Changes detected in swallowing function in Friedreich ataxia over 12 months.

Changes detected in swallowing function in Friedreich ataxia over 12 months.

Keage, Megan;Delatycki, Martin B;Dyer, Jessamy;Corben, Louise A;Vogel, Adam P;
neuromuscular disorders : nmd 2019
315
keage2019changesneuromuscular

Abstract

Friedreich ataxia (FRDA) is a multisystem neurodegenerative disorder and the most common hereditary ataxia. Dysphagia (swallowing impairment) is present in 98% of individuals with FRDA and is characterized by lingual and pharyngeal dysfunction (manifesting in impaired bolus preparation and transfer, and post-swallow residue in the mouth and pharynx), delayed swallow initiation, and entry of material into the airway (penetration/aspiration). Dysphagia severity correlates with disease severity and duration however no longitudinal studies describe changes in function in FRDA. The aim of this study was to investigate the progression of dysphagia in FRDA over one year. Fifty-nine individuals with FRDA and confirmed dysphagia were recruited and 23 of them underwent a second assessment 12 months later. Assessments of swallowing related quality of life, oral motor function (Frenchay Dysarthria Assessment 2nd Ed [FDA-2]) and functional swallowing via videofluoroscopy were conducted. Trials of thin liquid, puree and biscuit were interpreted using the Bethlehem Assessment Scale and the Penetration-Aspiration Scale by two blinded raters. Data from the videofluoroscopy revealed a decline in tongue function, pharyngeal clearance and cricopharyngeal function on solid food. However, severity of penetration/aspiration did not increase. Swallowing-related quality of life and oral-motor function remained stable. A decline in function was observed at three anatomical sites considered important for safe and effective swallowing (tongue, pharyngeal, and cricopharyngeal). However, these deficits did not translate into any meaningful functional decline in swallowing related health over 12 months for individuals with FRDA.

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