Lecture 1 Flashcards
Pathology
The medical science, and specialty practice, concerned with all aspects of disease, but with special reference to the essential nature, causes, and development of abnormal conditions, as well as the structural and functional changes that result from the disease processes.
Kinesiology
The science or study of movement, and the active and passive structures involved.
Kinematics
Describes motion w/o stating the cause (position, velocity, acceleration)
Kinetics
States the cause of motion (Force and Torque)
When the sum of F is in the same direction as movement then acceleration is…
Speeding up
When the sum of F is in the opposite direction of the movement then acceleration is…
Slowing down
4 Properties of an External Force Vector
1) point of application of the force
2) direction of the force relative to the horizontal (theta)
3) line of the force of action
4) length = magnitude of the force
Stabilizing Component
Portion of the force that goes toward the joint
Dislocating/distracting component
Portion of the force that goes away from the joint
Biceps has greatest strength at less than…
90 degrees
Is the force exerted by the biceps at greater than 90 degrees a dislocating or stabilizing force?
Dislocating
Describe a 1st class lever system
The axis of movement (fulcrum) is between the Resistance and the Force.
Describe a 2nd class lever system.
The Resistance is between the axis of movement (fulcrum) and the Force.
Describe a 3rd class lever system
The Force is between the axis of movement (fulcrum) and the Resistance.
What is the most common lever system in the human body?
3rd class
