The frequency-dependent nonlinear dielectric increment of dipolar fluids in nonpolar fluids is often measured by using a stationary relaxation method in which two electric fields are used: The static direct current (dc) field of high strength causing the dielectric nonlinearity, and the probing alternating current (ac) field of low strength and high frequency. When a nonlinear composite is subj...

a b s t r a c tthe applications of neurophysiological therapy techniques range far and few in the realm of modern day medicine. however, the concept of electromagnetic stimulation, the basis for many noninvasive brain stimulation (nibs) techniques today, has been of interest to the scientific community since the late nineteenth century. recently, transcranial direct current stimulation (tdcs) a...

Transcranial electrical stimulation (tES) has become a valuable research tool for the investigation of neurophysiological processes underlying human action and cognition. In recent years, striking evidence for the neuromodulatory effects of transcranial direct current stimulation, transcranial alternating current stimulation, and transcranial random noise stimulation has emerged. While the weal...

UNLABELLED In this study we aimed to determine current distribution and short-term analgesic effects of transcranial direct current stimulation (tDCS) in fibromyalgia using different electrode montages. For each electrode montage, clinical effects were correlated with predictions of induced cortical current flow using magnetic resonance imaging-derived finite element method head model. Thirty p...

OBJECTIVE Transcranial direct current stimulation (tDCS) aims to alter brain function non-invasively via electrodes placed on the scalp. Conventional tDCS uses two relatively large patch electrodes to deliver electrical current to the brain region of interest (ROI). Recent studies have shown that using dense arrays containing up to 512 smaller electrodes may increase the precision of targeting ...

BACKGROUND Patients with Alzheimer's disease frequently elicit neuropsychiatric symptoms as well as cognitive deficits. Above all, depression is one of the most common neuropsychiatric symptoms in Alzheimer's disease but antidepressant drugs have not shown significant beneficial effects on it. Moreover, electroconvulsive therapy has not ensured its safety for potential severe adverse events alt...

Cognitive performance, including performance on working memory (WM) tasks declines with age. Changes in brain activations are one presumed contributor to WM decline in the healthy aging population. In particular, neuroimaging studies show that when older adults perform WM tasks there tends to be greater bilateral frontal activity than in younger adults. We hypothesized that stimulating the pref...