Figure 3
From: Standardization of surface electromyography utilized to evaluate patients with dysphagia
Stages of the normal swallow (reflex part). Horizontal mark 3 – water intake, 3.5–4 – final oral stage, 4–4.5 – pharyngeal stage, 4.5–5.5 – initial esophageal stage. Upper peak – submental location, middle peak – masseter location, lower peak – infrahyoid muscles location. Total electric activity duration after water intake: 2.5 sec.