Anatomy Lab Exercise 14 Flashcards
origin
nonmoving attachment point
insertion
moving attachment point
belly
enlarged area of the muscle between the origin and insertion
extensors
muscles on the posterior surface of the arm
flexors
muscles on the anterior surface of the arm
adductors
muscles on the medial surface of the thigh
abductors
muscles on the lateral surface of the thigh
agonist
larger muscle in a group; prime mover
synergist
smaller muscle in a group that assists the agonist
antagonist
muscle opposing the movement caused by the agonist
fixators
muscles that stabilize the point of origin
rectus
muscle fibers parallel to body midline
transverse
muscle fibers perpendicular to body midline
oblique
muscle fibers diagonal to body midline
maximus
largest muscle in a group
medius
middle sized muscle in a group
minimus
smallest muscle in a group
magnus
large muscle
brevis
short muscle
longus
long muscle
latissimus
widest muscle
longissimus
longest muscle
major
larger muscle
minor
smaller muscle
vastus
great
deltoid
triangular
trapezius
trapezoid
serratus
saw-toothed
rhombdoid
diamond-shaped
orbicularis
circular
piriformis
pear-shaped
platys
flat
gracilis
slender
flexor
decreases a joint angle
extensor
increases a joint angle
abductor
moves a bone away from the midline
adductor
moves a bone toward the midline
levator
raises or elevates a body part
depressor
lowers or depresses a body part
supinator
turns palm superiorly or anteriorly
pronator
turns palm inferiorly or posteriorly
tensor
makes a body part rigid
biceps
two origins
triceps
three origins
quadriceps
origins