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Social buffering of plasma corticosterone and amygdala responses of young rats following exposure to periorbital shock: Implications for eyeblink conditioning development.
Behavioral Neuroscience ( IF 1.9 ) Pub Date : 2021-07-29 , DOI: 10.1037/bne0000462
Dragana I Claflin 1 , Darci M Gallimore 1 , Adam Koraym 1 , Allison Costello 1 , Michael B Hennessy 1 , Jennifer J Quinn 1
Affiliation  

The developmental onset of aversive learning processes depends on complex interactions between endocrine, neural, and social influences. Emergence of avoidance conditioning in rat pups is triggered by elevated plasma corticosterone activating the amygdala. Further, the mother's ability to buffer the corticosterone response delays the onset of avoidance in ˜2-week-old pups. Eyeblink conditioning (EBC) also develops during the pre-weaning period. In previous work, little or no conditioning was observed on Day 17 for pups housed in the home cage with mother and littermates between training sessions, whereas pups isolated between training sessions did show some conditioning. This suggests that social buffering may also delay the onset of this form of aversive learning. In the present study with Day-17 pups, one session of periorbital shock, the typical EBC unconditioned stimulus for young rat pups, resulted in lower plasma corticosterone levels and neural activity in the central nucleus of the amygdale (CeA) of pups returned to the mother and homecage following the session as compared to pups isolated following the shock session. These findings demonstrate social buffering of the physiological response to aversive stimulus exposure under conditions of EBC and support the hypothesis that social buffering of early adverse experience may adjust the timing of emergence of EBC in rat pups. (PsycInfo Database Record (c) 2021 APA, all rights reserved).

中文翻译:

暴露于眶周休克后年轻大鼠血浆皮质酮和杏仁核反应的社会缓冲:对眨眼调节发育的影响。

厌恶学习过程的发展开始取决于内分泌、神经和社会影响之间的复杂相互作用。大鼠幼崽的回避条件反射的出现是由激活杏仁核的血浆皮质酮升高触发的。此外,母亲缓冲皮质酮反应的能力延迟了约 2 周大的幼崽的回避发作。眨眼条件反射 (EBC) 也在断奶前阶段发展。在以前的工作中,在第 17 天,在训练课之间与母亲和同窝仔一起饲养在家庭笼子中的幼崽很少或没有观察到调节,而在训练课之间隔离的幼崽确实表现出一些调节。这表明社会缓冲也可能延迟这种厌恶学习形式的发生。在目前对第 17 天幼崽的研究中,一次眶周休克,与电击后隔离的幼鼠相比,幼鼠幼崽的典型 EBC 无条件刺激导致幼鼠的杏仁核 (CeA) 中央核 (CeA) 血浆皮质酮水平和神经活动降低。这些发现证明了在 EBC 条件下对厌恶刺激暴露的生理反应的社会缓冲,并支持早期不良经历的社会缓冲可能调整幼鼠 EBC 出现时间的假设。(PsycInfo 数据库记录 (c) 2021 APA,保留所有权利)。与休克后被隔离的幼崽相比,导致幼崽在休克后返回母亲和笼子的杏仁核中央核 (CeA) 的血浆皮质酮水平和神经活动较低。这些发现证明了在 EBC 条件下对厌恶刺激暴露的生理反应的社会缓冲,并支持早期不良经历的社会缓冲可能调整幼鼠 EBC 出现时间的假设。(PsycInfo 数据库记录 (c) 2021 APA,保留所有权利)。与休克后被隔离的幼崽相比,导致幼崽在休克后返回母亲和笼子的杏仁核中央核 (CeA) 的血浆皮质酮水平和神经活动较低。这些发现证明了在 EBC 条件下对厌恶刺激暴露的生理反应的社会缓冲,并支持早期不良经历的社会缓冲可能调整幼鼠 EBC 出现时间的假设。(PsycInfo 数据库记录 (c) 2021 APA,保留所有权利)。这些发现证明了在 EBC 条件下对厌恶刺激暴露的生理反应的社会缓冲,并支持早期不良经历的社会缓冲可能调整幼鼠 EBC 出现时间的假设。(PsycInfo 数据库记录 (c) 2021 APA,保留所有权利)。这些发现证明了在 EBC 条件下对厌恶刺激暴露的生理反应的社会缓冲,并支持早期不良经历的社会缓冲可能调整幼鼠 EBC 出现时间的假设。(PsycInfo 数据库记录 (c) 2021 APA,保留所有权利)。
更新日期:2021-07-29
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