Central and autonomic nervous system interaction is altered by short-term meditation

TLDR

The study investigates the mechanisms underlying the improved attention and self‑regulation observed after five days of integrative body‑mind training. The authors assessed physiological and neural responses at rest before, during, and after five days of IBMT versus relaxation training. Five days of IBMT produced superior autonomic and neural regulation compared with relaxation, evidenced by enhanced heart‑rate variability, skin‑conductance, EEG power, and stronger subgenual/ventral ACC activity, indicating improved coordination of body and mind that may inform future interventions.

Abstract

Five days of integrative body-mind training (IBMT) improves attention and self-regulation in comparison with the same amount of relaxation training. This paper explores the underlying mechanisms of this finding. We measured the physiological and brain changes at rest before, during, and after 5 days of IBMT and relaxation training. During and after training, the IBMT group showed significantly better physiological reactions in heart rate, respiratory amplitude and rate, and skin conductance response (SCR) than the relaxation control. Differences in heart rate variability (HRV) and EEG power suggested greater involvement of the autonomic nervous system (ANS) in the IBMT group during and after training. Imaging data demonstrated stronger subgenual and adjacent ventral anterior cingulate cortex (ACC) activity in the IBMT group. Frontal midline ACC theta was correlated with high-frequency HRV, suggesting control by the ACC over parasympathetic activity. These results indicate that after 5 days of training, the IBMT group shows better regulation of the ANS by a ventral midfrontal brain system than does the relaxation group. This changed state probably reflects training in the coordination of body and mind given in the IBMT but not in the control group. These results could be useful in the design of further specific interventions.