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Ravindra P Nagendra

3 papers in the library · 11 citations · publishing 2022-2026

Papers

Enhanced dehydroepiandrosterone levels are positively correlated with N3 sleep stage in long-term mindfulness meditation practitioners.

Sleep science (Sao Paulo, Brazil) January 1, 2022 Ravindra P Nagendra, Talakad N Sathyaprabha, Bindu M Kutty 11 citations

Long-term Vipassana meditators show increased slow-wave (N3) and REM sleep compared to non-meditators. Evening cortisol levels are similar between groups, but early morning cortisol, diurnal dehydroepiandrosterone (DHEA), and melatonin are significantly higher in meditators. Diurnal DHEA correlates significantly with N3 sleep in meditators. Higher diurnal DHEA despite comparable cortisol suggests that long-term meditation modulates the hypothalamic-pituitary-adrenal (HPA) axis, influencing sleep architecture. This provides evidence for exploring mindfulness meditation as an intervention for insomnia.

DOI: 10.5935/1984-0063.20220039 Full text Mindfulness Dehydroepiandrosterone Hydrocortisone Melatonin +1

Neurophysiological features of dream recall and the phenomenology of dreams: Auditory stimulation impacts dream experiences.

Consciousness and cognition July 1, 2025 Gulshan Kumar, Safoora Naaz, Nahida Jabin et al.

Dream recall is more frequent after REM sleep than N2 sleep. During dream recall, EEG beta activity increases, functional connectivity within the default mode network strengthens, and the medial frontal cortex activates, regardless of sleep stage. Auditory stimulation during sleep can influence the emotional content of dreams, suggesting that targeted memory reactivation may be possible. These findings help clarify how conscious experience arises during sleep.

DOI: 10.1016/j.concog.2025.103869 Full text Default mode network Dream recall Beta activity Dream experience +6

Neurodynamic profiles in the alpha band distinguish different forms of meditation.

Neuroscience of consciousness January 1, 2026 Bianca Ventura, Andrea Buccellato, Saketh Malipeddi et al.

Vipassana and Shoonya meditation produce distinct alpha-band brain dynamics, with differences more apparent in temporal variability than in average activity. Vipassana, involving systematic body scanning, showed lower variability and more regular temporal patterns in both peak frequency and power of alpha oscillations. Shoonya, a non-directed attention practice, exhibited higher variability and irregularity in these measures. The findings suggest that dynamic features of brain activity, such as variability and temporal irregularity, may distinguish contemplative practices better than static averages, and could reflect a shared property of brain and experience.

DOI: 10.1093/nc/niag036 Full text Peak frequency sliding Power sliding Alpha oscillations Meditation techniques +1