Closed-Loop Neurofeedback of Alpha Synchrony During Goal-Directed Attention
33 Pages Posted: 12 Aug 2020 Publication Status: Review CompleteMore...
Alpha oscillations in sensory cortex, under frontal control, desynchronize during attentive preparation. Here, in a selective attention study with simultaneous EEG, we first demonstrate that diminished anticipatory alpha synchrony between the mid-frontal region of the dorsal attention network and ventral visual sensory cortex (frontal-sensory synchrony (FSS)) significantly correlates with greater task performance. Then, in a double-blind, randomized controlled study in healthy adults, we implement closed-loop neurofeedback of the anticipatory alpha FSS signal over ten days of training, showing significant trial-by-trial modulation of the anticipatory alpha FSS measure during training, concomitant plasticity of stimulus-evoked alpha/theta responses, as well as transfer of benefits to response time improvements on a standard test of sustained attention. In a third study, we replicate closed-loop neurofeedback training in children with ADHD, showing trial-by-trial modulation of the anticipatory alpha FSS signal, and significant improvement of sustained attention response times. These findings demonstrate utility of cognitive-task-integrated neurofeedback.
Keywords: attention, cognitive neurofeedback, closed-loop, brain computer interface, synchrony, dorsal attention network, Attention Deficit Hyperactivity Disorder, anticipation, alpha suppression, neuroplasticity
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