在CA1中的位置单元缺乏火点位置的地形组织
Torstein Slettmoen1, Nienke L de Jong1, Hanna Eneqvist1
1Kavli Institute for Systems Neuroscience and Centre for Algorithms in the Cortex, Norwegian University of Science and Technology, Trondheim 7491, Norway.
概括
在小鼠的海马位细胞中,没有表现出地形组织. 空间射击地点与解剖学上的近距离无关,这表明CA1区域的位置的非地形编码.
科学领域:
- 神经科学是一个神经科学.
- 系统神经科学 系统神经科学
- 计算神经科学是一种神经科学.
背景情况:
- 地形绘制是在感觉皮层和运动皮层中建立的.
- 海马,一个更高的协会区域,缺乏明确的地形组织.
- 之前的研究表明,海马位细胞的潜在局部功能集.
研究的目的:
- 为了研究海马位细胞的局部功能聚类的程度.
- 为了确定位置电池发射场是否在CA1地区表现出地形组织.
- 分析解剖近距离与空间射击模式之间的关系.
主要方法:
- 利用双光子成像用于高分辨率记录神经元活动.
- 同时在自由移动的小鼠中记录了近一千个CA1神经元.
- 在开放的竞技场环境中分析了射击场和位置细胞的解剖近距离.
主要成果:
- 没有发现首选的射击位置和位置细胞之间的解剖近距离之间的相关性.
- 最接近的邻居细胞在射击场上没有比遥远的细胞对更大的相似性.
- 环境之间的重新映射没有显示转移的相关性,表明缺乏地形编码.
结论:
- CA1位置单元对位置的编码很可能完全非地形.
- 这些发现挑战了基于解剖近距离的局部功能聚类的概念.
- 海马中的空间信息处理可能依赖于超越地形绘图的机制.
相关概念视频
02:30Histone Variants at the Centromere
4.0K
Histone variants are the histone proteins with structural and sequence variations. These variants may be regarded as “mutant” forms that replace their canonical histone counterparts in the nucleosomes. Specific post-translational modifications on the histone variants enable further chromatin complexity and regulate tissue-specific gene expression. The most common histone variants are from histone H2A, H2B, and linker histone H1 families. However, several variants of histone H3...
4.0K
02:10Additional Subnuclear Structures
4.2K
The eukaryotic nucleus is a double membrane-bound organelle that contains nearly all of the cell’s genetic material in the form of chromosomes. It is rightly called the “brain” of the cell as it shoulders the responsibility of responding to various physiological processes, stress, altered metabolic conditions, and other cellular signals.
The nucleus contains many membrane-less subnuclear organelles or nuclear bodies, such as nucleoli, Cajal bodies, speckles,...
The nucleus contains many membrane-less subnuclear organelles or nuclear bodies, such as nucleoli, Cajal bodies, speckles,...
4.2K