Effects of liquid stimuli on dual-axis swallowing accelerometry signals in a healthy population.

Biomedical Engineering Online
Joon LeeTom Chau

Abstract

Dual-axis swallowing accelerometry has recently been proposed as a tool for non-invasive analysis of swallowing function. Although swallowing is known to be physiologically modifiable by the type of food or liquid (i.e., stimuli), the effects of stimuli on dual-axis accelerometry signals have never been thoroughly investigated. Thus, the objective of this study was to investigate stimulus effects on dual-axis accelerometry signal characteristics. Signals were acquired from 17 healthy participants while swallowing 4 different stimuli: water, nectar-thick and honey-thick apple juices, and a thin-liquid barium suspension. Two swallowing tasks were examined: discrete and sequential. A variety of features were extracted in the time and time-frequency domains after swallow segmentation and pre-processing. A separate Friedman test was conducted for each feature and for each swallowing task. Significant main stimulus effects were found on 6 out of 30 features for the discrete task and on 5 out of 30 features for the sequential task. Analysis of the features with significant stimulus effects suggested that the changes in the signals revealed slower and more pronounced swallowing patterns with increasing bolus viscosity. We conclude that...Continue Reading

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Citations

Nov 17, 2011·Biomedical Engineering Online·Mohammad S NikjooTom Chau
Sep 12, 2013·Biomedical Engineering Online·Iva JestrovićErvin Sejdić
Jun 12, 2010·Biomedical Engineering Online·Natasha AlvesTom Chau
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Aug 17, 2019·Royal Society Open Science·Shitong MaoErvin Sejdic
Feb 24, 2016·Current Opinion in Otolaryngology & Head and Neck Surgery·Ben Hanson

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Methods Mentioned

BETA
X-ray
feature extraction

Software Mentioned

VFSS
LabVIEW

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