Figure 2From: Oral vs. pharyngeal dysphagia: surface electromyography randomized study A typical single water swallow of a healthy person with good coordination of MS, SUB and LSM muscle groups. Upper peak – SUB location, MS peak slightly precedes SUB peak, and LSM line is the lowest elevation without a clear peak. A – lip contact, B – a swallow (elevation – pharyngeal stage, drop – beginning of esophageal stage).Back to article page