A kymograph is a device that draws a graphical representation of spatial position over time in which a spatial axis represents time. It basically consists of a revolving drum wrapped with a sheet of paper on which a stylus moves back and forth recording perceived changes of phenomena such as motion or pressure.

What is kymograph in polygraph?

The kymograph was used as early as the 19th century for the simultaneous record- ing of data coming from the pneumograph and sphygmograph. The device thus constructed was known as a “polygraph”, i.e. a device for recording more than one function (Greek: poloi – multiple, graphos – to write).

What is kymograph used for?

Kymograph is generally used to study the effects of xenobiotics on tissue preparations. It is a standalone recording apparatus used alongside other apparatus such as organ bath. Writing levers are used to trace the recording from muscle contractions.