Muscle Actions Flashcards
covers the entire muscle
epimysium
group of muscle cells surrounded by perimysium
fascicles
coverings of muscles
epimysium, perimysium, endomysium
covering of fascicles
perimysium
covering of a single muscle cell
endomysium
a single muscle cell
muscle fiber
type of dense irregular CT
tendon
sheet of CT
aponeurosis
the starting attachment point. bone the muscle is anchored on.
origin
ending attachment point. bone that is doing the movement.
insertion
muscle movement
action
two movements in the sagittal plane
flexion and extension
movement foward in sagittal plane (angle decrease)
flexion
movement backward in sagittal plane (increase angle)
extension
extreme extension is called
hyperextension
two movements based off of midline
abduction and adduction
movement away from midline
abduction
movement towards midline
adduction
all movement in the transverse plane
rotation
movement superior (flexed foot)
dorsiflexion
movement inferior (pointing foot)
plantar flexion
the muscle most responsible, its contraction generates movement.
agonist
muscle being worked against which helps control the agonist. its relaxation allows movement.
antagonist
a muscle contracting to aid agonist in movement
synergist
muscle that holds joint still, a synergist stabilizer
fixator
