The study is planned as a cross-sectional prospective study. Healthy volunteers and stroke patients who are planned to be hospitalized in the Stroke clinic for rehabilitation in Istanbul Physical Medicine Rehabilitation Training and Research Hospital are evaluated and included in the study according to the inclusion and exclusion criteria.~Demographic data of patients (gender, age, height, weight, body mass index, comorbidity status, smoking/alcohol use, dominant extremity, stroke etiology, duration, side), functional status (Brunnstrom stages, Functional Ambulation Scale (FAS), Daily Living Activity (ADL) Index), Pulmonary Function Test (PFT) measurement results and bilateral diaphragm and abdominal muscle thicknesses and thickening ratio in ultrasonography, demographic data of healthy volunteers (gender, age, height, weight, body mass index, comorbidity status, smoking/alcohol use, dominant side), PFT measurement results and the dominant side diaphragm and abdominal muscle thicknesses and thickening ratio in ultrasonography is done and included in the study.~In the ultrasonographic evaluation of the participants, using a 7-12 Mhz linear Probe, measurements are made of the diaphragm at the end of tidal expiration and forced inspiration, abdominal muscles at the end of tidal expiration and at the end of forced expiration, while all respiratory muscles are lying in the supine position. Diaphragm thickness is measured between the 8th and 9th ribs at the level of the anteroaxillary line, rectus abdominis; 4 cm lateral of the umbilicus, transversus abdominis, external oblique, internal oblique muscles' measurement is made from the middle of the lowest part of the 12. rib and the highest point of the iliac crest and 2.5 cm in front of the midaxillary line. All measurements are repeated 3 times and the average value will be recorded.~Vital capacity[VC], forced vital capacity [FVC], forced expiratory volume 1 second [FEV1] , FEV1/FVC, maximal expiratory flow rate [PEF], maximum inspiratory pressure [MIP] maximum expiratory pressure [MEP] in patients' PFT ] measurement results are checked.~Intragroup and intergroup data are compared.
Ultrasonographic evaluation of respiratory muscle thickness in stroke patients, determination of its correlation with pulmonary function test (PFT) , and the first evaluation method to determine respiratory rehabilitation goals and to use it in the follow-up of the effectiveness of the treatment.