Abstract
Surface electromyography (sEMG) can be helpful for evaluating swallowing related muscle activity. Conventional recordings with disc electrodes suffer from significant crosstalk from adjacent muscles and electrode-to-muscle fiber orientation problems, while concentric ring electrodes (CREs) offer enhanced spatial selectivity and axial isotropy. The aim of this work was to evaluate CRE performance in sEMG recordings of the swallowing muscles. Bipolar recordings were taken from 21 healthy young volunteers when swallowing saliva, water and yogurt, first with a conventional disc and then with a CRE. The signals were characterized by the root-mean-square amplitude, signal-to-noise ratio, myopulse, zero-crossings, median frequency, bandwidth and bilateral muscle cross-correlations. The results showed that CREs have advantages in the sEMG analysis of swallowing muscles, including enhanced spatial selectivity and the associated reduction in crosstalk, the ability to pick up a wider range of EMG frequency components and easier electrode placement thanks to its radial symmetry. However, technical changes are recommended in the future to ensure that the lower CRE signal amplitude does not significantly affect its quality. CREs show great potential for improving the clinical monitoring and evaluation of swallowing muscle activity. Future work on pathological subjects will assess the possible advantages of CREs in dysphagia monitoring and diagnosis.
Highlights
Patients with dysphagia patients find it difficult or impossible to swallow food or liquids.Dysphagia affects millions of people every yearand is a substantial burden on healthcare systems
The present study aims to evaluate the use of concentric ring electrodes (CREs) in Surface electromyography (sEMG) recording of swallowing by comparing the performance of CREs with that of conventional disc electrodes
The conventional disc disc electrodes electrodes (CDEs) sEMG Root mean square (RMS) was significantly higher than that obtained from the concentric configuration, regardless of bolus and muscle type
Summary
Patients with dysphagia patients find it difficult or impossible to swallow food or liquids.Dysphagia affects millions of people every year (about 3 million in the United States alone [1])and is a substantial burden on healthcare systems. Patients with dysphagia patients find it difficult or impossible to swallow food or liquids. Among the current methods for its diagnosis and monitoring, surface electromyography (sEMG) stands out because it is non-invasive, relatively inexpensive, it provides a considerable amount of information on the swallowing process and can potentially be used in human-computer interfaces. SEMG recordings from conventional disc electrodes still have limitations, these can be overcome by concentric ring electrodes (CREs). The present study aims to evaluate the use of CREs in sEMG recording of swallowing by comparing the performance of CREs with that of conventional disc electrodes. Swallowing disorders (dysphagia) are highly prevalent in patients with neuromuscular or neurogenic diseases, for instance, between 27 and 50% of stroke patients and 75 to 97% of those with
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