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関連する概念動画

Olfaction01:25

Olfaction

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...
Somatosensation01:33

Somatosensation

The somatosensory system relays sensory information from the skin, mucous membranes, limbs, and joints. Somatosensation is more familiarly known as the sense of touch. A typical somatosensory pathway includes three types of long neurons: primary, secondary, and tertiary. Primary neurons have cell bodies located near the spinal cord in groups of neurons called dorsal root ganglia. The sensory neurons of ganglia innervate designated areas of skin called dermatomes.
Sensory Functions of the Skin01:16

Sensory Functions of the Skin

The skin is the largest organ of the human body and plays a crucial role in our sensory perception. It contains a vast network of sensory receptors that contribute to the skin's protective function by perceiving physical, biological, and environmental cues and generating relevant responses.
There are two main categories of receptors on the skin: capsulated and non-capsulated. The non-capsulated ones are mainly the pain receptors. The capsulated ones can be further categorized based on the...
Introduction to Special Senses01:26

Introduction to Special Senses

Sensory receptors play an integral part in comprehending our external and internal environments. They receive diverse stimuli, converting them into the nervous system's electrochemical signals. This conversion occurs as the stimulus alters the sensory neuron's cell membrane potential, instigating the generation of an action potential. This action potential is subsequently transmitted to the central nervous system (CNS), which integrates with other sensory data or higher cognitive functions.
Physiology of Smell and Olfactory Pathway01:20

Physiology of Smell and Olfactory Pathway

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...
Tactile and Chemical Senses01:27

Tactile and Chemical Senses

Tactile senses encompass touch, temperature, and pain, each mediated by specific receptors. Touch receptors detect mechanical energy or pressure against the skin. Sensory fibers from these receptors enter the spinal cord and relay information to the brain stem. Here, most fibers cross over to the opposite side of the brain. The touch information then moves to the thalamus, which projects a map of the body's surface onto the somatosensory areas of the parietal lobes in the cerebral cortex. This...

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関連する実験動画

Updated: Jul 7, 2026

Flat Mount Imaging of Mouse Skin and Its Application to the Analysis of Hair Follicle Patterning and Sensory Axon Morphology
13:58

Flat Mount Imaging of Mouse Skin and Its Application to the Analysis of Hair Follicle Patterning and Sensory Axon Morphology

Published on: June 25, 2014

人間の嗅覚皮質の機能的局所化と横向化.

R J Zatorre1, M Jones-Gotman, A C Evans

  • 1McConnell Brain Imaging Centre, Montreal Neurological Institute, Quebec, Canada.

Nature
|November 26, 1992
PubMed
まとめ
この要約は機械生成です。

この研究では,脳のイメージングを使用して,人間の嗅覚処理をマッピングしました. 発見は,ピリフォームム皮質と右軌道前頭皮質が重要な領域であることを明らかにし,嗅覚における右脳半球の専門的な役割を示唆しています.

さらに関連する動画

Visualization of Cortical Modules in Flattened Mammalian Cortices
08:49

Visualization of Cortical Modules in Flattened Mammalian Cortices

Published on: January 22, 2018

Intravital Two-Photon Imaging of Touch Sensory Axon Morphology in Mouse Skin
07:51

Intravital Two-Photon Imaging of Touch Sensory Axon Morphology in Mouse Skin

Published on: December 30, 2025

関連する実験動画

Last Updated: Jul 7, 2026

Flat Mount Imaging of Mouse Skin and Its Application to the Analysis of Hair Follicle Patterning and Sensory Axon Morphology
13:58

Flat Mount Imaging of Mouse Skin and Its Application to the Analysis of Hair Follicle Patterning and Sensory Axon Morphology

Published on: June 25, 2014

Visualization of Cortical Modules in Flattened Mammalian Cortices
08:49

Visualization of Cortical Modules in Flattened Mammalian Cortices

Published on: January 22, 2018

Intravital Two-Photon Imaging of Touch Sensory Axon Morphology in Mouse Skin
07:51

Intravital Two-Photon Imaging of Touch Sensory Axon Morphology in Mouse Skin

Published on: December 30, 2025

科学分野:

  • 神経科学は神経科学である.
  • 嗅覚系の研究 嗅覚系の研究
  • 脳イメージングの研究は,脳イメージングの研究です.

背景:

  • 動物の研究では,嗅覚のための複数の皮質領域が特定されていますが,ヒトの嗅覚領域には明確な機能的識別がありません.
  • 行動データは,横向的な匂いの処理を示唆しますが,その基礎となる神経解剖学は不明です.

研究 の 目的:

  • 嗅覚処理に関与するヒトの皮質領域を機能的に特定する.
  • ヒトの嗅覚系における潜在的側面化を調査する.

主な方法:

  • ポジトロン放出トモグラフィー (PET) を用いて,脳の血流量を測定した.
  • 嗅覚刺激は,活性化された脳領域を特定するためのコントロールタスクと比較した.

主要な成果:

  • 脳の血流の有意な増加は,下部前頭葉と側頭葉の交差点 (ピリフォームド皮質) で双方向的に観察されました.
  • 脳の血流の一方的な増加は,右側軌道前頭皮質で発見されました.
  • これらの発見は,嗅覚のための軌道前頭皮質の右半球の優位性を持つ機能的非対称性を示している.

結論:

  • ピリフォームド皮質と右軌道前皮質は,人間の嗅覚の重要な機能領域です.
  • 証拠は,人間の脳における機能的非対称性を支持し,嗅覚処理において右側オービトフロントアル皮質を好む.