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EVALUATION OF NEUROMODULATION USING MRI                         45



          be useful as an adjunct for individuals with poly-  motor cortex ameliorates chronic pain and
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          need to address these question more directly.    Weiskopf, N.; Driver, J.; Rothwell, J. C. Mapping
            MRI technologies have been successfully deployed   causal interregional influences with concurrent
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          of significant findings supporting the efficacy of   5.  Bikson, M.; Inoue, M.; Akiyama, H.; Deans, J.
          neuromodulation and are likely to be key to under-  K.; Fox, J. E.; Miyakawa, H.; Jefferys, J. G. Effects
          standing the biological effects of neuromodulation.   of uniform extracellular DC electric fields on
          Advanced structural (i.e., diffusion imaging) and   excitability in rat hippocampal slices in vitro. J.
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          effects of neuromodulation. These studies demon-  6.  Boggio, P. S.; Ferrucci, R.; Rigonatti, S. P.; Covre,
          strate improved white matter integrity measures and   P.; Nitsche, M.; Pascual-Leone, A.; Fregni,
          increased functional activation in the areas stimu-  F. Effects of transcranial direct current stim-
          lated. Volumetric and/or shape studies using MRI   ulation on working memory in patients with
          technologies have not been utilized to examine the   Parkinson’s disease. J. Neurol. Sci. 249(1):31-38;
          effects of neuromodulation, but such studies may   2006.
          represent an area of new research that can be explored.   7.  Boggio, P. S.; Rigonatti, S. P.; Ribeiro, R. B.;
          Regardless, it is clear that research using volumet-  Myczkowski, M. L.; Nitsche, M. A.; Pascual-
          ric, diffusion, and functional imaging methods has   Leone, A.; Fregni, F. A randomized, double-blind
          demonstrated the ability of MRI technology to cap-  clinical trial on the efficacy of cortical direct
          ture changes in the cortical and subcortical white/  current stimulation for the treatment of major
          gray matter areas of the brain in injury and disease   depression.  Int. J. Neuropsychopharmacol.
          that are undergoing repair (29,42,65,71,84). Even   11(2):249-254; 2008.
          healthy aging participants demonstrated structural   8.  Boggio, P. S.; Sultani, N.; Fecteau, S.; Merabet, L.;
          and shape changes in response to training paradigms   Mecca, T.; Pascual-Leone, A.; Basaglia, A.; Fregni,
          (23,25). This technology has also been useful in pre-  F. Prefrontal cortex modulation using transcra-
          dicting functional improvements or outcomes across   nial DC stimulation reduces alcohol craving:
          a number of patient populations (82,85). Thus, MRI   a double-blind, sham-controlled study. Drug
          analyses may yet prove helpful in documenting the   Alcohol Depend. 92(1-3):55-60; 2008.
          therapeutic impact of neuromodulation techniques.  9.  Boggio, P. S.; Khoury, L. P.; Martins, D. C.;
                                                           Martins, O. E.; de Macedo, E. C.; Fregni,
                                                           F. Temporal cortex direct current stimulation
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