In turn, stabilization of the mandible allows the suprahyoid muscles to contract and consequently, movement of the hyoid bone upward and forward, guaranteeing safe deglutition.
Another study that evaluated electromyographic activity during deglutition suggested that, in volunteers with normal occlusion, the mandible is stabilized during deglutition due to the contraction of the mandible elevator muscles and the anterior suprahyoid muscles. These muscles elevate the hyoid bone to its highest position, and consequently, the anterior third of the tongue reaches the hard palate.
Oral myofunctional and electromyographic evaluation of the anterior suprahyoid muscles and tongue thrust in patients with Class II/1 malocclusion submitted to first premolar extraction.
Anecdotal evidence suggests that this exercise would aid in the pharyngeal peristalsis due to the improvement in the suprahyoid muscles
. However, this was not experimentally investigated and hence the present study investigated the effect of modified Shaker exercise in healthy young participants using cervical auscultation.
The suprahyoid muscles play an important role during swallowing because they are involved in the laryngeal elevation (26).
No studies were found comparing the electrical activity of the suprahyoid muscles during tongue pressure activities separately performed in the anterior and posterior palate region.
The choice of suprahyoid muscles (mylohyoid muscles, genius-hyoid, digastric and style-hyoid) to evaluate the effect of NMES in dysphagia intervention occurs for the importance of the contraction of these muscles in the swallowing.
Thus, this study aimed to verify the effect of NMES in the contraction of suprahyoid muscles during swallowing in post-stroke patients with oropharyngeal dysphagia.
The study by Vitti and Basmagian (1977)  back as a contribution demonstrating the EMG activation of muscles: the anterior digastric Venter, milohyolideous, geniohyoideous (suprahyoid muscles), medial pterygoid, masseter and temporal (muscles lifts the jaw) in different times of swallowing in humans.
(2000)  investigated the pathophysiology of dysphagia in amyotrophic lateral sclerosis (ALS) by clinical and electrophysiological measurements such as: larynx displacement from a piezoelectric sensor; electromyographic activity surface of suprahyoid muscles (EMG-MSH) and intramuscular electromyographic activity of the cricopharyngeal muscle (SMEI through needle electrodes) during swallowing of different water volumes (Table 1 and 2).
Activity patterns of the suprahyoid muscles
during swallowing of different fluid volumes.
The digastric muscle is a suprahyoid muscle
formed by two muscle bellies: one anterior and the other posterior.