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Matthew D. Sacchet

Harvard University, McLean Hospital

82 papers in the library · 1,334 citations · publishing 2012-2026

Papers

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Enhancing Meditative Development with Transcranial Focused Ultrasound: A Mixed-Methods Phenomenological Study of Neuromodulation in Experienced Meditators During a Ten-Day Retreat

October 8, 2025 Sebastian Ehmann, Brian Lord, Erica Cook et al. preprint

Emerging research suggests some of the most profound meditation-induced psychological transformations require mastery of mental skills that enable access to advanced meditative states, stages, and endpoints. Such development, however, often demands years of sustained practice and expert guidance. Transcranial focused ultrasound (tFUS) offers a novel means of potentially supporting meditative...

Whole-Brain Models of Advanced Concentrative Absorption Meditation: Approaching Critical Dynamics through Jhāna

bioRxiv September 25, 2025 Jakub Vohryzek, Edmundo Lopez-Sola, Winson F.z. Yang et al. preprint

Advanced meditation offers a powerful lens for investigating consciousness and for understanding how sustained training may contribute to human flourishing. In the spirit of neurophenomenology, we combine first-person reports with model-free empirical analyses and formal whole-brain modeling to investigate the mechanisms underlying advanced meditative states and minimal phenomenal experience...

Neuroelectrophysiological correlates of extended cessation of consciousness in advanced meditators: A multimodal EEG and MEG study

bioRxiv Preprint Server September 19, 2025 Kenneth Shinozuka, Winson F.z. Yang, Ruby M. Potash et al. 3 citations preprint

In some contemplative traditions, “extended cessation” (EC) refers to a state of advanced meditation in which the meditator intentionally suppresses their own consciousness and re-emerges with a profound sense of clarity and equanimity. Here, we present the first electrophysiological study of EC, in which five meditators underwent concurrent electroencephalography (EEG) and...

Endogenous suspension and reset of consciousness: 7T fMRI brain mapping of the extended cessation meditative endpoint

bioRxiv Preprint Server September 6, 2025 Winson F.z. Yang, Akila Kadambi, Kilian Abellaneda-Pérez et al. 4 citations preprint

Extended cessation (EC), an advanced meditative state in which consciousness is volitionally suspended and later reset with immense mental clarity, equanimity, and peace, offers an endogenous model for investigating the mechanisms of consciousness. Using ultra-high-resolution 7T fMRI with dense within-subject sampling (N=3), we quantified whole-brain activity, functional and effective...

Toward a Unified Model of Advanced Meditation, Human Development, Meditation Maps, and Transtradition Metaphors: Facing Impermanence, Suffering, and Death

Mindfulness July 29, 2025 Terje Sparby, Matthew D. Sacchet 6 citations

While there exists a large body of research on the possibility of measuring certain aspects of human development, what might be called inner development has mostly been neglected, in particular as it pertains to advanced meditation. A central aspect of this kind of development, which we call meditative development, is associated with access to bliss, peace, wisdom, and the reduction of...

Mindfulness Meditation Training Reshapes Somatomotor Edge-Centric Connectivity Underlying Somatic Awareness: Insights for Healthy and Depressed Individuals

medRxiv July 29, 2025 Yuwen He, Shan Lei, Wangli Si et al. preprint

Abstract Background Somatic awareness is a fundamental practice for novice mindfulness practitioners. It has been proposed that mindfulness meditation training (MMT) enhances brain function through somatic awareness in both non-clinical and clinical populations. However, the neural signatures underlying this mechanism remain poorly understood. Methods In our study, we conducted mindfulness...

The Third Wave of Meditation and Mindfulness Research and Implications for Challenging Experiences: Negative Effects, Transformative Psychological Growth, and Forms of Happiness

Mindfulness June 11, 2025 Terje Sparby, Matthew D. Sacchet 11 citations

Abstract Research on meditation and mindfulness in relation to challenging effects can be understood as consisting of at least two waves: The first wave focused on the efficacy of mindfulness and more broadly the clinically positive effects of meditation. The second wave mainly focused on increasing methodological rigor and uncovering underlying mechanisms. Research on the different kinds and...

Advanced and long-term meditation and the autonomic nervous system: A review and synthesis.

