Flashcards in Chapter 4 Deck (35)
what is a uniaxial joint
joint that act as hinges rotating only 1 axis (elbow)
what is biaxial?
joints that move 2 perpendicular axes such as ankle wrist
allow movement about all 3 perpendiculat axes such shoulder and hip (ball-and-socket)
during a straight-leg sit-up the origin (proximal[toward the center of the body]) of the iliacus muscle would be the?
femur because it is immobile
during a straight-leg sit-up the insertion( distal:away from the center of the body) of the iliacus muscle would be the ?
pelvis because it is mobile
what assist is joint stabilization and in braking the limb toward the end of a fast movement?
assists indirectly in a movement
what is a lever?
a rigid or simiriged body that when sujected to a force whose line of action does not pass throught its pivot point exerts force on any object impeding its tendency to rotate
the picot point of a lever
the perpendicular distance from the line of action of the force to the fulcrum.
also called mement, the degree a force tends to ratate an object about a specified fulcrum: magnitude of a force times the length of its moment arm
force generated by biochemical activity or sthe stretching of noncontractile tissue
force generated by a source extended to the body (gravity, inertia, friction) it acts contrary to muscle force
the ratio of the moment arm through which an apllied force acts to that through which a resistive force acts
first class lever
a lever for which the muscle force and resistive force act on opposite sides of the fulcrum
2nd class lever
a lever for which the muscle force and resistive force act on the same side of the fulcrum
movement and plane during a wrist curl
wrists flexion sagittal
movement and plane during bicep curl
movement and plane during tricep pushdown
movement and plane during front shoulder raise
movement and plane during neutral grip seated row
movement and plane during wide grip lat pulldown
movement and plane during wide grip shoulder press
movement and plane during arm wrestle winning
internal rotation transverse
movement and plane during arm wrestle losing
external rotation transverse
movement and plane during dumbbell chest fly
movement and plane during bent over lateral raise
movement and plane during chin to chest; look up
chin to chest neck flexion sagittal
look up neck extension sagittal