Abstract
ObjectiveFunctional training is necessary for swallowing rehabilitation; however, there is a risk of aspiration. Indirect swallowing training involving mirror neuron activity may be useful for swallowing recovery, as there is no risk of aspiration. MethodsThis study investigated the activity of mirror neurons in the cerebral cortex (Brodmann areas 6, 40, and 44) while healthy elderly adults (eight men and seven women; average age, 66.4 years) watched swallowing-related videos. Functional magnetic resonance imaging was used to examine the presence or absence of mirror neuron activity during the presentation of four types of swallowing-related videos. ResultsThe strongest brain activity was observed during the chewing/swallowing fluoroscopic video, and female participants showed increased activity compared with male participants. Some activity was observed for all four video types; however, the highest intensity occurred during the masticatory swallowing fluoroscopy video. ConclusionsSince there was mirror neuron activity while participants watched the videos, it is possible that it mimics swallowing and can therefore be used for safe, indirect swallowing training during rehabilitation.
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