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Levers and Planes and Axis (Levers (Types (2nd Class (Mechanical Advantage…
Levers and Planes and Axis
Planes and Axis
Sagittal Plane - Transverse axis
Fkexion --Extension Plantar flexion --dorsiflexion
Frontal plane - sagittal axis
Abduction / Adduction
Transverse plane - longitudinal axis
Horizontal Abduction Horizontal Adduction Rotation
Levers
Types
1st Class
effort------FULCRM-----load
Elbow when throwing
2nd Class
fulcrum -----LOAD-----effort
Plantarflexion
Mechanical Advantage
Load arm < effort arm
able to lift heavy weight
short range of motion
3rd Class
fulcrum ---- EFFORT-----load
most other joints in the body
mechanical disadvantage
Load arm > effort arm
good for adding speed
wide range of movement
cannot lift heavy weight
123 FLE
Fulcrum - Joint
Load- resistance/ body weight
Effort - muscle insertion - where the muscle attaches