grapho-, graph-, -graph, -graphy, -grapher, -graphia
(Greek: to scratch; to write, to record, to draw, to describe; that which is written or described)
As indicated at the bottom of this page, there is a significantly large number of graphic word-entry groups in this unit. Such an extensive listing is provided to show how important the grapho- element is to the English language.
2. A record of the electrical activity of the uterine muscular contractions.
2. The process of recording and analyzing the electric action potentials that result from uterine muscular contractions.
2. An instrument used to measure ocean current velocities based on their electrical effects in the magnetic field of the earth.
3. A device for determining the motion of ocean water by measuring its electric potentials as it moves through the earth's magnetic field.
2. A device that provides a continuous recording of the movements of an internal body organ; such as, the heart, generally by recording the movements or the changes in density of the shadow of the organ as presented on a fluoroscope.
3. An appliance which combines a photoelectric recording system with a fluoroscope in order to make it possible for the continuous recording of the movements of a shadow within the fluoroscopic field or of changes in density in that shadow.
It is used especially with electrocardiography to study heart motions.2. The photography on x-ray film of the motions of the heart or of other moving structures which can be visualized radiographically.
3. The technique of recording the motions of a bodily organ with an electrokymograph.
2. An instrument for recording the activity of the vocal cords during respiration and phonation or the rapid, periodic opening and closing of the glottis through separation and apposition of the vocal cords that, accompanied by breath under lung pressure, constitutes a source of vocal sounds.
The electrolaryngograph consists of a pair of electrodes, one for application to either side of the neck adjacent to the larynx, a generator, an amplifier, and an oscilloscope.
2. An oscillograph in which the recording mechanism is controlled by a moving-coil galvanometer; such as, a direct-writing recorder or a light-beam oscillograph (device for making a record of the wave forms of fluctuating voltages or currents).
In New York City, he installed the world's first central electric power plant (1881-1882).
It consists of an amplifier, an electrically activated trace-drawing pen, and a moving strip of paper.2. An instrument which records differences in the electric potential of muscles that is used to diagnose muscular ailments.
Similar to the electrocardiograph, the electromyograph picks up clicks from sick muscles.
It is used to provide information about muscle activity during ambulation, for example, in patients with brain injury, stroke, or cerebral palsy.
It is done most often in patients with urinary or fecal incontinence.