title: Characteristics of Dry Chin-Tuck Swallowing Vibrations and Sounds.
abstract: OBJECTIVE
  The effects of the chin-tuck maneuver, a technique commonly employed to compensate for dysphagia, on cervical auscultation are not fully understood. Characterizing a technique that is known to affect swallowing function is an important step on the way to developing a new instrumentation-based swallowing screening tool.
  
  
  METHODS
  In this study, we recorded data from 55 adult participants who each completed five saliva swallows in a chin-tuck position. The resulting data were processed using previously designed filtering and segmentation algorithms. We then calculated nine time-, frequency-, and time-frequency-domain features for each independent signal.
  
  
  RESULTS
  We found that multiple frequency- and time-domain features varied significantly between male and female subjects as well as between swallowing sounds and vibrations. However, our analysis showed that participant age did not play a significant role on the values of the extracted features. Finally, we found that various frequency features corresponding to swallowing vibrations did demonstrate statistically significant variation between the neutral and chin-tuck positions but sounds showed no changes between these two positions.
  
  
  CONCLUSIONS
  The chin-tuck maneuver affects many facets of swallowing vibrations and sounds and its effects can be monitored via cervical auscultation.
  
  
  CONCLUSIONS
  These results suggest that a subject's swallowing technique does need to be accounted for when monitoring their performance with cervical auscultation-based instrumentation.
authors.forename: Joshua M
authors.initials: JM
authors.lastname: Dudik
authors.forename: Iva
authors.initials: I
authors.lastname: Jestrović
authors.forename: Bo
authors.initials: B
authors.lastname: Luan
authors.forename: James L
authors.initials: JL
authors.lastname: Coyle
authors.forename: Ervin
authors.initials: E
authors.lastname: Sejdić
mesh_terms: D061725:Accelerometry; D000328:Adult; D003679:Deglutition / Q000502:physiology*; D003680:Deglutition Disorders / Q000503:physiopathology*; D005260:Female; D006801:Humans; D008297:Male; D008991:Monitoring, Physiologic / Q000379:methods*; D012815:Signal Processing, Computer-Assisted; D014159:Transducers