower back
quadratus lumborum
fleshy muscle forming part of the posterior abdominal wall that helps maintain upright posture
iliopsoas
hip flexor, deep in pelvis; a composite of two muscles
gluteus maximus
used to extend the hip when climbing stairs
gastrocnemius
"toe dancer's" muscle; a two-bellied muscle of the calf
tibialis anterior
inverts and dorsiflexes the foot
adductors
muscle group that allows you to draw your leg to the midline of the body, as when standing at attention
quadriceps
muscle group that extends the knee
hamstrings
muscle group that extends the thigh and flexes the knee
gluteus medius
smaller hip muscle commonly used as an injection site
fibularis muscles
muscle group of the lateral leg; plantar flexes and everts the foot
sartorius
straplike muscle that is a weak thigh flexor; the "tailor's muscle"
soleus
like the two-bellied muscle that lies over it, this muscle is a plantar flexor
flexor carpi ulnaris
wrist flexor that follows the ulna
extensor digitorum
muscle that extends the fingers
flexor digitorum superficialis
muscle that flexes the fingers
biceps brachii
muscle that allows you to bend (flex) the elbow
deltoid
powerful shoulder abductor, used to raise the arm overhead
triceps brachii
muscle that extends the elbow
zygomaticus
used in smiling
buccinator
used to suck in your cheeks
orbicularis oculi
used in winking
frontalis
used to form the horizontal frown crease on the forehead
orbicularis oris
the "kissing" muscle
masseter
prime mover of jaw closure
temporalis
synergist muscle for jaw closure
sternocleidomastoid
prime mover of head flexion; a two-headed muscle