myograph (mi'o-graf)

An apparatus for recording graphically the curve of a muscular contraction. cardiac m. See cardiograph, comparative m., double m. A m. to be used with two different muscles simultaneously, fall m. A m. devised by Harle in which the contraction is registered upon a falling plate. palate m. A m. for recording the movements of the uvula during deglutition, phonation, etc. pendulum m. A heavy pendulum carrying a smoked plate upon which muscular contractions may be registered in curves, spring m. An instrument in which the recording surface is given a rapid movement by means of a spring. It is used to obtain curves of muscular contraction, thickne m. A m. that records graphically the variations of the thickne of a muscle as it contracts or relaxes. [Gr., mys, muscle, + graphein, to write.]