黑質中存在一個睡眠和運動的共同控制樞紐
作者:
小柯機器人發布時間:2020/1/29 16:37:40
近日,美國加州大學伯克利分校Yang Dan及其研究小組發現,黑質中存在一個睡眠和運動的共同控制樞紐。相關論文2020年1月24日發表在《科學》上。
研究人員發現,黑質網狀組織(SNr)中的共享神經元共同調控了睡眠與覺醒的大腦狀態和運動行為。通過對小鼠的籠養行為進行分析,可以確定四種具有不同水平的大腦喚醒和運動活動的狀態:運動、非運動、安靜的清醒和睡眠;過渡不是隨機發生的,而是主要發生在鄰近狀態之間。穀氨酸脫羧酶2而非SNrγ-氨基丁酸(GABA)釋放(GABAergic)神經元的小白蛋白神經元亞群在低運動活動和喚醒狀態下優先活躍。它們的激活或失活分別影響自然行為轉變的方向,並促進或抑制睡眠。這些GABA能神經元整合了廣泛的輸入信號,並通過大量的附帶投射來支配多個刺激和運動控制迴路。
據了解,大腦的覺醒狀態與動物運動狀態有關。這些狀態變化如何協調尚不清楚。
附:英文原文
Title: A common hub for sleep and motor control in the substantia nigra
Author: Danqian Liu, Weifu Li, Chenyan Ma, Weitong Zheng, Yuanyuan Yao, Chak Foon Tso, Peng Zhong, Xi Chen, Jun Ho Song, Woochul Choi, Se-Bum Paik, Hua Han, Yang Dan
Issue&Volume: 2020/01/24
Abstract: The arousal state of the brain covaries with the motor state of the animal. How these state changes are coordinated remains unclear. We discovered that sleep–wake brain states and motor behaviors are coregulated by shared neurons in the substantia nigra pars reticulata (SNr). Analysis of mouse home-cage behavior identified four states with different levels of brain arousal and motor activity: locomotion, nonlocomotor movement, quiet wakefulness, and sleep; transitions occurred not randomly but primarily between neighboring states. The glutamic acid decarboxylase 2 but not the parvalbumin subset of SNr γ-aminobutyric acid (GABA)–releasing (GABAergic) neurons was preferentially active in states of low motor activity and arousal. Their activation or inactivation biased the direction of natural behavioral transitions and promoted or suppressed sleep, respectively. These GABAergic neurons integrate wide-ranging inputs and innervate multiple arousal-promoting and motor-control circuits through extensive collateral projections.
DOI: 10.1126/science.aaz0956
Source: https://science.sciencemag.org/content/367/6476/440
Science:《科學》,創刊於1880年。隸屬於美國科學促進會,最新IF:41.037