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Tiago Arruda-Sanchez

3 papers in the library · 112 citations · publishing 2020-2026

Papers

Effects of Yoga Respiratory Practice (Bhastrika pranayama) on Anxiety, Affect, and Brain Functional Connectivity and Activity: A Randomized Controlled Trial

Frontiers in Psychiatry May 21, 2020 Morgana M. Novaes, Fernanda Palhano-Fontes, Heloisa Onias et al. 110 citations

Four weeks of Bhastrika pranayama, a yoga breathing exercise, significantly reduced anxiety and negative affect in thirty healthy young adults. Brain scans showed that the practice modulated activity in emotion-processing regions including the amygdala, anterior cingulate, anterior insula, and prefrontal cortex, and decreased functional connectivity between the anterior insula and lateral prefrontal cortex. Changes in connectivity between the ventrolateral prefrontal cortex and right anterior insula correlated with changes in anxiety. The authors note these analyses were preliminary and exploratory.

Expressive resource in a clinical psychedelic study: Art as an integration tool.

Progress in brain research January 1, 2025 Handersson Barros, Marcelo Falchi-Carvalho, Lucas O Maia et al. 2 citations

Psychedelic experiences, particularly those from DMT, are often intense and hard to put into words, which complicates therapeutic integration. In a Phase I clinical trial, participants created mandalas as a nonverbal expressive tool. The mandalas helped them symbolically express subjective content that was difficult to verbalize, thereby supporting integration. Despite this promise, expressive tools remain underused in psychedelic clinical protocols. Including art may enhance therapeutic benefits by deepening understanding and meaning of the experience.

Ayahuasca, DMT, and Mental Health: A Current Review of Scientific Studies

Current Addiction Reports February 21, 2026 Dráulio B. Araújo, Lucas O. Maia, Tiago Arruda-Sanchez et al.

Preclinical and clinical evidence suggests that ayahuasca, a traditional Amazonian brew containing DMT and β-carbolines, may treat depression, anxiety, post-traumatic stress disorder, substance use, eating, and personality disorders. Preclinical studies indicate enhanced neuroplasticity, reduced inflammation, and oxidative stress. Human neuroimaging shows decreased default mode network activity, increased functional connectivity and brain entropy, suggesting a flexible neural state and modulation of pathways related to neuroplasticity, inflammation, and stress response. The evidence is mainly observational, with users reporting emotional breakthroughs, increased self-awareness, and mystical experiences tied to therapeutic outcomes. Ayahuasca appears to target core psychological and neurobiological processes across disorders but requires caution in psychotic or bipolar individuals and should be administered with support. Randomized trials are needed to confirm efficacy and safety.