Table 1.

Cerebral blood flow, respiration rate, and heart rate means (SEM) across conditions and sessions

CBFRespiration rateHeart rate
Session 1
    Rest: neutral74.12 (3.01)19.97 (1.29)72.53 (2.33)
    Rest: heat71.51 (2.93)20.45 (1.11)74.79 (2.39)
    ATB: neutral70.69 (3.56)17.05 (1.00)70.46 (1.79)
    ATB: heat67.90 (3.08)19.32 (1.33)74.07 (2.19)
Session 2
    Rest: neutral68.57 (3.17)16.72 (0.82)74.82 (3.08)
    Rest: heat66.82 (2.59)17.12 (0.93)77.32 (2.95)
    Meditation: neutral65.09 (3.59)11.55 (0.74)73.62 (2.77)
    Meditation: heat65.47 (3.86)9.47 (0.67)a75.38 (2.70)
  • CBF was lower when subjects were instructed to attend to the breath (n = 15). However, there were no differences between rest and ATB in session 1 or between rest and meditation in session 2.

  • aRespiration rate during heat stimulation and meditation was significantly lower than all other conditions (n = 10). Heat stimulation increased heart rate when compared with neutral stimulation (n = 9).