Effects of Pulsed-Wave Chromotherapy and Guided Relaxation on the Theta-Alpha Oscillation During Arrest Reaction

Abstract

The search for the best wellness practice has promoted the development of devices integrating different technologies and guided meditation. However, the final effects on the electrical activity of the brain remain relatively sparse. Here, we have analyzed of the alpha and theta electroencephalographic oscillations during the realization of the arrest reaction (AR; eyes close/eyes open transition) when a chromotherapy session performed in a dedicated room [Rebalance (RB) device], with an ergonomic bed integrating pulsed-wave light (PWL) stimulation, guided breathing, and body scan exercises. We demonstrated that the PWL induced an evoked-related potential characterized by the N2-P3 components maximally recorded on the fronto-central areas and accompanied by an event-related synchronization (ERS) of the delta–theta–alpha oscillations. The power of the alpha and theta oscillations was analyzed during repeated ARs testing realized along with the whole RB session. We showed that the power of the alpha and theta oscillations was significantly increased during the session in comparison to their values recorded before. Of the 14 participants, 11 and 6 showed a significant power increase of the alpha and theta oscillations, respectively. These increased powers were not observed in two different control groups (n = 28) who stayed passively outside or inside the RB room but without any type of stimulation. These preliminary results suggest that PWL chromotherapy and guided relaxation induce measurable electrical brain changes that could be beneficial under neuropsychiatric perspectives.

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“…Consequently, when challenged with a stressor, MBI can reduce the impact of stress-related responses, such as disrupted sleep that are related to autonomic dysregulation ( Meerlo et al, 2008 ). Evidence suggests that neuro-meditation using the Rebalance© Impulse significantly increases the time spent in the theta–alpha oscillation power spectrum compared to a matched control ( Cheron et al, 2022 ). While speculative, this observation suggests that the improved sleep and cardiac regulation reported in the present study may be due to the Rebalance© Impulse enabling the participants to experience a greater amount of theta activity.…”

“…The G-con group did not receive any treatment. Rebalance© Impulse is a non-invasive cognitive stimulation and mindfulness training device based on applied neuroscience ( Creswell, 2017 ; Cheron et al, 2022 ). During the session, participants lied down in a “zero gravity” position ( Figure 2 ).…”

“…The mindfulness training included sound therapy and coach-guided meditation associated with light stimulations (synchromotherapy). This device has already been the subject of a scientific study ( Cheron et al, 2022 ). The software adapted the frequency of light stimulations based on the real-time reading of the dominant wave at the beginning of the Rebalance© Impulse session to bring the brain biorhythm into the so-called alpha zone (between 8 and 13 Hz).…”