Department of Psychology, Center for Development and Behavioral Neuroscience, Binghamton University, PO Box 6000, Binghamton, NY 13902, USA.
Behav Brain Res. 2012 Jan 15;226(2):613-8. doi: 10.1016/j.bbr.2011.10.001. Epub 2011 Oct 8.
This study examined ontogenetic differences in anticipatory 50 kHz ultrasonic vocalization (USV) production to social interactions in male Sprague-Dawley rats. Adults increased USVs across days when tested socially but not when left alone (Experiment 1), and displayed anticipatory USVs to return to the cage-mate (Experiment 2). Adolescents did not display evidence of anticipatory USVs. To the extent that anticipatory USVs index incentive salience, this suggests an adolescent attenuation of incentive salience of social interactions.
这项研究考察了雄性斯普拉格-道利大鼠在社会互动中预期性 50 kHz 超声波发声(USV)产生的个体发育差异。成年大鼠在社交测试时会在几天内增加 USV,但在独处时不会(实验 1),并且会对返回笼伴做出预期性 USV(实验 2)。青少年则没有表现出预期性 USV 的迹象。在预期性 USV 反映激励显著性的程度上,这表明青少年对社交互动的激励显著性减弱。