Neuroscience and Biobehavioral Reviews June 1, 2025 Idil Sezer, Matthew D. Sacchet 14 citations

Meditation has become prominent in both clinical and non-clinical applications for its effects on psychological and physical well-being. Long-term meditators, who have dedicated extensive time to their practice, present a unique opportunity to explore the effects of prolonged meditation training on the autonomic nervous system. Research has reported concomitant activation of both sympathetic...

Integrated Phenomenology and Brain Connectivity Demonstrate Changes in Nonlinear Processing in Jhana Advanced Meditation.

Journal of Cognitive Neuroscience May 14, 2025 Ruby M. Potash, Sean D. Van Mil, Mar Estarellas et al. 7 citations

We present a neurophenomenological case study investigating distinct neural connectivity regimes during an advanced concentrative absorption meditation called jhana (ACAM-J), characterized by highly stable attention and mental absorption. Using EEG recordings and phenomenological ratings (29 sessions) from a meditator with +20,000 hr of practice, we evaluated connectivity metrics tracking...

Risk Factors for Emergence of Sudden Unusual Mental or Somatic Experiences and Subsequent Suffering

Clinical psychological science : a journal of the Association for Psychological Science April 28, 2025 Malcolm J. Wright, Vanessa L. Cha, Melissa R. Streifert et al.

Emergent phenomena (EP)—sudden unusual mental or somatic experiences—are surprisingly widespread. Although EP often lead to positive impacts on well-being, they are sometimes followed by intense suffering. We examine potential risk factors and protective factors for EP and related suffering using logistic regression on general-population survey data (n = 3,133). The four strongest risk factors...

Mindfulness Meditation and Network Neuroscience: Review, Synthesis, and Future Directions.

Biological psychiatry. Cognitive neuroscience and neuroimaging April 1, 2025 Ruchika S Prakash, Anita Shankar, Vaibhav Tripathi et al. 13 citations

Network neuroscience is an interdisciplinary field, which can be used to understand the brain by examining the connections between its constituent elements. In recent years, the application of network neuroscience approaches to study the intricate nature of the structural and functional relationships within the human brain has yielded unique insights into its organization. In this review, we...

ENIGMA-Meditation: Worldwide Consortium for Neuroscientific Investigations of Meditation Practices.

Biological psychiatry. Cognitive neuroscience and neuroimaging April 1, 2025 Saampras Ganesan, Fernando A Barrios, Ishaan Batta et al. 6 citations

Meditation is a family of ancient and contemporary contemplative mind-body practices that can modulate psychological processes, awareness, and mental states. Over the last 40 years, clinical science has manualized meditation practices and designed various meditation interventions that have shown therapeutic efficacy for disorders including depression, pain, addiction, and anxiety. Over the past...

Advanced concentrative absorption meditation reorganizes functional connectivity gradients of the brain: 7T MRI and phenomenology case study of jhana meditation.

Cerebral cortex (New York, N.Y. : 1991) April 1, 2025 Umay Demir, Winson Fu Zun Yang, Matthew D. Sacchet 5 citations

There is growing scientific interest in advanced meditation, and particularly the Theravada Buddhist advanced concentrative absorption meditation known as jhana (ACAM-J). ACAM-J includes a series of eight consecutive meditative states, which are radically altered states of consciousness. The neuroscience of ACAM-J, specifically brain reorganization, remains underspecified in part due to the...

Mindful young brains and minds: a systematic review of the neural correlates of mindfulness-based interventions in youth.

Brain Imaging and Behavior April 1, 2025 Jovan Jande, Isaac N Treves, Samantha L Ely et al. 4 citations

This systematic narrative review examines neuroimaging studies that investigated the neural correlates of mindfulness-based interventions in youth (ages 0-18). We extracted 13 studies with a total of 467 participants aged 5-18 years from the MEDLINE database on February 21st, 2024. These studies included both typically developing youth and those at risk of developing or recovering from...

Practitioner perspectives on meditation-based preparation for psychedelic experiences

February 6, 2025 Rosalind McAlpine, Merve Utanğaç, Joanna Kuć et al. 2 citations preprint

The potential of meditation as a preparatory tool for psychedelic experiences lacks empirical investigation. We surveyed experienced practitioners (N=123) with substantial histories in both meditation and psychedelic use to examine meditation’s role in psychedelic preparation. Respondents expected meditation training to primarily enhance acceptance and present-moment focus during psychedelic...

Investigating the complex cortical dynamics of an advanced concentrative absorption meditation called jhanas (ACAM-J): a geometric eigenmode analysis.

