Reaction of the cardiac rhythm to sensomotor activity of varied difficulty.
D001143:Arousal / Q000502:physiology; D001288:Attention / Q000502:physiology; D001341:Autonomic Nervous System / Q000502:physiology; D004562:Electrocardiography; D006339:Heart Rate; D006801:Humans; D011597:Psychomotor Performance / Q000502:physiology*; D011930:Reaction Time / Q000502:physiology