Repetitive Transcranial Magnetic Stimulation Improves Handwriting in Parkinson's Disease. (8th May 2013)

• Record Type: Journal Article
• Authors: Randhawa, Bubblepreet Kaur; Farley, Becky Gwen; Boyd, Lara April
• Other Names: Earhart Gammon M. Academic Editor.
• Is Part Of: Parkinson's disease. Volume 2013(2013)
• Publication Date: 2013-05-08
• Subjects: Parkinson's disease -- Periodicals; Parkinson's disease -- Treatment -- Periodicals; 616.833005
• DOI: 10.1155/2013/751925
• Languages: English
• ISSNs: 2090-8083

Abstract

Abstract : Background . Parkinson disease (PD) is characterized by hypometric movements resulting from loss of dopaminergic neurons in the substantia nigra. PD leads to decreased activation of the supplementary motor area (SMA); the net result of these changes is a poverty of movement. The present study determined the impact of 5 Hz repetitive transcranial magnetic stimulation (rTMS) over the SMA on a fine motor movement, handwriting (writing cursive "l"s), and on cortical excitability, in individuals with PD. Methods . In a cross-over design, ten individuals with PD were randomized to receive either 5 Hz or control stimulation over the SMA. Immediately following brain stimulation right handed writing was assessed. Results . 5 Hz stimulation increased vertical size of handwriting and diminished axial pressure. In addition, 5 Hz rTMS significantly decreased the threshold for excitability in the primary motor cortex. Conclusions . These data suggest that in the short term 5 Hz rTMS benefits functional fine motor task performance, perhaps by altering cortical excitability across a network of brain regions. Further, these data may provide the foundation for a larger investigation of the effects of noninvasive brain stimulation over the SMA in individuals with PD.