Machine
The 3 types of machines
What are Levers, Pulleys and Wheel-and-axle?
the concept that a body submerged in a fluid will be resisted by a force that is equal in magnitude to the weight of the displaced water
What is Archimedes Principle?
The type of path followed by a projectile in the absence of any force other than gravity.
What is a parabola?
This is where the motor neuron meets the muscle fibers.
What is the neuromuscular junction?
The phase that is present in running but not in walking gait.
The 4 functions of a machine.
What are transmitting a force, increasing magnitude of a force, increasing linear distance and velocity of a force and changing direction?
The force that can be upward or downward and runs perpendicular to the force.
What is lift?
This is a vector quantity that has both magnitude and direction.
What is velocity?
The sliding filament theory refers to the movement of these two structures.
What are the tick filaments (myosin) and the thin filaments (actin)?
Pain that is felt is one part of the body but its source is somewhere else.
What is referred pain?
The most versatile class of levers.
What is a first class lever?
The components of dynamic fluid forces.
What are lift and drag?
The 3 biomechanical factors that affect projectile trajectory.
What are projection angle, projection velocity and relative projection height?
The concept of greater load equals less speed refers to this relationship.
What is the Force-Velocity relationship?
A shoulder shrug is used to test this myotome.
What is the C4 myotome?
The most common lever used in human movement.
What is a third class lever?
Lift which is caused by rotation.
What is the Magnus Effect?
This angle of attack will create the optimal distance, at least on paper it does!
What is a 45 degree projection angle?
The 4 properties of skeletal muscles.
What are excitability, contractility, extensibility and excitability?
Circumduction-type gait may be found in a patient suffering from these conditions.
What are stroke and/or hemiplegia?
These allow for higher velocity at the distal ends of limbs/levers.
What are longer levers or longer distance between the axis and the resistive forces.
If an object is this, it has a specific gravity greater than the fluid it is in.
What is negatively buoyant or negative buoyancy/sink?
The difference between the height of the release and the height of impact.
What is relative projection height?
These two terms describe muscles that support primary movement and stabilize unwanted movements.
What are Synergists and Fixers/Fixators?
This is the muscle that is tested when assessing the L4 myotome.
What is the Tibialis Anterior?
inversion and dorsiflexion