Counteracting the Slowdown of Reaction Times in a Vigilance Experiment With 40-Hz Transcranial Alternating Current Stimulation
| Autor: | Christoph Herrmann, Fabian Otto-Sobotka, Dominik de Sordi, Birte Sofie Löffler, Sebastian Fudickar, Heiko I. Stecher, Andreas Hein |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Gamma wave
Adult Male medicine.medical_specialty Slowdown medicine.medical_treatment media_common.quotation_subject Biomedical Engineering Audiology Transcranial Direct Current Stimulation Choice Behavior 050105 experimental psychology Electronic mail 03 medical and health sciences Young Adult 0302 clinical medicine Gamma Rhythm Internal Medicine medicine Reaction Time Humans 0501 psychology and cognitive sciences media_common Transcranial alternating current stimulation Visual Cortex Transcranial direct-current stimulation General Neuroscience 05 social sciences Rehabilitation Electroencephalography Healthy Volunteers Alpha Rhythm Visual cortex medicine.anatomical_structure Linear Models Female Arousal 030217 neurology & neurosurgery Vigilance (psychology) |
| Zdroj: | IEEE transactions on neural systems and rehabilitation engineering : a publication of the IEEE Engineering in Medicine and Biology Society. 26(10) |
| ISSN: | 1558-0210 |
| Popis: | Indicators for a decrement in vigilance are a slowdown in reaction times and an increase in alpha power in the electroencephalogram in posterior regions of the brain. Transcranial alternating current stimulation (tACS) is a neuropsychological technique that has been found to interact with intrinsic brain oscillations and is able to enhance cognitive and behavioral performance. Recent studies show that tACS in the gamma frequency range (30–80 Hz) is able to downregulate amplitudes in the alpha frequency range (8–12 Hz), in accordance to the effect referred to as cross-frequency coupling, where intrinsic alpha and gamma waves modulate each other. We applied 40 Hz gamma-tACS to the visual cortex during a vigilance experiment and investigated if stimulation improves reaction times and error rates with time-on-task. In our sham controlled experiment, participants completed two blocks of 30 minutes duration while performing the same visual two-choice task. The first block was used as BASELINE. A statistical analysis with a linear mixed model revealed a significantly lower increase of modeled reaction times over time in the INTERVENTION-block of the tACS-group as compared with their BASELINE-block whereas there was no significant change between the BASELINE- and INTERVENTION-block for the SHAM-group. Error rates did not differ between groups. This paper indicates that gamma-tACS can enhance performance in vigilance tasks as it significantly decreased the slowdown of reaction times in our study. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|