Modulation of Posterior Default Mode Network Activity During Interoceptive Attention and Relation to Mindfulness.
Biological psychiatry global open science November 1, 2024 Dhakshin Ramanathan, Jason Nan, Gillian Grennan et al. 10 citations
Consistency of response times during a breath-monitoring task, measured with electroencephalography in 324 people aged 15 to 91, correlates with attentive performance on an exteroceptive inhibitory control task. On-task alpha band activity (8-12 Hz) was greater than at rest. Low-consistency and longer breath responses were associated with elevated brain activity, particularly in posterior default mode network (pDMN) regions. pDMN activity was inversely linked with functional connectivity to frontal networks during the task but not at rest, suggesting frontal networks regulate pDMN activity during interoceptive attention. Greater pDMN activity in the precuneus was linked to lower subjective mindfulness and was adaptively modulated by task difficulty. Elevated pDMN alpha activity serves as an objective neural marker for low-consistency responding during interoceptive breath attention.