Trends in Research Literature Describing Dysphagia in Motor Neuron Diseases (MND): A Scoping Review.
Ashley A Waito, Teresa J Valenzano, Melanie Peladeau-Pigeon and 1 others
PMID 28664472WHAT IT FOUND
Most research on swallowing in motor neuron disease focuses on aspiration, ignoring post-swallow residue which causes malnutrition.
Few studies test treatments directly; most recommendations rely on secondary sources or clinical observation. Instrumental assessment is needed to guide management effectively.
Key findings
01Research disproportionately focuses on aspiration (73.2% of articles) compared to post-swallow residue (29.9%), despite residue being linked to malnutrition.
02Nearly half of management recommendations are based on secondary reviews or clinical observation, with only five articles using instrumental assessment to evaluate a treatment.
03Silent aspiration and sensory changes were reported in a subset of studies, challenging the reliability of clinical observation alone for detecting swallowing safety issues.
STILL TO COME
How it was doneWhat they foundWhat it means for SLPs
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What it does not show
Only English-language articles were included. The quality of the included studies was not appraised. The review focused narrowly on swallowing physiology, excluding broader aspects of care like respiratory management and assisted coughing. Data on non-ALS subtypes (PBP, PLS, PMA) was very sparse, limiting conclusions about these specific groups. The heterogeneity of MND progression and presentation makes it difficult to apply general findings to individual patients.
Declared interests
The text does not report any conflicts of interest or funding sources.
The easy way to misread this
Do not interpret the high frequency of certain themes, like aspiration, as evidence that those interventions are proven effective. The review found that most recommendations lack direct instrumental evidence, so clinical judgment and individualized assessment remain essential.