Preliminary Evidence of “Other-Race Effect”-Like Behavior Induced by Cathodal-tDCS over the Right Occipital Cortex, in the Absence of Overall Effects on Face/Object Processing
Costantino, Andrea I., Titoni, Matilde, Bossi, Francesco, Premoli, Isabella, Nitsche, Michael A. and Rivolta, D. 2017. Preliminary Evidence of “Other-Race Effect”-Like Behavior Induced by Cathodal-tDCS over the Right Occipital Cortex, in the Absence of Overall Effects on Face/Object Processing. Frontiers in Neuroscience. 11, p. Art 661.
|Authors||Costantino, Andrea I., Titoni, Matilde, Bossi, Francesco, Premoli, Isabella, Nitsche, Michael A. and Rivolta, D.|
Neuromodulation techniques such as tDCS have provided important insight into the neurophysiological mechanisms that mediate cognition. Albeit anodal tDCS (a-tDCS) often enhances cognitive skills, the role of cathodal tDCS (c-tDCS) in visual cognition is largely unexplored and inconclusive. Here, in a single-blind, sham-controlled study, we investigated the offline effects of 1.5 mA c-tDCS over the right occipital cortex of 86 participants on four tasks assessing perception and memory of both faces and objects. Results demonstrated that c-tDCS does not overall affect performance on the four tasks. However, post-hoc exploratory analysis on participants' race (Caucasian vs. non-Caucasians), showed a “face-specific” performance decrease (≈10%) in non-Caucasian participants only. This preliminary evidence suggests that c-tDCS can induce “other-race effect (ORE)-like” behavior in non-Caucasian participants that did not show any ORE before stimulation (and in case of sham stimulation). Our results add relevant information about the breadth of cognitive processes and visual stimuli that can be modulated by c-tDCS, about the design of effective neuromodulation protocols, and have important implications for the potential neurophysiological bases of ORE.
|Journal||Frontiers in Neuroscience|
|Journal citation||11, p. Art 661|
|Digital Object Identifier (DOI)||doi:10.3389/fnins.2017.00661|
|Web address (URL)||https://doi.org/10.3389/fnins.2017.00661|
|30 Nov 2017|
|Publication process dates|
|Deposited||05 Jan 2018|
|Accepted||13 Nov 2017|
|Accepted||13 Nov 2017|
|Copyright information||© 2017 The authors. This Document is Protected by copyright and was first published by Frontiers.|
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