Mean heart rate recorded during subjects' overnight polysomnography, separated for NREM sleep (P = .05), REM sleep (P = .004), and Wake (P = .01), is shown comparing Veterans without sensory sensitivity and with PTSD (open bars, n = 8) compared to Veterans with both light and noise sensitivity, and PTSD (filled bars, n = 21). These data suggest sensory sensitivity is associated with elevated heart rate irrespective of PTSD status. Students two-tailed t test, * = P < .05. NREM = non-rapid eye movement, PTSD = posttraumatic stress disorder, REM = rapid eye movement.