web analytics

Holcomb Hathaway, Publishers

Chapter 9 Definitions

Accelerometer: A transducer that measures acceleration. It usually consists of an inertia mass that exerts a force against an element, whose resulting strain is then measured.
Biomechanics: The study of the human body in motion.
Cinematography: A technique that provides a sequence of images that can be displayed as a motion picture or viewed one by one.
Computerized dynamic posturography: A process used to measure the control of posture and balance in upright stance.
Dynamics: A branch of mechanics that investigates bodies, masses, and forces in motion.
Dynamography: A technique that provides kinetic data. A dynamograph is a device used for measuring forces produced during an activity.
Electromyography: A technique that provides data on muscle activity by recording the electrical changes that occur in a muscle during or immediately before contraction.
Force platform: An electromechanical device that provides electrical signals proportional to the components of force acting on it.
Goniometer: A device that provides kinematic data on joint positioning; is used to measure static positions of limb segments with respect to a joint axis.
Instrumented staircase: Assessment equipment typically equipped with multiple force platforms; designed to accurately measure the amount of force applied on each step during stair ascent and descent and can detect the usage of handrails during stair negotiation.
Instrumented treadmill: A treadmill with force platforms embedded below the belt to allow biomechanists to measure the amount of force applied while walking or running on the treadmill. Its split-belt design can provide a different speed for each belt or even two different directions, creating a more challenging environment for studying human locomotion.
Kinematics: A branch of mechanics that investigates motion without reference to masses or forces.
Kinetics: A branch of mechanics that investigates the actions of forces in producing or changing the motion of masses.
Magnetic resonance imaging (MRI): A noninvasive medical diagnostic technique that uses a magnetic field to produce anatomical pictures of the living body.
Modeling: A technique used to provide a prediction of kinematic and kinetic data.
Motion recording devices: Captures body motion using optical lenses to provide permanent recorded images of movement.
Pressure insole: A device that consists of a matrix of small force transducers. It provides detailed information concerning load distribution.
Simulation: A technique used to provide a prediction of kinematic and kinetic data.
Statics: A branch of mechanics that investigates bodies, masses, and forces at rest or in equilibrium.
Temporal analysis: A technique that uses time as the basis for examining motion.
Videography: A technique that provides a sequence of images that can be displayed as a motion picture or viewed individually. The images are recorded on videotape and are most commonly taken at a rate of 30 frames per second. High-speed video can be taken at 60 or more frames per second.