長時間的海馬尖波漣漪改善記憶
作者:
小柯機器人發布時間:2019/7/18 17:10:43
紐約大學Gyrgy Buzsáki研究團隊的一項最新研究揭示了長時間的海馬「尖波漣漪」能改善記憶。該項研究成果發表在2019年6月14日出版的《科學》上。
該研究組發現,在大鼠需要記憶的情況下,長時間的漣漪會增加。在迷宮學習過程中,通過光遺傳刺激延長自發產生的漣漪,而不是隨機產生的漣漪,可以增加記憶。隨機誘導產生的漣漪的神經元含量與短時自發產生的漣漪相似,空間信息較少。利用光遺傳學延長的漣漪的單個神經元放電量受到正在進行的、自然啟動的神經元序列的影響。延長的漣漪能夠招募代表迷宮兩臂的新神經元。長時間的海馬SPW-Rs能夠重演大部分計劃路線,這對記憶是至關重要的。
據了解,海馬尖波漣漪(SPW-Rs)被認為是記憶鞏固和行動規劃的一種機制。漣漪持續時間呈偏態分布,只存在少數長持續時間漣漪。
附:英文原文
Title: Long-duration hippocampal sharp wave ripples improve memory
Author: Antonio Fernández-Ruiz, Azahara Oliva, Eliezyer Fermino de Oliveira, Florbela Rocha-Almeida, David Tingley, Gyrgy Buzsáki
Issue&Volume:VOL 364, ISSUE 6445,14 JUNE 2019
Abstract: Hippocampal sharp wave ripples (SPW-Rs) have been hypothesized as a mechanism for memory consolidation and action planning. The duration of ripples shows a skewed distribution with a minority of long-duration events. We discovered that long-duration ripples are increased in situations demanding memory in rats. Prolongation of spontaneously occurring ripples by optogenetic stimulation, but not randomly induced ripples, increased memory during maze learning. The neuronal content of randomly induced ripples was similar to short-duration spontaneous ripples and contained little spatial information. The spike content of the optogenetically prolonged ripples was biased by the ongoing, naturally initiated neuronal sequences. Prolonged ripples recruited new neurons that represented either arm of the maze. Long-duration hippocampal SPW-Rs replaying large parts of planned routes are critical for memory.
DOI: 10.1126/science.aax0758
Source: https://science.sciencemag.org/content/364/6445/1082
Science:《科學》,創刊於1880年。隸屬於美國科學促進會,最新IF:41.037