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.
Highlights
The development of different types of physical and mental exercises, such as relaxation, guided breathing (Doll et al, 2016), mental imagery (Cebolla et al, 2017), and meditation (Zorn et al, 2021), has acquired a paramount position in the Western world because of the increasing popular research of a singular serenity sustained by wellness practice (Cahn and Polich, 2006; Ryznar and Levine, 2021).As the mindfulness-based stress reduction method proposed by Kabat-Zinn (1982), the scientific interest for mindfulness intervention has augmented exponentially (Creswell, 2017)
Before undertaking the quantification of the alpha oscillation induced by the RB session during the arrest reaction (AR) testing, we have first examined the effect produced by the pulsed-wave light (PWL) stimulation on the EEG dynamics
These N331-P476 components were accompanied by an event-related synchronization (ERS) of the delta–theta–alpha frequency band peaking at the latency of 354.4 ± 69.1 ms and an intertrial coherency (ITC) in the same frequency band of 20– 40% of the trials occurring at the transition between the N331 and the P476 component (Figures 4A–C)
Summary
The development of different types of physical and mental exercises, such as relaxation, guided breathing (Doll et al, 2016), mental imagery (Cebolla et al, 2017), and meditation (Zorn et al, 2021), has acquired a paramount position in the Western world because of the increasing popular research of a singular serenity sustained by wellness practice (Cahn and Polich, 2006; Ryznar and Levine, 2021).As the mindfulness-based stress reduction method proposed by Kabat-Zinn (1982), the scientific interest for mindfulness intervention has augmented exponentially (Creswell, 2017). It is well known that the practice of meditation and even more mindfulness is not given to everyone This is one reason environments like chromotherapy rooms (Azeemi and Raza, 2005; Azeemi et al, 2019) suitable for meditation, such as the present Rebalance (RB) device, have been developed. In this technological setup, the search for optimal comfort was carried out within an enclosure whose ceiling includes a continuous series of LEDs arranged in bars radiating from the center. The successive lighting of these LEDs produces a visual sensation of waves in movement that we have qualified for pulsed-wave light (PWL) stimulation These eccentric and concentric visual stimulations at the theta–alpha rhythm may induce oscillatory entrainment. This brainwave entrainment is a new non-invasive technique able to reconfigure the oscillatory dynamics of the brain for a better mental health and cognitive performance (Lakatos et al, 2019; Addante et al, 2021; Poltorak, 2021; Quirk et al, 2021; Yadav et al, 2021)
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