Comparison of two different methods for assessing inspiratory muscle strength in patients with multiple system atrophy: a pilot study

Abstract

Introduction: In people with neuromuscular disease, the influence of the orofacial muscles can cause air leakage from the mouth. As a result, low values for inspiratory muscle strength may be due to air escape which caused by weakness of the facial muscles, true respiratory muscle weakness or submaximal effort. Also, loss of facial muscle movements can be seen in multiple system atrophy (MSA) due to symptoms of parkinsonism.