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Interaction of mental and orthostatic stressors

Goswami, Nandu ; Lackner, Helmut K. ; Papousek, Ilona ; Jezova, Daniela ; Montani, Jean-Pierre ; Hinghofer-Szalkay, Helmut G.

In: Acta Astronautica, 2010, p. -

We assessed hemodynamic responses induced by orthostatic and mental stressors, using passive head up tilt (HUT) and mental arithmetic (MA), respectively. The 15 healthy males underwent three protocols: (1) HUT alone, (2) MA in supine position and (3) MA+HUT, with sessions randomized and ≥2 weeks apart. In relation to baseline, HUT increased heart rate (HR) (+20.4±7.1 bpm; p<0.001),...