Complex laryngeal manoeuvres occur during swallowing and singing register changes. These actions require an accurate synchronization of vocal fold adduction/abduction and the change of the larynx position. In case of dysfunction, this synchronization can be disturbed. The simultaneous assessment of glottal dynamics (typical EGG signal) and larynx position can be beneficial for the diagnosis of disordered voice and swallowing. Up to now, there isn’t the possibility to derive instantly these two information because of technology problems. We used a time-multiplex measurement approach of space-resolved transfer impedances through the larynx (MC-EGG). We developed a software Labview code for the visualization of the main waveforms in the study of the EGG signals. Moreover the data acquired by Labview have been used to create a theoretical algorithm for deriving the position of the larynx inside the neck. We verified the results of the algorithm for the 3D larynx movement comparing the data acquired with the values described in literature. The paths of the larynx and the displacement on the vertical and sagittal plans match the known ones for the emission of low/high notes and for the swallowing. Besides we have introduced the possibility to study the movement on the coronal plan (unexplored up to now) that can be a starting point for new analysis.
Derivation of Spatial Information from a Multi-Channel Electroglottograph
TRONCHIN, LAMBERTO;
2011
Abstract
Complex laryngeal manoeuvres occur during swallowing and singing register changes. These actions require an accurate synchronization of vocal fold adduction/abduction and the change of the larynx position. In case of dysfunction, this synchronization can be disturbed. The simultaneous assessment of glottal dynamics (typical EGG signal) and larynx position can be beneficial for the diagnosis of disordered voice and swallowing. Up to now, there isn’t the possibility to derive instantly these two information because of technology problems. We used a time-multiplex measurement approach of space-resolved transfer impedances through the larynx (MC-EGG). We developed a software Labview code for the visualization of the main waveforms in the study of the EGG signals. Moreover the data acquired by Labview have been used to create a theoretical algorithm for deriving the position of the larynx inside the neck. We verified the results of the algorithm for the 3D larynx movement comparing the data acquired with the values described in literature. The paths of the larynx and the displacement on the vertical and sagittal plans match the known ones for the emission of low/high notes and for the swallowing. Besides we have introduced the possibility to study the movement on the coronal plan (unexplored up to now) that can be a starting point for new analysis.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