Cerebral cortex (New York, N.Y. : 1991) February 5, 2025 Ruby M. Potash, Winson F.z. Yang, Brian Winston et al. 11 citations

Advanced meditation has been associated with long- and short-term psychological changes such as bliss, profound insight, and transformation of well-being. However, most advanced meditation neuroimaging analyses have implemented primarily spatially-localized approaches, focusing on discrete regional changes in activity rather than distributed dynamics. The present study uses a geometric...

Deconstructing the self and reshaping perceptions: An intensive whole-brain 7T MRI case study of the stages of insight during advanced investigative insight meditation.

Neuroimage 2025 Winson F.z. Yang, Avijit Chowdhury, Terje Sparby et al. 12 citations

The stages of insight (SoI) are a series of psychological realizations experienced through advanced investigative insight meditation (AIIM). SoI provide a powerful structured framework of AIIM for understanding and evaluating insight-based meditative development through changes in perception, experiences of self, cognition, and emotional processing. Yet, the neurophenomenology of SoI remains...

Mindfulness, cognition, and long-term meditators: Toward a science of advanced meditation.

Imaging neuroscience (Cambridge, Mass.) 2025 Sebastian Ehmann, Idil Sezer, Isaac N Treves et al. 9 citations

Mindfulness meditation is a systematic training in equanimity, sensory clarity, and concentration rooted in ancient contemplative traditions. Here, we synthesized cognitive-behavioral outcomes in long-term meditators (LTMs) resulting from diverse, prolonged meditation practices. Preliminary evidence suggests that LTMs exhibit increased cognitive-sensory integration and decoupling of affective...

Neurophysiological mechanisms of focused attention meditation: A scoping systematic review

Imaging Neuroscience 2025 Jonathan M. Lieberman, Patrick A. McConnell, Mar Estarellas et al. 9 citations

Focused attention meditation (FA) is a foundational and widely studied practice that cultivates sustained concentration by focusing on a specific object, such as the breath, while disengaging from distractions. Numerous studies have investigated the neurophysiological mechanisms of FA, examining aspects such as spectral power, connectivity patterns, and neural entropy. However, despite this...

Dynamic brain states underlying advanced concentrative absorption meditation: A 7-T fMRI-intensive case study.

Network neuroscience (Cambridge, Mass.) 2025 Isaac N Treves, Winson F.z. Yang, Terje Sparby et al. 6 citations

Advanced meditation consists of states and stages of practice that unfold with mastery and time. Dynamic functional connectivity (DFC) analysis of fMRI could identify brain states underlying advanced meditation. We conducted an intensive DFC case study of a meditator who completed 27 runs of jhāna advanced absorptive concentration meditation (ACAM-J), concurrently with 7-T fMRI and...

Brain stimulation enhances dispositional mindfulness in PTSD: an exploratory sham-controlled rTMS trial.

Frontiers in Psychiatry 2025 Kaveh Rayani, Andrea Grabovac, Peter Chan et al. 2 citations

Post-traumatic stress disorder (PTSD) is characterized by hypervigilance, intrusive thoughts, negative mood, and avoidant behaviors. Therapies involving mindfulness have been shown to reduce PTSD symptoms and modulate brain function. Pharmacological and brain stimulation interventions are also effective for treating PTSD. Non-invasive repeated transcranial magnetic stimulation (rTMS) of the...

Reimagining pain as an allostatic imperative: perspectives from contemplative traditions.

Neuroscience of Consciousness 2025 Catherine Prueitt, Idil Sezer, Matthew D. Sacchet

The motivational force of pain is undeniable. But what pain commands us to do, how we might satisfy this command, and if our experience of pain is inherently linked to suffering are far murkier topics. This paper brings together empirical studies of pain reprocessing during advanced meditation, the rise of allostatic paradigms to account for biological self-regulation, and the philosophy of...

The Mindful Brain: A Systematic Review of the Neural Correlates of Trait Mindfulness.

Journal of Cognitive Neuroscience November 1, 2024 Isaac N Treves, Kannammai Pichappan, Jude Hammoud et al. 35 citations

Trait self-report mindfulness scales measure one's disposition to pay nonjudgmental attention to the present moment. Concerns have been raised about the validity of trait mindfulness scales. Despite this, there is extensive literature correlating mindfulness scales with objective brain measures, with the goal of providing insight into mechanisms of mindfulness, and insight into associated...