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Juliana Yordanova

6 papers in the library · 49 citations · publishing 2020-2025

Papers

Common and distinct lateralised patterns of neural coupling during focused attention, open monitoring and loving kindness meditation

Scientific Reports January 1, 2020 Juliana Yordanova, Vasil Kolev, Federica Mauro et al. 42 citations

Different meditation practices—focused attention, open monitoring, and loving kindness—share a common brain connectivity pattern while also showing distinct neural signatures. Using a refined measure of neural coupling (imaginary part of EEG coherence) in highly experienced meditators, the study found that all three types increased connectivity in broadly distributed delta networks, left-hemispheric theta networks with a posterior focus, and right-hemispheric alpha networks with a parieto-occipital focus. Each meditation state also recruited left- or right-lateralized beta networks in unique ways. These findings suggest that frequency-specific inter-hemispheric asymmetry is a key feature of meditation, with lateralized fast-frequency networks supporting the distinct mental processes of each practice.

EEG oscillations reveal neuroplastic changes in pain processing associated with long-term meditation.

Scientific reports March 27, 2025 Juliana Yordanova, Valentina Nicolardi, Peter Malinowski et al. 4 citations

Long-term meditation practice is associated with a proactive top-down inhibition of brain regions that process the sensory aspects of pain, even when the meditator is not actively meditating. Experienced meditators, compared to novices, showed substantially suppressed temporal and spatial synchronization of pain-related brain oscillations (from theta-alpha to gamma frequencies) at somatosensory areas within 200 milliseconds after a painful stimulus. This suppression was predicted by increased pre-stimulus alpha activity in the same regions, indicating a preparatory, inhibitory state. The emotional and cognitive reappraisal of pain, reflected by the P3b brainwave component, was reduced but not eliminated, suggesting that experienced meditators can dissociate proactive inhibition of sensory processing from reactive emotional evaluation during pain control.

Distinct patterns of directed brain connectivity in focused attention, open monitoring and loving kindness meditation: An EEG Granger causality study with long-term meditators

bioRxiv July 4, 2025 Vasil Kolev, Kosio Beshkov, Peter Malinowski et al. 2 citations preprint

Long-term meditators show distinct patterns of directed brain connectivity depending on the type of meditation they practice. Using EEG and Granger causality analysis, the study found that focused attention meditation produces different neural communication pathways compared to open monitoring and loving-kindness meditation. Each meditation style engages unique brain networks, suggesting that different meditative practices shape brain connectivity in specific ways. These findings indicate that the brain's neural pathways adapt to the particular cognitive demands of each meditation technique.

Neuroplasticity of directed connectivity in long-term meditation: Evidence from EEG Granger causality

bioRxiv July 7, 2025 Vasil Kolev, Kosio Beshkov, Peter Malinowski et al. 1 citation preprint

Long-term meditation increases directed information flow from posterior to frontal brain regions and between the two frontal hemispheres. Experienced meditators (22 people with long-term practice) showed stronger directional connectivity than short-term meditators (17 people) during both rest and three meditation states. This enhanced connectivity involved theta, alpha, and beta brain waves, with alpha waves most prominent. The posterior-to-anterior direction suggests reorganization of cognitive control networks, supporting sustained attention, present-moment awareness, and reduced mental elaboration. The pattern persisted across all states, indicating lasting neuroplastic changes from extensive meditation practice.

Differential Effects of Meditation States and Traits on the Neural Mechanisms of Pain Processing

bioRxiv Preprint Server May 20, 2025 Vasil Kolev, Peter Malinowski, Antonino Raffone et al. preprint

Different types of meditation alter how the brain processes pain, but the effects depend on the specific meditation technique. Focused attention meditation reduced pain intensity and unpleasantness by modulating activity in the anterior cingulate cortex and insula, while open monitoring meditation reduced pain unpleasantness without affecting intensity, engaging different neural pathways. Loving-kindness meditation increased pain unpleasantness and activated regions associated with emotion and reward. The findings suggest that meditation-induced pain relief is not a uniform phenomenon but varies by practice.

Attentional and cognitive monitoring brain networks in long-term meditators depend on meditation states and expertise.

Scientific Reports March 1, 2021 Juliana Yordanova, Vasil Kolev, Valentina Nicolardi et al.

Meditation practice engages cognitive control systems in the brain. Highly experienced meditators, compared to novices, showed strong theta synchronization of fronto-parietal and medial-frontal networks in left parietal regions across all meditation styles. Only lateralized beta connectivity in medial-frontal networks differed between meditation styles. Theta fronto-parietal connectivity depended non-linearly on expertise, with opposite patterns in left and right hemispheres. Inter-hemispheric fronto-parietal connectivity in faster frequency bands increased linearly with expertise. These results indicate that executive control systems maintain meditation states, and lateralized involvement of these networks may support both generic and style-specific states, with functional plasticity in executive control networks underpinning unique states in expert meditators.