grapho-, graph-, -graph, -graphy, -grapher, -graphia +

1. An electrical device for engraving a design on a metal plate which is used for printing patterns on fabrics or wallpaper.
2. An apparatus used to transmit pictures by electrical means; for example, by fax.

A reference to an electrical device for engraving a design on a metal plate which is used for printing patterns on fabrics or wallpaper.

The process of copying an engraving on an electro-copper plate.

The recording of changes in electric potential associated with contractions of the uterine muscle.

A machine used for producing a graphical tracing of the electrical activity picked up via electrodes inserted into muscle tissue.

It consists of an amplifier, an electrically activated trace-drawing pen, and a moving strip of paper.

1. The recording of electrical activity generated in muscle for diagnostic purposes; both surface and needle recording electrodes can be used, although characteristically the latter is employed, so that the procedure is also called needle electrode examination.
2. An umbrella term for the entire electrodiagnostic study performed in the EMG laboratory, including not only the needle electrode examination, but also the nerve conduction studies.

Diagnosis of disease states by recording the spontaneous electrical activity of tissues or organs or by the response to stimulation of electrically excitable tissue.

1. An electromyography in which the nerve of the muscle under study is stimulated by application of an electric current.
2. A method of measuring changes in a peripheral nerve by combining electromyography of a muscle with electrical stimulation of the nerve trunk carrying fibers to and from the muscle.

1. Oculography in which electrodes placed on the skin adjacent to the eyes measure changes in standing potential between the front and back of the eyeball as the eyes move.
2. A sensitive electrical test for detection of retinal pigment epithelium dysfunction.
3. The study and interpretation of electroencephalograms made by moving the eyes a constant distance between two fixed points.

Abbreviated ERG; a test in which the electrical potentials generated by the retina of the eye are measured when the retina is stimulated by light.

The instrument used to do electroretinography is known as an electroretinograph and the resultant recording is called an electroretinogram.

In an ERG, an electrode is placed on the cornea at the front of the eye. The electrode measures the electrical response of the rods and cones, the visual cells in the retina at the back of the eye. An ERG may be useful in the evaluation of hereditary and acquired disorders of the retina.

A normal ERG shows the appropriate responses with increased light intensity. An abnormal ERG is found in conditions; such as, arteriosclerosis of the retina, detachment of the retina, and temporal arteritis with eye involvement.

An electrical instrument that amplifies or records the respiratory and cardiac sounds of the chest.

Electromyography (recording and study of the intrinsic electrical properties of the skeletal muscle) in which the action potentials produced by peristalsis (rippling motions of muscles) of the ureter are recorded.

Radiographic examination of the brain in which some of the cerebrospinal fluid is replaced with air or another gas that acts as a contrasting medium.

Electrocardiography with the exploring electrode within the chambers of the heart.

A written description of the intestinal glands.