Dysphagia

, Volume 33, Issue 3, pp 380–388 | Cite as

Alterations to Swallowing Physiology as the Result of Effortful Swallowing in Healthy Seniors

  • Sonja M. Molfenter
  • Chuan-Ya Hsu
  • Ying Lu
  • Cathy L. Lazarus
Original Article

Abstract

A significant proportion of healthy seniors report difficulty swallowing, thought to result from age-related decline in muscle bulk/function. Effortful Swallowing (ES) is used both as a compensatory maneuver to improve pharyngeal propulsion/clearance and has been proposed as an exercise to improve pharyngeal strength. This study sought to quantify the immediate kinematic, temporal, and functional changes during an ES maneuver to quantify its exercise potential to combat age-related changes in swallowing. Videofluoroscopy data were collected from 44 healthy seniors (21 male) over 65 years old (mean = 76.9, SD = 7.1). Each participant swallowed six 5 ml boluses of Varibar nectar-thick liquids: three with regular effort and three using ES. Individual swallows (n = 260) were measured on pharyngeal constriction, pharyngeal shortening, laryngeal closure duration, hyoid movement duration, UES opening duration, stage transition duration, pharyngeal transit time, pharyngeal response duration, Normalized Residue Ratio Scale (NRRS), and the Penetration–Aspiration Scale (PAS). Non-parametric Wilcoxon Rank Sum for repeated measures tested the effect of ES on each outcome. Exact p-values were calculated based on permutation methods, individual p values < 0.008 was deemed to be significant. The ES maneuver significantly prolonged all temporal variables. While we found no significant differences for pharyngeal constriction, significantly less (i.e., worse) pharyngeal shortening was observed in ES condition compared with regular effort swallows. Further, significantly worse pyriform sinus residue (NRRSv) was observed in the ES condition. No differences between ES and regular effort swallows were noted for pharyngeal constriction, NRRSv or PAS. We speculate that these negative manifestations of worse kinematics (less pharyngeal shortening) and function (increase in NRRSp) may be the result of forced volitional manipulation of swallowing in the ES condition in an otherwise normal elderly swallow.

Keywords

Deglutition Dysphagia Aging Effortful swallow Kinematics Temporal NRRS Pharynx 

Notes

Acknowledgements

The authors would like to thank Charles Lenell, Erica Herzberg, Danielle Brates, Mehak Noorani, Emily Ottinger, Shelby Norman, Il Young Jung, Julie Bancroft, Wendy Liang, Chelsea Sandler, Marina Casale, and Katrin Gabriel for their assistance during data collection and data analysis.

Funding

This study was funded by NIH National Institute on Deafness and Other Communication Disorders 1R21DC015067.

Compliance with Ethical Standards

Conflict of interest

This work was presented as an oral presentation at the 2017 European Society for Swallowing Disorders (ESSD).

Ethical Approval

All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.

Informed Consent

Informed consent was obtained from all individual participants included in the study.

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2017

Authors and Affiliations

  1. 1.Department of Communicative Sciences & DisordersNYU SteinhardtNew YorkUSA
  2. 2.Department of Applied Statistics Social Science & HumanitiesNYU SteinhardtNew YorkUSA
  3. 3.Department of Otolaryngology Head & Neck SurgeryMount Sinai Beth IsraelNew YorkUSA

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