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Olfaction01:25

Olfaction

44.4K
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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Functional Brain Systems: Limbic System01:15

Functional Brain Systems: Limbic System

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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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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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Neurotransmitters01:31

Neurotransmitters

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Neurotransmitters are essential chemical messengers within the nervous system, facilitating the communication between neurons. These chemical messengers, varying in function and effect, are critical for sustaining various aspects of neurological health and emotional well-being.
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Updated: Jul 17, 2025

Combined Mechanical and Enzymatic Dissociation of Mouse Brain Hippocampal Tissue
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ヒトのヒポカンプス内の酸素補給子ネットワーク

Daniel A N Barbosa1, Sandra Gattas2, Juliana S Salgado3

  • 1Department of Neurosurgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA.

Nature
|August 30, 2023
PubMed
まとめ

研究者達は 食欲のコントロールに関与する 側頭下部と海馬を結びつける 人間の脳の回路を特定しました この神経経路は 肥満や摂食障害に 関与しています

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科学分野:

  • 神経科学
  • 人間の生理学
  • 食欲の調節

背景:

  • ネズミの海馬はオルキシゲン (食欲を刺激する) 処理に関与している.
  • メラニン濃縮ホルモンのような神経ペプチドを含む側部下垂体インプットは,この機能を媒介すると考えられています.
  • 特定の人間の神経回路は ほとんど特徴づけられていません

研究 の 目的:

  • 側視床と海馬を含む酸素神経回路を特定し,特徴づけること.
  • この回路の機能と構造を調査する.
  • 食生活と体重指数との関連を 調べるためだ

主な方法:

  • トラクトグラフィー,頭蓋内電気生理学,皮質下皮質誘発力を組み合わせた多様式アプローチ.
  • 3D ヒストロジーは脳クリア技術を使って
  • 摂食不調のヒト群を分析した

主要な成果:

  • 特定の酸素回路を特定しました 横の視床下部と 背面の海馬の下部に繋がっています
  • 背側海馬に特有の甘い脂肪の食物信号による低周波電源の調節が観察されました.
  • 摂食障害のある人の回路の接続性と 体重指数との間には 逆の関係があることが分かりました

結論:

  • ヒトのヒポカンプスの新種の酸素分ネットワークを 記述しています
  • この回路は 食物信号によって機能的に調整され 肥満と構造的に関連しています
  • 食欲不調や食生活障害の 神経的基礎について 洞察を深める