Objective: The aim of this study was to assess the effect of expiratory muscle training on the stomatognathic system in patients with stroke.
 Method: A total of 31 patients with stroke were included in the study: 16 patients with stroke (age=66.63±8.38, height=166.38±8.59, BMI=28.09±4.81) as the control group and 15 patients with stroke (age=65.60±7.62, height=168.20±8.78, BMI=28.95±6.92) as the study group. Temporomandibular joint range of motion and dysfunction, pressure pain threshold of masticatory muscles, facial asymmetry existence, head posture, oral hygiene, oral hygiene habit, masticatory performance, intraoral pH, deglutition, and deep neck flexor muscle endurance of the patients with stroke were assessed. Assessment methods were in order by digital caliper, the Fonseca Questionnaire, algometry, labial commissure and craniocervical angle measurement, general oral health assessment index, and questionnaire, sieve test, digital pH gauge, repetitive saliva swallow test, Eating Assessment Tool, and deep neck flexor endurance test. Patients with stroke in the study group were enrolled in an expiratory muscle training program consisting of 5 sets of 10 repetitions daily for three weeks in addition to conventional physiotherapy; the control group enrolled in the conventional physiotherapy program. Patients with stroke in the study group were called twice a week to assess their compliance with the expiratory muscle training.
 Results: In intragroup comparison significant increase was found in the inferior portion of the left masseter, mandibular protrusion, and a decrease in labial commissure angle and Fonseca Questionnaire score of the control group (p