Souza G G L, Mendonça-de-Souza A C F, Barros E M, Coutinho E F S, Oliveira L, Mendlowicz M V, Figueira I, Volchan E
Institute of Biophysics Carlos Chagas Filho, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil.
Stress. 2007 Nov;10(4):368-74. doi: 10.1080/10253890701419886.
Previous studies showed that heart period decreases during and recovers after an acute stress. We investigated if individual predispositions and emotional priming influence heart period recovery after a speech stress task. Psychometric scales and resting cardiac vagal tone were used to measure individual traits. The presentation of a sequence of either pleasant or unpleasant pictures, as emotional primers, preceded the speech stress. Heart period was measured throughout the experiment. Stress induced tachycardia irrespective of emotional priming or traits. In the recovery period, participants with higher resting cardiac vagal tone or presenting higher resilience significantly reduced the heart acceleration. Furthermore, these traits interacted synergistically in the promotion of the recovery of heart period. Pleasant priming also improved recovery for participants with lower negative affect. In conclusion, the stress recovery measured through heart period seemed dependent upon individual predispositions and emotional priming. These findings further strengthen previous observations on the association between greater cardiac vagal tone and the ability to regulate emotion.
先前的研究表明，在急性应激期间心率间期会降低，并在应激后恢复。我们研究了个体易感性和情绪启动是否会影响言语应激任务后的心率间期恢复。使用心理测量量表和静息心脏迷走神经张力来测量个体特征。在言语应激之前，呈现一系列愉快或不愉快的图片作为情绪启动刺激。在整个实验过程中测量心率间期。无论情绪启动刺激或个体特征如何，应激都会诱发心动过速。在恢复期，静息心脏迷走神经张力较高或表现出较高复原力的参与者显著降低了心率加速。此外，这些特征在促进心率间期恢复方面具有协同作用。愉快的启动刺激也改善了消极情绪较低的参与者的恢复情况。总之，通过心率间期测量的应激恢复似乎取决于个体易感性和情绪启动刺激。这些发现进一步强化了先前关于较高的心脏迷走神经张力与情绪调节能力之间关联的观察结果。
