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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

Role of Hippocampus in Memory

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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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Functional Brain Systems: Limbic System01:15

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The limbic system, often called the "emotional brain," is a complex set of structures located deep within the brain. The intricate network of the limbic system supports a wide range of psychological functions, from emotional regulation to memory formation and sensory processing. This functional brain region encompasses specific parts of the diencephalon and the cerebrum, integrating the higher mental functions of the cerebral cortex with the primitive emotional responses of the deep brain...
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相关实验视频

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Combined In Vivo Anatomical and Functional Tracing of Ventral Tegmental Area Glutamate Terminals in the Hippocampus
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河马星球细胞编码奖励位置.

Adi Doron1, Alon Rubin2, Aviya Benmelech-Chovav1

  • 1Edmond and Lily Safra Center for Brain Sciences (ELSC), The Hebrew University of Jerusalem, Jerusalem, Israel.

Nature
|August 31, 2022
PubMed
概括
此摘要是机器生成的。

海马中的星细胞在熟悉的环境中表现出奖励位置特定的活动. 天体细胞的这种体验依赖的空间编码表明它在导航和奖励期望等认知功能中发挥了作用.

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Combined Mechanical and Enzymatic Dissociation of Mouse Brain Hippocampal Tissue
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Immunohistochemical Visualization of Hippocampal Neuron Activity After Spatial Learning in a Mouse Model of Neurodevelopmental Disorders
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科学领域:

  • 神经科学是一个神经科学.
  • 细胞生物学 细胞生物学

背景情况:

  • 星细胞信号传递对于感官编码和行为调制至关重要.
  • 在清醒,表现的小鼠中对海马星细胞活动的纵向研究是有限的.

研究的目的:

  • 在空间导航和奖励寻找期间,实时调查海马体中的天体细胞活动.
  • 要确定星细胞活动是否编码空间信息,并依赖于经验.

主要方法:

  • 慢性双光子显微镜被用来对在虚拟环境中导航的小鼠中的CA1天体细胞进行成像.
  • 小鼠在熟悉或新鲜的环境中跑步,获得水奖励,奖励位置被操纵.
  • 线性解码器分析了天体细胞活动的空间信息内容.

主要成果:

  • 天体细胞在熟悉的环境中向奖励位置表现出持续的升活动,但不是新鲜的环境.
  • 奖励位置的移动扰乱了坡,随着重新熟悉而重新出现.
  • 仅仅天体细胞活动就预测了老鼠在熟悉的环境中的位置,但不是新的环境.

结论:

  • 河马星球细胞以经验依赖的方式编码预期的奖励位置.
  • 这表明星体细胞在空间认知和基于奖励的学习中发挥了作用.
  • 这些发现扩大了已知天体细胞的计算能力和认知功能.