Anodal-tDCS over the human right occipital cortex enhances the perception and memory of both faces and objects

Barbieri, Marica; Negrini, Marcello; Nitsche, Michael A.; Rivolta, Davide

doi:10.1016/j.neuropsychologia.2015.12.030

Cited by 47 publications

(71 citation statements)

References 68 publications

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“…However, the typical current amplitude and polarity that resulted in activation was −5 µA or, in some cases, a second application of current. These results parallel human tDCS experiments wherein amounts of current applied are enough to produce behavioral changes after stimulation with very subtle, if any, effects during current application and with reports that more than one administration of tDCS enhance behavioral outcomes 35,36. We found that the threshold current to induce changes in the response to light stimuli in the isolated retina-eyecup was nearly a 1,000-fold less than the 2 mA currents typically administered in human tDCS studies.…”

Section: Discussionsupporting

confidence: 85%

Effects of tDCS-like electrical stimulation on retinal ganglion cells

Strang

Ray

Boggiano

et al. 2018

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PurposeTranscranial direct current stimulation (tDCS) has been studied in humans for its effects on enhancement of learning, amelioration of psychiatric disorders, and modification of other behaviors for over 50 years. Typical treatments involve injecting 2 mA current through scalp electrodes for 20 minutes, sometimes repeated weekly for two to five sessions. Little is known about the direct effects of tDCS at the neural circuit or the cellular level. This study assessed the effects of tDCS-like currents on the central nervous system by recording effects on retinal ganglion cell responsiveness using the rabbit retina eyecup preparation.Materials and methodsWe examined changes in firing to On and Off light stimuli during and after brief applications of a range of currents and polarity and in different classes of ganglion cells.ResultsThe responses of Sustained cells were consistently suppressed during the first round of current application, but responses could be enhanced after subsequent rounds of stimulation. The observed first round suppression was independent of current polarity, amplitude, or number of trials. However, the light responses of Transient cells were more likely to be enhanced by negative currents and unaffected or suppressed by first round positive currents. Short-duration currents, that is, minutes, as low as 2.5 µA produced a remarkable persistency of firing changes, for up to 1.5 hours, after cessation of current.ConclusionThe results are consistent with postulated tDCS alteration of central nervous system function, which outlast the tDCS session and provide evidence for the isolated retina as a useful model to understand tDCS actions at the neuronal level.

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Section: Discussionsupporting

confidence: 85%

Effects of tDCS-like electrical stimulation on retinal ganglion cells

Strang

Ray

Boggiano

et al. 2018

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“…Reis and Fritsch (2011) suggest that stimulation is most effective when delivered during the processing of task-relevant information. However, there is also evidence that performance is most improved after stimulation is over (Barbieri et al, 2016). More data are needed to determine whether performing tasks during stimulation results in longer lasting effects of tDCS.…”

Section: Tdcs Can Last a Long Timementioning

confidence: 99%

Using transcranial direct-current stimulation (tDCS) to understand cognitive processing

Reinhart

Cosman

Fukuda

et al. 2016

Atten Percept Psychophys

127

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Noninvasive brain stimulation methods are becoming increasingly common tools in the kit of the cognitive scientist. In particular, transcranial direct-current stimulation (tDCS) is showing great promise as a tool to causally manipulate the brain and understand how information is processed. The popularity of this method of brain stimulation is based on the fact that it is safe, inexpensive, its effects are long lasting, and you can increase the likelihood that neurons will fire near one electrode and decrease the likelihood that neurons will fire near another. However, this method of manipulating the brain to draw causal inferences is not without complication. Because tDCS methods continue to be refined and are not yet standardized, there are reports in the literature that show some striking inconsistencies. Primary among the complications of the technique is that the tDCS method uses two or more electrodes to pass current and all of these electrodes will have effects on the tissue underneath them. In this tutorial, we will share what we have learned about using tDCS to manipulate how the brain perceives, attends, remembers, and responds to information from our environment. Our goal is to provide a starting point for new users of tDCS and spur discussion of the standardization of methods to enhance replicability.

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“…Ruffman et al, 2008), and c) prior work showing that social processing (including emotion perception) can be improved following tES in young adult participants (e.g. Santiesteban et al, 2012Santiesteban et al, , 2015Hogeveen et al, 2014Hogeveen et al, , 2016Janik et al, 2015;Romanska et al, 2015;Barbieri et al, 2016;Liepelt et al, 2016;Sellaro et al, 2016). Indeed, in other domains (e.g.…”

Section: Introductionmentioning

confidence: 98%

Enhancing anger perception in older adults by stimulating inferior frontal cortex with high frequency transcranial random noise stimulation

Yang

Banissy

2017

Neuropsychologia

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Extensive behavioural evidence has shown that older people have declined ability in facial emotion perception. Recent work has begun to examine the neural mechanism that contribute to this, and potential tools to support emotion perception during aging. The aim of this study was to investigate whether high frequency tRNS applied to the inferior frontal cortex would enhance facial expression perception in older adults. Healthy aged adults (60+ years) were randomly assigned to receive active high-frequency or sham tRNS targeted at bilateral inferior frontal cortices. Each group completed tests of facial identity perception, facial happiness perception and facial anger perception. These tasks were completed before and after stimulation. The results showed that, compared to the sham group, the active tRNS group showed greater gains in performance after stimulation in anger perception (relative to performance before stimulation). The same tRNS stimulation did not significantly change performance on the two other face perception tasks assessing facial identity and facial happiness perception. Examination of how inter-individual variability related to changes in anger perception following tRNS indicated that the degree of performance change in anger perception following active tRNS to inferior frontal cortex was predicted by baseline ability and gender of older adult participants. The findings suggest that high frequency tRNS may be a potential tool to aid anger perception in typical aging, but flag that performance variability and gender may interact with stimulation leading to different outcomes.

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Anodal-tDCS over the human right occipital cortex enhances the perception and memory of both faces and objects

Cited by 47 publications

References 68 publications

Effects of tDCS-like electrical stimulation on retinal ganglion cells

Effects of tDCS-like electrical stimulation on retinal ganglion cells

Using transcranial direct-current stimulation (tDCS) to understand cognitive processing

Enhancing anger perception in older adults by stimulating inferior frontal cortex with high frequency transcranial random noise stimulation

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