Attention to internal body sensations is practiced inmost meditation traditions. Many traditions state that this practice results in increased awareness of internal body sensations, but scientific studies evaluating this claim are lacking. We predicted that experienced meditators would display performance superior to that of nonmeditators on heartbeat detection, a standard noninvasive measure of resting interoceptive awareness. We compared two groups of meditators (Tibetan Buddhist and Kundalini) to an age-and body mass index-matched group of nonmeditators. Contrary to our prediction, we found no evidence that meditators were superior to nonmeditators in the heartbeat detection task, across several sessions and respiratory modulation conditions. Compared to nonmeditators, however, meditators consistently rated their interoceptive performance as superior and the difficulty of the task as easier. These results provide evidence against the notion that practicing attention to internal body sensations, a core feature of meditation, enhances the ability to sense the heartbeat at rest.
DescriptorsMeditation; Interoception; Heartbeat detection; Awareness; Respiration Meditation is a form of mental training that has been practiced for thousands of years that can be conceptualized as a family of complex emotional and attentional regulatory training regimens developed for various ends, including the cultivation of well-being and emotional balance (Lutz, Dunne, & Davidson, 2007). Although typically practiced in the context of spiritual traditions, there has been a notable increase in the therapeutic application of meditation as a complement in alternative medicine. (Arias, Steinberg, Banga, & Trestman, 2006;Astin, Shapiro, Eisenberg, & Forys, 2003;Barnes, Powell-Griner, McFann, & Nahin, 2004).Address reprint requests to: Sahib S. Khalsa, B.S., Neuroscience Graduate Program, Department of Neurology, University of Iowa, 200 Hawkins Drive, Iowa City, IA 52242, USA. E-mail: sahib-khalsa @uiowa.edu. 1 This delay, around 250 to 300 ms, has been shown to lead to the perception by accurate heartbeat detectors that heartbeats and tones are "simultaneous" (Brener et al., 1993;Eichler & Katkin, 1994;Jones, 1994;Knapp et al., 1997;Ring & Brener, 1992;Rouse et al., 1988;Schandry et al., 1993). 2 These intervals are similar to those observed when measuring the RPI from the finger pulse (Teng & Zhang, 2006). However, shorter intervals have been reported when measuring the RPI from the ear pulse, possibly due to the shorter distance traveled by the pulse wave (de Boer, Ring, Curlett, Ridley, & Carroll, 2007;de Boer, Ring, Wood, et al., 2007).
NIH Public Access
Author ManuscriptPsychophysiology. Author manuscript; available in PMC 2009 July 1. Most meditation traditions incorporate attention to internal body sensations as a component of the practice, particularly in the beginning stages of instruction, possibly because the availability of these sensations from moment to moment makes them a convenient object to focus on. The most com...