The following are articles and research on neuromuscular electrical stimulation for dysphagia

(aka NMES or VitalStim therapy):

Neuromuscular-Electrical-Stimulation-NMES-in-the-Treatment-of-Dysphagia – A Summary of Evidence
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Dysphagia Cafe – VitalStim: Analysis of NMES and dysphagia literature

Journal of Physical Therapy Science – Effect of electrical stimulation on aspiration in children with cerebral palsy and dysphagia

ASHA Leader – Swallowing Treatment in Acute Care Looks Different With COVID-19

Dysphagia Cafe – Swallowing and patients on mechanical ventilation: Something to chew on

PulmCCM – Dysphagia and swallowing disorders in the ICU (Review)

BMC: Critical Care – Postextubation dysphagia is persistent and associated with poor outcomes in survivors of critical illness

ATS Journals – Recovery from Dysphagia Symptoms after Oral Endotracheal Intubation in Acute Respiratory Distress Syndrome Survivors – A 5-Year Longitudinal Study

American Academy of Otolaryngology–Head and Neck Surgery Foundation – Transcutaneous electrical stimulation versus traditional dysphagia therapy