BACKGROUND AND PURPOSE:Repetitive transcranial magnetic stimulation of the primary motor cortex (M1) may improve outcomes after stroke. The aim of this study was to determine the effects of M1 theta burst stimulation (TBS) and standardized motor training on upper-limb function of patients with chronic stroke. METHODS:Ten patients with chronic subcortical stroke and upper-limb impairment were recruited to this double-blind, crossover, sham-controlled study. Intermittent TBS of the ipsilesional M1, continuous TBS of the contralesional M1, and sham TBS were delivered in separate sessions in conjunction with standardized training of a precision grip task using the paretic upper limb. RESULTS: Training after real TBS improved paretic-hand grip-lift kinetics, whereas training after sham TBS resulted in deterioration of grip-lift. Ipsilesional M1 excitability increased after intermittent TBS of the ipsilesional M1 but decreased after continuous TBS of the contralesional M1. Action Research Arm Test scores deteriorated when training followed continuous TBS of the contralesional M1, and this was correlated with reduced ipsilesional corticomotor excitability. CONCLUSIONS: Generally, TBS and training led to task-specific improvements in grip-lift. Specifically, continuous TBS of the contralesional M1 led to an overall decrement in upper-limb function, indicating that the contralesional hemisphere may play a pivotal role in recovery after stroke.
RCT Entities:
BACKGROUND AND PURPOSE: Repetitive transcranial magnetic stimulation of the primary motor cortex (M1) may improve outcomes after stroke. The aim of this study was to determine the effects of M1 theta burst stimulation (TBS) and standardized motor training on upper-limb function of patients with chronic stroke. METHODS: Ten patients with chronic subcortical stroke and upper-limb impairment were recruited to this double-blind, crossover, sham-controlled study. Intermittent TBS of the ipsilesional M1, continuous TBS of the contralesional M1, and sham TBS were delivered in separate sessions in conjunction with standardized training of a precision grip task using the paretic upper limb. RESULTS: Training after real TBS improved paretic-hand grip-lift kinetics, whereas training after sham TBS resulted in deterioration of grip-lift. Ipsilesional M1 excitability increased after intermittent TBS of the ipsilesional M1 but decreased after continuous TBS of the contralesional M1. Action Research Arm Test scores deteriorated when training followed continuous TBS of the contralesional M1, and this was correlated with reduced ipsilesional corticomotor excitability. CONCLUSIONS: Generally, TBS and training led to task-specific improvements in grip-lift. Specifically, continuous TBS of the contralesional M1 led to an overall decrement in upper-limb function, indicating that the contralesional hemisphere may play a pivotal role in recovery after stroke.
Authors: Vishwanath Sankarasubramanian; Andre G Machado; Adriana B Conforto; Kelsey A Potter-Baker; David A Cunningham; Nicole M Varnerin; Xiaofeng Wang; Ken Sakaie; Ela B Plow Journal: Clin Neurophysiol Date: 2017-03-21 Impact factor: 3.708
Authors: James R Carey; Huiqiong Deng; Bernadette T Gillick; Jessica M Cassidy; David C Anderson; Lei Zhang; William Thomas Journal: Restor Neurol Neurosci Date: 2014 Impact factor: 2.406
Authors: Michael A Dimyan; Monica A Perez; Sungyoung Auh; Erick Tarula; Matthew Wilson; Leonardo G Cohen Journal: Arch Phys Med Rehabil Date: 2014-01-16 Impact factor: 3.966
Authors: Kelsey A Potter-Baker; Corin E Bonnett; Patrick Chabra; Sarah Roelle; Nicole Varnerin; David A Cunningham; Vishwanath Sankarasubramanian; Svetlana Pundik; Adriana B Conforto; Andre G Machado; Ela B Plow Journal: J Stroke Cerebrovasc Dis Date: 2016-02-02 Impact factor: 2.136