The interindividual variability of transcranial magnetic stimulation effects: Implications for diagnostic use in movement disorders.

Although there is no doubt that these studies have provided useful insight into the pathophysiology of movement disorders, there is a clear disagreement among many studies that questions the validity of some of the so called "canonical" findings as diagnostic markers. However, useful findings remain and even those with higher variability can be used to support clinical diagnosis in selected cases. © 2019 International Parkinson and Movement Disorder Society.