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Table 3 Electric activity of m. masseter, submental-submandibular and infrahyoid muscles in a single swallow test, in μV (mean* ± standard deviation).

From: Oral vs. pharyngeal dysphagia: surface electromyography randomized study

  Dental surgery Oral infections Tonsillitis Control
  Group 1 Group 2 Group 3 Group 4
Masseter 9.115 ± 4.2 11.25 ± 5.37 28.33 ± 6.74 17.454 ± 7.55
Submental 30.750 ± 9.34 31.63 ± 8.35 34.2 ± 8.54 36.75 ± 10.34
Infrahyoid 14.765 ± 3.12 14.422 ± 4.65 36.73 ± 9.62 15.773 ± 6.95
  1. * Real mean is displayed (raw computer-calculated mean minus the mean resting potential of an actual muscle covered by skin (2.808 μV = for the submental location and infrahyoid location, 2.495 μV = for the masseter location), further normalized.