In the Journal of Rehabilitaiative Medicine (J Rehabil Med 2009; 41: 162–165) a study suggests that inhibitory affects of low freequency repetitive transcranial magnetic stimulation to the unimpaired hemisphere of the brain might act in conjunction with therapy to treat strokes.

This study suggests that low-frequency TMS
of the posterior parietal cortex can significantly improve the
symptoms of VSN, with better results than conventional rehabilitation
alone. No patient in the treatment group had any
obvious adverse effects related to TMS during the study. In
summary, our results support the theory of inter-hemispheric
competition in the attentional network.
This could be a significant finding and used beyond the treatment of visual spatial neglect.
Repetitive Transcranial Magnetic Stimulation was also found to have obvious adverse affects
in this test. Research with rTMS for a wide variety of applications is currently being performed
in a variety of settings. TMS currently is an FDA-Cleared treatment for resistive depression.