Effects of theta burst stimulation protocols on phosphene threshold
Effects of theta burst stimulation protocols on phosphene threshold
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DOI:
10.1016/j.clinph.2006.03.019
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发表时间:
2006-08-01
影响因子:
4.7
通讯作者:
Rothwell, John C.
中科院分区:
文献类型:
--
作者:
Franca, Michele;Koch, Giacomo;Rothwell, John C.
Objective: We investigated the effects on occipital cortex, of two newly developed methods of repetitive transcranial magnetic stimulation (rTMS): continuous and intermittent theta burst stimulation (cTBS and iTBS), that lead to long lasting changes in excitability when applied over primary motor cortex.Methods: Phosphene threshold to a single TMS pulse was measured before and after application of either continuous or intermittent theta burst stimulation (cTBS/iTBS; 600 total pulses at 80% phosphene threshold).Results: In our cohort, cTBS increased phosphene threshold by an average of 10%. In contrast, iTBS, which transiently increases motor cortex excitability, had no effect on phosphene threshold.Conclusions: cTBS can be applied successfully to non-motor areas of cortex, but iTBS may need modification to produce maximal effects.Significance: cTBS maybe a new useful too] in disorders characterized by an abnormal state of activity of the visual cortex. (c) 2006 International Federation of Clinical Neurophysiology. Published by Elsevier Ireland Ltd. All rights reserved.