The aim of the study is to evaluate whether the effect of biofeedback treatment is more effective than a control treatment in the recovery of dysphagia. This study will be a multicentric randomized, single-blind controlled study. The investigators intend to recruit 100 patients who have suffered a stroke and have dysphagia. Fifty patients will undergo training with bio-feedback (experimental group) and the other fifty patients will undergo standard training, using only verbal feedback rather than visual feedback (control group). Our hypothesis, based on the results obtained in some previous studies, is that in the control group the efficacy of the treatment will be lower in the absence of immediate visual feedback of strength, timing, coordination and efficacy of the swallowing act.
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Positive changes of efficacy of swallowing
Timeframe: The evaluation of swallowing functions will be done before treatment, then up to 4 weeks (after 20 treatment sessions) finally up to two months
Changes in penetration/aspiration of saliva or bolus
Timeframe: The evaluation of swallowing the entity of penetration/aspiration will be done before treatment, then up to 4 weeks (after 20 treatment sessions) finally up to two months]
Changes in pharyngeal residues
Timeframe: The evaluation of swallowing the entity of pharyngeal residue will be done before treatment, then up to 4 weeks (after 20 treatment sessions) finally up to two months