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関連する概念動画

Olfaction01:25

Olfaction

45.7K
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...
45.7K
Physiology of Smell and Olfactory Pathway01:20

Physiology of Smell and Olfactory Pathway

10.0K
Humans detect odors with the help of specialized cells located in the upper part of the nasal cavity, called olfactory receptor neurons (ORNs). ORNs possess hair-like structures called cilia, which are receptive to sensations from the inhaled air. When an odorant molecule binds to a specific receptor on the cell of the cilia, it leads to a series of events that ultimately cause the ORN to send electrical signals to the olfactory bulb in the brain through the olfactory nerves.
The olfactory...
10.0K
Olfactory Receptors: Location and Structure01:03

Olfactory Receptors: Location and Structure

9.8K
The process of olfaction, also known as the sense of smell, is a sophisticated chemical response system. The specialized sensory neurons that facilitate this process, known as olfactory receptor neurons, are situated in an upper segment of the nasal cavity, known as the olfactory epithelium. Olfactory sensory neurons are bipolar, with their dendrites extending from the epithelium's apex into the mucus that lines the nasal cavity. Airborne molecules, when inhaled, traverse the olfactory...
9.8K
Motor and Sensory Areas of the Cortex01:14

Motor and Sensory Areas of the Cortex

5.1K
The cerebral cortex, the brain's outermost layer, is pivotal in processing complex cognitive tasks, emotions, and various sensory inputs and executing voluntary motor activities. This intricate structure is divided into three primary functional areas: the motor areas, sensory areas, and association areas.
Motor Areas
The motor areas located in the frontal lobe are central to controlling voluntary movements. This region is further subdivided into the primary motor cortex and the premotor cortex....
5.1K
Association Areas of the Cortex01:21

Association Areas of the Cortex

6.8K
Association areas are regions of the cerebral cortex that do not have a specific sensory or motor function. Instead, they integrate and interpret information from various sources to enable higher cognitive processes such as memory, learning, and decision-making. Some key association areas include the following:
Prefrontal Association Area: This area is located in the frontal lobe and is involved in planning, decision-making, and moderating social behavior. It connects with primary motor areas,...
6.8K
Somatosensory, Motor, and Association Cortex01:24

Somatosensory, Motor, and Association Cortex

1.2K
The somatosensory cortex in the parietal lobes is crucial for interpreting sensory data such as touch, temperature, and proprioception. The somatosensory cortex, situated in the parietal lobes, plays a vital role in interpreting sensory information like touch, temperature, and proprioception—awareness of body position. This specialized brain region features an organized structure wherein neurons at the top primarily process sensations originating from the lower body. In contrast, those at...
1.2K

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Updated: Oct 9, 2025

Imaging Odor-Evoked Activities in the Mouse Olfactory Bulb using Optical Reflectance and Autofluorescence Signals
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Imaging Odor-Evoked Activities in the Mouse Olfactory Bulb using Optical Reflectance and Autofluorescence Signals

Published on: October 31, 2011

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嗅覚ナビゲーション中のピリフォームド皮質の空間図

Cindy Poo1, Gautam Agarwal2, Niccolò Bonacchi3

  • 1Champalimaud Foundation, Lisbon, Portugal. cindy.poo@neuro.fchampalimaud.org.

Nature
|December 23, 2021
PubMed
まとめ
この要約は機械生成です。

嗅覚に不可欠な皮質は 空間的な地図も作ります この脳の領域のニューロンは 匂いのアイデンティティと 場所の両方を表現し 航海を導くために 匂いの場所の地図を形成します

さらに関連する動画

A Lateralized Odor Learning Model in Neonatal Rats for Dissecting Neural Circuitry Underpinning Memory Formation
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Using MazeSuite and Functional Near Infrared Spectroscopy to Study Learning in Spatial Navigation
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Using MazeSuite and Functional Near Infrared Spectroscopy to Study Learning in Spatial Navigation

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関連する実験動画

Last Updated: Oct 9, 2025

Imaging Odor-Evoked Activities in the Mouse Olfactory Bulb using Optical Reflectance and Autofluorescence Signals
08:30

Imaging Odor-Evoked Activities in the Mouse Olfactory Bulb using Optical Reflectance and Autofluorescence Signals

Published on: October 31, 2011

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A Lateralized Odor Learning Model in Neonatal Rats for Dissecting Neural Circuitry Underpinning Memory Formation
10:42

A Lateralized Odor Learning Model in Neonatal Rats for Dissecting Neural Circuitry Underpinning Memory Formation

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Using MazeSuite and Functional Near Infrared Spectroscopy to Study Learning in Spatial Navigation
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Using MazeSuite and Functional Near Infrared Spectroscopy to Study Learning in Spatial Navigation

Published on: October 8, 2011

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科学分野:

  • 神経科学
  • 嗅覚系
  • 空間的認知

背景:

  • 主要な嗅覚皮質 (piriform cortex) は,伝統的に匂いのアイデンティティをコードする主要な脳領域と考えられています.
  • 動物は匂いを用いて 餌を探したり 航海したりします

研究 の 目的:

  • 空間表現とナビゲーションにおける 後部皮質の役割を調査する.
  • 嗅覚シグナルに基づく 認知マップの形成にピリフォームド皮質ニューロンが 貢献するかどうかを判断する

主な方法:

  • 嗅覚誘導された空間選択のタスク中に自由に動くラットで神経アンサンブル記録が行われました.
  • 分析は空間的表現,文脈間の安定性,そしてヒポカンパスのセータリズムとの機能的結合に焦点を当てた.

主要な成果:

  • 後部皮質の神経細胞は 学習された認知マップを形成し 堅固な空間的表現を示します
  • これらの空間的表現は 匂いポートの近くで最も強く 嗅覚駆動や報酬とは独立しています
  • ピリフォームニューロン集合は 匂いのアイデンティティと空間位置を同時にコードし 匂いの場所のマップを作成します

結論:

  • ピリフォームド皮質は 空間認識において重要な役割を果たし 匂いの識別を超えています
  • この脳の領域は 匂いと場所の関連を 形成するのに適しています
  • ピリフォームド皮質が 嗅覚による空間的ナビゲーションを 活発に導いていることが 示唆されています