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Noninvasive measurement of dysphagia: simultaneous acceleration measurements during videofluorography

Accelerometry represents a noninvasive technique for the assessment of swallowing mechanism. However, the underlying physiological events that give rise to the acceleration signal are poorly understood. In the present study, the acceleration signal was measured simultaneously during videofluorography examination. Preliminary results revealed that the signal occurred during laryngeal elevation and the magnitude of acceleration correlated well with the laryngeal displacement. Acceleration measurements present a useful noninvasive tool for continued patient assessment.