Dias et al. (100) studied the effects of repetitive transcranial magnetic stimulation (rTMS) on vocal function in 30 individuals with PD. Stimulation of the primary motor cortex (M1)-mouth area induced a significant improvement in voice F0 and intensity. Stimulation of the left dorsolateral prefrontal cortex resulted in subjective improvement of voice-related quality of life, but not in objective measures of voice F0 and intensity. Pagni et al. (101) studied the effects of extradural motor cortex stimulation in three individuals with PD. They reported that unilateral stimulation resulted in improvement in speech and swallowing. Additional research is necessary to confirm these effects.
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Have you ever been envious of people who seem to have no end of clever ideas, who are able to think quickly in any situation, or who seem to have flawless memories? Could it be that they're just born smarter or quicker than the rest of us? Or are there some secrets that they might know that we don't?