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相关概念视频

Olfaction01:25

Olfaction

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The sense of smell is achieved through the activities of the olfactory system. It starts when an airborne odorant enters the nasal cavity and reaches olfactory epithelium (OE). The OE is protected by a thin layer of mucus, which also serves the purpose of dissolving more complex compounds into simpler chemical odorants. The size of the OE and the density of sensory neurons varies among species; in humans, the OE is only about 9-10 cm2.
The olfactory receptors are embedded in the cilia of the...
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Role of Hippocampus in Memory01:19

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The hippocampus, a critical brain structure, plays an essential role in memory processing, particularly in the formation and retrieval of memory. This small, seahorse-shaped region is located within the medial temporal lobe, with one hippocampus in each brain hemisphere. Experimental studies involving lesions in the hippocampi of rats have demonstrated significant impairments in tasks such as object recognition and maze navigation, indicating the hippocampus involvement in both recognition and...
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相关实验视频

Updated: Jun 28, 2025

Preparation of Parasagittal Slices for the Investigation of Dorsal-ventral Organization of the Rodent Medial Entorhinal Cortex
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空间编码功能障碍和网络不稳定性在老化中介内腔皮层中.

Charlotte S Herber1,2, Karishma J B Pratt3,4, Jeremy M Shea3,4

  • 1Department of Neurobiology, Stanford University School of Medicine, Stanford, CA, 94305, USA.

bioRxiv : the preprint server for biology
|April 25, 2024
PubMed
概括
此摘要是机器生成的。

衰老会通过破坏神经网络功能的稳定而损害空间记忆,而神经网络的功能是在中枢内腔皮层 (MEC) 中. 空间编码的这种与年龄相关的下降与MEC 内神经元中的基因表达改变有关.

关键词:
衰老的衰老 衰老的衰老网格细胞是一个网格细胞.中间内皮层 (medial entorhinal cortex) 是一个内皮层.空间记忆是一种空间记忆.翻译学 翻译学 翻译学 翻译学

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科学领域:

  • 神经科学是一个神经科学.
  • 衰老研究研究 衰老研究
  • 认知神经科学 认知神经科学

背景情况:

  • 空间记忆对于导航至关重要,在不同物种中随着年龄的增长而下降.
  • 这种下降可能源于海马体和中枢内腔皮层 (MEC) 的变化.
  • 衰老对MEC中细胞和网络级空间编码的确切影响尚不清楚.

研究的目的:

  • 调查老年介质内皮层 (MEC) 中空间编码的完整性.
  • 识别与年龄相关的空间记忆缺陷相关的分子和网络变化.

主要方法:

  • 在年轻,中年和老年小鼠在虚拟环境中使用体内电生理学.
  • 评估了电网电池的发射模式和稳定性.
  • 对老老鼠的MEC组织进行了转录基因分析.

主要成果:

  • 陈旧的电网细胞表现出特定环境空间发射的稳定性受损,与记忆缺陷相关.
  • 陈旧的MEC网络显示出不稳定的点火模式,与环境环境变化的调整差.
  • 在老年MEC中鉴定了458个差异表达的基因,其中61个与空间燃烧稳定性相关,富含内部神经元和突触传输通路.

结论:

  • 衰老破坏了介质内耳皮层中细胞和网络层面的空间编码完整性.
  • 转录基因变化,特别是内部神经元的变化,与衰老中的空间发射稳定性受损和记忆缺陷有关.
  • 这些发现突出了与年龄相关的空间记忆衰退背后的协调的分子,细胞和网络机制.