Puzanovova Martina, Arbogast Patrick G, Smith Craig A, Anderson Julia, Diedrich André, Walker Lynn S
Department of Pediatrics/Division of Adolescent Medicine and Behavioral Science, Vanderbilt University School of Medicine, Nashville, TN, USA.
J Psychosom Res. 2009 Sep;67(3):235-43. doi: 10.1016/j.jpsychores.2009.02.007. Epub 2009 Apr 15.
To compare autonomic nervous system (ANS) activity and somatic symptoms in chronic abdominal pain (CAP) patients and well children during (a) resting baseline, (b) training in a cognitive task, and (c) random assignment to success vs. failure on the task.
The ECG was continuously recorded with a dual lead system (Biopac) in 45 CAP patients and 22 well children, ages 9-16 years (mean age=12.3). Heart rate variability (HRV) was analyzed during the 5-min resting baseline, training, and success/failure on the task. Performance expectations were assessed before the task. Gastrointestinal (GI) and non-GI somatic symptoms were assessed before and after the task.
Compared to well children, CAP patients reported lower expectations for their task performance and higher GI symptoms (P's<.05). During success, CAP patients exhibited significant increases in both sympathetic (P<.05) and parasympathetic (P<.05) activity, whereas well children exhibited no change in ANS activity. During failure, CAP patients exhibited significant increases in somatic symptoms (<.05) but no change in ANS activity.
The lower performance expectations of CAP patients compared to well children may have influenced their experience of success and contributed to differences in their autonomic activity.
比较慢性腹痛（CAP）患儿与健康儿童在（a）静息基线、（b）认知任务训练以及（c）任务成功与失败随机分配过程中的自主神经系统（ANS）活动和躯体症状。
采用双导联系统（Biopac）连续记录45例9至16岁（平均年龄 = 12.3岁）的CAP患儿和22例健康儿童的心电图。在5分钟的静息基线、训练以及任务成功/失败期间分析心率变异性（HRV）。在任务前评估表现预期。在任务前后评估胃肠道（GI）和非胃肠道躯体症状。
与健康儿童相比，CAP患儿对任务表现的预期较低，胃肠道症状较高（P <.05）。在成功期间，CAP患儿的交感神经（P <.05）和副交感神经活动（P <.05）均显著增加，而健康儿童的ANS活动无变化。在失败期间，CAP患儿的躯体症状显著增加（<.05），但ANS活动无变化。
与健康儿童相比，CAP患儿较低的表现预期可能影响了他们对成功的体验，并导致了自主神经活动的差异。
