Movement Analysis Flashcards
What is a lever system made up of
The Lever arm
The Fulcrum
The Effort
The load or resistance
The lever arm
The bone or body part being moved about a point
Diagram - straight line
The Fulcrum
The joint where the lever arm pivots
Diagram - triangle
The effort
The force applied by the muscles to the lever arm
Diagram - an arrow pointing in direction of force
The load or resistance
The pull of the muscles on the lever arm
Diagram - square
Acronym to remember lever systems
1 2 3
F R E
T G B
First Class lever example
Elbow extension
Football throw in
Second class lever example
Plantarflexion and dorsiflexion
Jumping of a diving block
Third class lever example
Elbow flexion
Flexion and extension at the shoulder, hip and knee
Lifting a weight
Mechanical advantage
Effort arm / reistance arm
Effort arm
Distance between fulcrum and effort
Load/resistance arm
Distance between the fulcrum and load
High mechanical advantage
Move a large load with small effort
Only over short distances at low speeds
2nd Class levers
Low mechanical advantage
Large effort to move a small load
can move quickly through a large range of movement
Third class levers
Which lever can have a high or low mechanical advantage
first class lever
What is a plane of movement
An imaginery flat surface which runs through the body
Three types of plane
Sagittal plane - Divides body into left and right
Transverse plane - divides the body into top and bottom
Frontal Plane - Divides the body into front and back
What is an axis of movement
An imaginary line which runs through the body
Allows rotation
three types of Axis
Sagittal - From front to back
Transverse - left to right
Longditudnal - top to bottom
Movement at a sagittal plane
Flexion and Extension
Movement at a transverse plane
Rotation
Movement at a frontal plane
abduction and adduction
Sagittal plane…
Transverse axis
Frontal plane…
Sagittal axis
