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Kymograph |
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kymograph [′kī·mə‚graf]
(industrial engineering) A device used to measure extremely short work time intervals by using a system of transducers that are activated by an operator performing a job, with the impulses recorded as a function of time. (medicine) A device for recording internal body movements by making tracings with a stylus on a revolving smoked drum. Kymograph an instrument that graphs certain physiological processes, such as heartbeat, respiration, and muscle contractions. A mechanical kymograph was used for the first time by the German physiologist K. Ludwig in 1847 to record changes in blood pressure. The apparatus consisted of a metal drum, covered with smoked paper and evenly rotated by a clock mechanism. A stylus attached to a rod and connected to the contracting heart, muscle, or other functioning organ describes a curve on the drum. The speed of rotation of the kymograph is regulated by the movement of a friction clutch along the axis and depends on the dimensions of an air brake. Electrokymographs are used for investigations demanding greater accuracy. These kymographs ensure a constant but easily regulated speed of movement. The driving drum of the electrokymograph is set in motion by an electric motor. I. N. D’IAKONOVA Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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No references found | NIS-Elements C allows diverse image acquisition and analysis methods with techniques such as Colocalization, 2D Object Tracking and Kymograph displays. In all experiments responses were recorded on a kymograph (ET8 G-Boulitt, Paris), and were measured after fixation. The bell deflection can be measured directly through a pin attached to the outer edge of the bell which marks a kymograph with paper attached or a carbon rod potentiometer can be attached to the bell which slides through magnetic chamber causing electrical currents to be produced and recorded in proportion to the amount and speed of the bell's deflection. |
Kymograph |
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