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首页> 外文期刊>Pharmacology, Biochemistry and Behavior >Affiliation in periadolescent rats: behavioral and corticosterone response to social reunion with familiar or unfamiliar partners.
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Affiliation in periadolescent rats: behavioral and corticosterone response to social reunion with familiar or unfamiliar partners.

机译：青春期大鼠的隶属关系：与熟悉或不熟悉的伴侣进行社交聚会的行为和皮质酮反应。

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The aim of this study was to investigate whether the social relationship between periadolescent rats, which is characterized by a high expression of play behavior, resembles attachment or whether it reflects a nonspecific social attraction between peers. Sprague-Dawley rats have been kept in pairs with a conspecific of the same age and sex from the time of weaning (PND 21). On PND 34, the members of each pair were separated for a 24-h period and randomly assigned to one of three groups: a) immediately sacrificed (NT = nontreated); b) reunited for 30 min with their previous cagemate (FAM); or c) with an unfamiliar conspecific of the same age and sex (UNF). During the reunion, the occurrence of both social and nonsocial behaviors was scored. Overall, periadolescent UNF animals spent more time in social investigation than FAM rats, which were conversely more involved in cage-oriented activities. In addition, higher levels of rough-and-tumble play were expressed in encounters between UNF subjects than between FAM rats. Finally, within the female group, UNF rats were more involved in play soliciting and less in digging activity than FAM animals. Blood corticosterone levels, which were measured at the end of the separation period, were higher in females than in males and were significantly lower than following reunion in a novel environment. The degree of familiarity did not affect hormonal changes. Results suggest that periadolescent rats do not form attachment relationships with each other. However, partner familiarity appears to be an important variable affecting social relationships.
机译：这项研究的目的是调查以游戏行为的高表达为特征的青春期大鼠之间的社会关系是否类似于依恋，或者它是否反映了同龄人之间的非特异性社会吸引力。从断奶开始，将Sprague-Dawley大鼠与同龄和性别的同种动物成对饲养（PND 21）。在PND 34上，每对成员分开24小时，并随机分配到三组中的一组：a）立即处死（NT =未处理）; b）与先前的同伴（FAM）团聚30分钟;或c）年龄和性别相同（UNF）。团聚期间，对社交和非社交行为的发生进行了评分。总体而言，与联合国环境管理署（FAM）大鼠相比，联合国儿童基金会（UNF）的青春期前动物在社会调查上花费的时间更多，而后者则更多地参与了笼养活动。此外，与FAM大鼠之间相比，UNF受试者之间的相遇表达了更高水平的跌打。最后，在雌性组中，与FAM动物相比，UNF大鼠参与游戏的活动更多，而挖掘活动的活动较少。在分离期结束时测得的血液中皮质酮水平，女性高于男性，并且显着低于在新环境中团聚后的水平。熟悉程度不影响荷尔蒙变化。结果表明，青春期大鼠彼此之间没有形成依恋关系。但是，伙伴的熟悉程度似乎是影响社会关系的重要变量。

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