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Electropalatography (EPG)

Electropalatography (EPG; also termed palatometry, dynamic palatometry) is a computerized instrumental technique that detects, visually displays, and records when and where on the hard palate the tongue touches during events such as speech production. The technique itself does not provide information on the shape and movement of the tongue, but lingual gestures might be inferred based on the tongue–palate contact patterns captured by EPG. This entry discusses EPG systems, the use of EPG in research and clinical intervention, data analysis, and issues to consider when using EPG.

How EPG Works

To detect tongue–palate contact patterns, the person under EPG investigation has to wear a custom-made EPG plate with sensors embedded on the lingual surface of the plate. Each sensor is connected to a thin wire, and the ...

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