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関連する概念動画

Thermosensation01:43

Thermosensation

Peripheral thermosensation is the perception of external temperature. A change in temperature (on the surface of the skin and other tissues) is detected by a family of temperature-sensitive ion channels called Transient Receptor Potential, or TRP, receptors. These receptors are located on free nerve endings. Those detecting cold temperatures are closer to the surface of the skin than the nerve endings detecting warmth. These thermoTRP channels, while temperature selective, have relatively...
Body Temperature01:25

Body Temperature

The body's temperature, measured in degrees, is determined by the balance between heat production and dissipation to the surrounding environment. For instance, if exercising vigorously, the body will produce more heat, causing sweat and dissipating that heat. Despite extreme environmental conditions and physical exertion, the human temperature-control system maintains a constant core body temperature (the temperature of deep tissues, which are the tissues located beneath the skin and other...
Assessing Body Temperature - Temporal Artery01:19

Assessing Body Temperature - Temporal Artery

Here is a stepwise guide to assessing the body temperature at the temporal artery using a temporal artery thermometer
Step 1: Perform hand hygiene and don a fresh pair of gloves to prevent cross-infection and ensure patient safety.
Step 2: Explain the procedure to the patient to establish trust. Clear communication establishes trust with the patient, ensures they understand what to expect, promotes cooperation, and enhances comfort during the procedure.  
Step 3: Assess the patient's forehead...
Functional Brain Systems: Reticular Formation01:13

Functional Brain Systems: Reticular Formation

The reticular formation is a complex network of gray and white matter located within the brainstem extending from the medulla to the midbrain.
Within the reticular formation, there are several distinct nuclei that can be classified into three broad categories. The Raphe nuclei are located along the midline of the brainstem. They are primarily known for their role in synthesizing and releasing serotonin, a neurotransmitter involved in regulating mood, appetite, sleep, and circadian rhythms. The...
Body Temperature01:07

Body Temperature

Body temperature reflects the equilibrium between heat production and heat loss within the body. Most heat is generated by metabolically active tissues, particularly the liver, heart, brain, kidneys, and endocrine organs. At rest, skeletal muscles contribute 20–30% of total heat production, but during vigorous exercise, this can increase up to 30–40 times.
The average body temperature is approximately 37°C (98.6°F) and typically ranges from 36.1–37.2°C (97–99°F), remaining relatively stable...
Brain Imaging01:14

Brain Imaging

Brain imaging technologies provide critical insights into both the structure and function of the human brain, enabling medical professionals and researchers to diagnose, study, and treat neurological disorders or psychiatric disorders more effectively.
These technologies include computerized axial tomography (CAT or CT scans), positron-emission tomography (PET scans),  magnetic resonance imaging (MRI),  functional magnetic resonance imaging (fMRI), and Transcranial Magnetic Stimulation (TMS).

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関連する実験動画

Updated: Jun 25, 2026

A Simple One-step Dissection Protocol for Whole-mount Preparation of Adult Drosophila Brains
09:53

A Simple One-step Dissection Protocol for Whole-mount Preparation of Adult Drosophila Brains

Published on: December 1, 2016

30.2K

ドロソフィラの脳における温度表現.

Dominic D Frank1, Genevieve C Jouandet1, Patrick J Kearney1

  • 1Department of Neurobiology, Northwestern University, Evanston, Illinois 60208, USA.

Nature
|March 6, 2015
PubMed
まとめ

フルーツ・フライ (Drosophila) は,シンプルな脳マップを使って温度情報を処理します. この研究は,熱と寒さに対する多様な神経反応が,迅速な回避を含む複雑な行動を可能にする方法を明らかにしています.

科学分野:

  • 神経科学は神経科学である.
  • 感覚生物学 感覚生物学について
  • 動物の行動 動物の行動

背景:

  • ドロソフィラは温度変化を周辺的に感知し,脳の基本的な感覚マップを作成します.
  • ハエは温度に対する複雑な反応を示し,単純な入力から複雑な情報処理を示唆しています.

研究 の 目的:

  • ドロソフィラの脳における温度表現の解剖学的および生理学的基礎を定義する.
  • 熱情報を処理する神経経路と細胞タイプを特定する.

主な方法:

  • 熱感覚の周辺部からより高い脳中心部へのニューラル接続を追跡するためのフォトラベル技術.
  • 熱刺激に反応する神経活動の記録のためのインビボカルシウムイメージング.
  • 特定のニューロンの役割を評価するための行動分析 (温度偏好の2つの選択)

主要な成果:

  • 熱感知情報は,キノコの体,側角,後方側原脳という3つの脳領域に収束する.
  • 熱感投影ニューロンの異なる集団が特定されました:迅速に適応する (急速な変化を追跡する) とゆっくり適応する (反射する大きさ).
  • 暖房と冷却の両方に反応する広範囲に調整されたニューロンの集団は,回避行動に不可欠です.

さらに関連する動画

A Temperature Gradient Assay to Determine Thermal Preferences of Drosophila Larvae
08:59

A Temperature Gradient Assay to Determine Thermal Preferences of Drosophila Larvae

Published on: June 25, 2018

8.3K
An Automated Method to Determine the Performance of Drosophila in Response to Temperature Changes in Space and Time
06:52

An Automated Method to Determine the Performance of Drosophila in Response to Temperature Changes in Space and Time

Published on: October 12, 2018

6.9K

関連する実験動画

Last Updated: Jun 25, 2026

A Simple One-step Dissection Protocol for Whole-mount Preparation of Adult Drosophila Brains
09:53

A Simple One-step Dissection Protocol for Whole-mount Preparation of Adult Drosophila Brains

Published on: December 1, 2016

30.2K
A Temperature Gradient Assay to Determine Thermal Preferences of Drosophila Larvae
08:59

A Temperature Gradient Assay to Determine Thermal Preferences of Drosophila Larvae

Published on: June 25, 2018

8.3K
An Automated Method to Determine the Performance of Drosophila in Response to Temperature Changes in Space and Time
06:52

An Automated Method to Determine the Performance of Drosophila in Response to Temperature Changes in Space and Time

Published on: October 12, 2018

6.9K

結論:

  • ドロソフィラの脳における温度表現と処理の基礎となるのは,協調された神経集合体である.
  • 広く調節された熱ニューロンは,迅速な回避反応において重要な役割を果たします.
  • この研究は,刺激の質,時間動態,および強度が,単純な感覚マップからどのように暗号化されているかを示しています.