movement analysis Flashcards
what do lever systems do?
- help you move and they increase the amount u lift or the speed at which you can move something
what is the fulcrum, load and effort in the body?
Fulcrum - a joint
Load - weight/object
Effort - muscles
(lever - bone)
what happens in a first class lever?
L - F - E
What happens in a second class lever?
F - L - E
What happens in a third class lever?
F - E - L
Mechanical adv and dis of 2nd class lever?
ADV - provides force to lift heavy loads
DIS - small range of movements and cannot move load quickly
Mechanical adv and dis of 3rd class lever?
ADV - provides speed and wide range or movements
DIS - greater force required than load to be moved
What is a mechanical adv?
when load arm is longer than the resistant arm, less force is needed to move the resistant.
What is mechanical dis?
when effort arm is shorter than resistant arm, more force is needed to overcome the inertia of the resistance.
what are planes of movement?
an imaginary line that movement direction occurs
Types of planes?
Sagittal (divides right and left side of the body)
frontal (divides front and back of the body)
transverse (divides top and bottom of the body)
what are axes of movement?
an imaginary line which the body part can turn
Type of axis?
sagittal axis (goes from front to back)
frontal axis (goes from side to side)
vertical axis (goes from top to bottom)
planes and their axes pair?
Sagittal plane - frontal axis
Frontal plane - Sagittal axis
Transverse plane - vertical axis
movements that happen at a saggital plane & frontal axis?
flextion and extention (somersault)
movements that happen at a frontal plane & saggital axis?
abduction and adduction (cartwheel)
movements that happen at transverse plane & vertical axis?
rotation and twisting (full twist)
