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Attentional processing consists of a set of processes that manage the flow of information through the nervous system and appropriately allocate attentional resources to relevant stimuli. Specific networks in the frontal and parietal regions appear to be involved in attention. The cerebellum has been identified as a subcortical structure that interacts with cortical brain areas, thereby controlling attentional processes. The aim of this study was to investigate the role of the cerebellum in attentional processing of the stimulus using a P300 Novelty task. We studied the effects of transcranial Direct Current Stimulation (tDCS) delivered over the left cerebellar hemisphere in cathodal, anodal and sham sessions on the P300 components in healthy subjects. Only cathodal cerebellar tDCS significantly reduced the amplitude of the N1, N2 and P3 components for both the target and novel stimuli. Moreover, N1 latency for all the stimuli was shorter after the cathodal tDCS session than after the sham or anodal sessions. These results point to a role of the cerebellum in attentional processing of the stimulus. The cerebellum may act indirectly by regulating and managing the activation and inhibition levels of the cortical areas involved in attentional networks.

Original publication

DOI

10.1016/j.neuropsychologia.2016.02.002

Type

Journal article

Journal

Neuropsychologia

Publication Date

04/2016

Volume

84

Pages

127 - 135

Keywords

Attention, Cerebellum, P300, tDCS, Acoustic Stimulation, Adult, Attention, Auditory Perception, Cerebellum, Electroencephalography, Evoked Potentials, Fatigue, Female, Humans, Male, Neuropsychological Tests, Pain, Self Report, Transcranial Direct Current Stimulation