biomechanical frame of reference and levers Flashcards
What does a frame of reference guide in practice?
Beliefs, assumptions, definitions, and concepts within a specific area of practice
How is the biomechanical frame of reference divided?
Focus, assumption, and outcome
What is the focus of the biomechanical frame of reference?
Restoring or establishing:
* Structural stability
* Tissue integrity
* Range of motion
* Strength endurance
What is the assumption of the biomechanical frame of reference?
Improved structural stability, tissue integrity, ROM, endurance will result in improved functional abilities
What is the outcome of the biomechanical frame of reference?
Reduced limitation improves quality of life
What are the strengths of the biomechanical frame of reference?
Facilitates evaluation of movement in activity and helps in developing adaptive equipment to restore function related to specific body part
What are the limitations of the biomechanical frame of reference?
Need to consider specifics of client, not only health of specific body part, should look at the person as a whole, consider more holistic lens: psychology, social life, well-being
What are the elements of Kinematic activity analysis?
Sequence of movement, joint motion, muscle activity
What is a lever?
A rigid body rotating around an axis, made of a moving force (effort), axis (fulcrum), and resistance force (load)
What is the force arm (effort)?
The perpendicular distance from the axis to the line of action of the force
What is the resistance arm?
The perpendicular distance from the axis to the line of action of the resistance
What is mechanical advantage?
Mechanical advantage = Force arm/resistance arm
What happens when the force arm increases?
Effort becomes easier, more mechanical advantage
What happens when the resistance arm increases?
Effort becomes harder, less mechanical advantage
What is a first class lever?
Axis is between two forces, F – A – R
What is a second class lever?
Axis at one end, R closest to axis, RA<FA, A – R – F
What is a third class lever?
Axis at one end, F closest to axis, RA > FA, A – F – R
