海馬位置細胞的靶向激活驅動記憶引導的空間行為
作者:
小柯機器人發布時間:2020/11/9 22:21:00
英國倫敦大學學院Michael Häusser、Nick T.M. Robinson等研究人員合作發現,海馬位置細胞的靶向激活驅動記憶引導的空間行為。2020年11月6日,《細胞》在線發表了這一成果。
通過同時進行雙光子鈣成像和雙光子光遺傳學的「全光學」組合,研究人員鑑定並選擇性激活了編碼虛擬實境環境中行為相關位置的細胞。在空間記憶任務期間,對少量位置細胞的靶向刺激足以使動物的行為產生偏差,這提供了海馬位置細胞主動支持空間導航和記憶的因果證據。
據介紹,海馬對於空間導航和情景記憶形成至關重要。海馬位置細胞在環境中表現出空間選擇性的活動,並被認為能夠形成空間認知地圖的神經基礎,從而支持這些記憶功能。但是,尚未證明位置單元活動對空間導航行為的直接影響。
附:英文原文
Title: Targeted Activation of Hippocampal Place Cells Drives Memory-Guided Spatial Behavior
Author: Nick T.M. Robinson, Lucie A.L. Descamps, Lloyd E. Russell, Moritz O. Buchholz, Brendan A. Bicknell, Georgy K. Antonov, Joanna Y.N. Lau, Rebecca Nutbrown, Christoph Schmidt-Hieber, Michael Husser
Issue&Volume: 2020-11-06
Abstract: The hippocampus is crucial for spatial navigation and episodic memory formation. Hippocampal place cells exhibit spatially selective activity within an environment and have been proposed to form the neural basis of a cognitive map of space that supports these mnemonic functions. However, the direct influence of place cell activity on spatial navigation behavior has not yet been demonstrated. Using an 『all-optical』 combination of simultaneous two-photon calcium imaging and two-photon optogenetics, we identified and selectively activated place cells that encoded behaviorally relevant locations in a virtual reality environment. Targeted stimulation of a small number of place cells was sufficient to bias the behavior of animals during a spatial memory task, providing causal evidence that hippocampal place cells actively support spatial navigation and memory.
DOI: 10.1016/j.cell.2020.09.061
Source: https://www.cell.com/cell/fulltext/S0092-8674(20)31302-7
Cell:《細胞》,創刊於1974年。隸屬於細胞出版社,最新IF:36.216