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Grace Mackin

Meditation Research Program, Department of Psychiatry, Massachusetts General Hospital, Harvard Medical School, Boston, USA.

2 papers in the library · 4 citations · publishing 2025

Papers

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

An advanced meditative state called extended cessation (EC), where consciousness is voluntarily suspended and later resumes with heightened clarity and equanimity, provides a natural model for studying consciousness. Using ultra-high-resolution 7T fMRI with dense sampling of three individuals, the research mapped whole-brain activity, connectivity, gradients, and eigenmodes during EC, linking them to brain chemistry and cognitive maps. EC increased activity in sensory regions, reduced activity in higher-order association areas, subcortex, and brainstem, expanded the principal cortical gradient, and decreased low-order global eigenmodes.

The neuroscience of highly stable, positive, and refined states of consciousness during jhana-type advanced concentration absorption meditation (ACAM-J).

bioRxiv : the preprint server for biology November 13, 2025 Winson F Z Yang, Ruby Potash, Grace Mackin et al. preprint

Advanced concentration absorption meditation (ACAM-J) produces a distinct, structured mode of awareness characterized by stable positive states and reduced narrative thought. In the first ultra-high-field (7T) fMRI study of jhana meditation, neural trajectories across eight successive states showed reorganization from anterior to posterior brain regions, flattening of cortical hierarchies, and nonlinear changes in global brain harmonics. These brain changes were tightly linked to equanimity, attentional stability, and behavior. Brain activity patterns associated with ACAM-J related more to attentional monitoring than to suffering-related processes. The findings suggest advanced meditation offers a framework for understanding psychological transformation and supporting human well-being.