シナプス型は,マウスの脳における地域的血液動力学と空間的に関連しています
Justine Y Hansen1, Andrea I Luppi1,2, Zhen Qiu3,4
1Montréal Neurological Institute, McGill University, Montréal, Quebec, Canada.
PLoS biology
|February 12, 2026
まとめ
マウスの脳におけるマイクロスケールのシナプスタイプは,大規模な脳動力学に影響を与えます. シナプスの分布を機能的磁気共鳴画像 (fMRI) データにマッピングすることで,シナプスの多様性が神経回路の活動と行動をどのように形作るか明らかになります.
科学分野:
- 神経科学は神経科学である.
- 計算神経科学とは
- システム神経科学 システム神経科学
背景:
- シナプスは神経回路の機能に不可欠であり,知覚,認知,行動をサポートします.
- シナプスマッピングの進歩により,シナプス多様性と微分発現の研究が可能になりました.
- シナプスの多様性と脳全体のダイナミクスとの関係を理解することは不可欠です.
研究 の 目的:
- 多様なシナプス型の空間的なマッピングが全脳動態にどのようにマッピングされているかを調査する.
- 複数のシナプス型に関連した包括的なダイナミック現象型を理解する.
- シナプス組織と脳ネットワークの性質の間のつながりを探求する.
主な方法:
- 複数のシナプスタイプの空間分布はマウスでマッピングされました.
- 覚醒したマウスの機能的磁気共鳴画像 (fMRI) 記録から6,000以上のタイムシリーズの特徴を分析した.
- 麻酔を受けたマウスからのfMRIデータセットは,シナプスタンパク質の寿命を評価するために使用されました.
主要な成果:
- 特定のシナプスタイプは,高振幅イベントと信号静止性を含む明確な血液動力学的特徴と関連していました.
- シナプス型とダイナミクスの変動は,脳の領域の構造的および機能的なネットワーク埋め込みと相関しています.
- シナプスタンパク質の寿命は,行動状態の間で異なるシナプス関わりを示した.
結論:
- マイクロスケールのシナプスタイプの空間的組織は,マクロスケールの全脳ダイナミクスを著しく形作る可能性があります.
- この研究は,シナプス構造と脳機能の関係についての洞察を提供します.
- 研究結果は,シナプス多様性と神経回路の動的活動パターンとの関連性を示唆しています.
関連する概念動画
02:47The Synapse
133.7K
Neurons communicate with one another by passing on their electrical signals to other neurons. A synapse is the location where two neurons meet to exchange signals. At the synapse, the neuron that sends the signal is called the presynaptic cell, while the neuron that receives the message is called the postsynaptic cell. Note that most neurons can be both presynaptic and postsynaptic, as they both transmit and receive information.
133.7K
01:20Anatomy of the Brain: Major Regions
10.8K
The brain is the most complex organ in the human body. It consists of four main parts: the cerebrum, diencephalon, cerebellum, and brainstem.
The cerebrum is the largest section of the brain and divides into left and right hemispheres, separated by a deep fissure. The cerebral outer layer of grey matter — the cerebral cortex — comprises elevations called gyri and shallow groves called sulci. The inner portion of white matter includes long nerve fibers known as axons, which connect...
The cerebrum is the largest section of the brain and divides into left and right hemispheres, separated by a deep fissure. The cerebral outer layer of grey matter — the cerebral cortex — comprises elevations called gyri and shallow groves called sulci. The inner portion of white matter includes long nerve fibers known as axons, which connect...
10.8K
01:28Electrical Synapses
11.0K
Electrical synapses found in all nervous systems play important and unique roles. In these synapses, the presynaptic and postsynaptic membranes are very close together (3.5 nm) and are actually physically connected by channel proteins forming gap junctions.
Gap junctions allow the current to pass directly from one cell to the next. In contrast, in the chemical synapse, the neurotransmitters carry the information through the synaptic cleft from one neuron to the next. They consist of two...
Gap junctions allow the current to pass directly from one cell to the next. In contrast, in the chemical synapse, the neurotransmitters carry the information through the synaptic cleft from one neuron to the next. They consist of two...
11.0K
01:26Chemical Synapses
11.9K
Chemical synapses are specialized sites between two neurons or between a neuron and a non-neuronal cell like a muscle, glandular or sensory cell.
Because chemical synapses depend on the release of neurotransmitter molecules from synaptic vesicles to pass on their signal, there is an approximately one millisecond delay between when the axon potential reaches the presynaptic terminal and when the neurotransmitter leads to opening of postsynaptic ion channels. Additionally, this signaling is...
Because chemical synapses depend on the release of neurotransmitter molecules from synaptic vesicles to pass on their signal, there is an approximately one millisecond delay between when the axon potential reaches the presynaptic terminal and when the neurotransmitter leads to opening of postsynaptic ion channels. Additionally, this signaling is...
11.9K
01:26Chemical Synapses
4.6K
Chemical synapses are specialized sites between two neurons or between a neuron and a non-neuronal cell like a muscle, glandular or sensory cell.
Because chemical synapses depend on the release of neurotransmitter molecules from synaptic vesicles to pass on their signal, there is an approximately one millisecond delay between when the axon potential reaches the presynaptic terminal and when the neurotransmitter leads to opening of postsynaptic ion channels. Additionally, this signaling is...
Because chemical synapses depend on the release of neurotransmitter molecules from synaptic vesicles to pass on their signal, there is an approximately one millisecond delay between when the axon potential reaches the presynaptic terminal and when the neurotransmitter leads to opening of postsynaptic ion channels. Additionally, this signaling is...
4.6K
01:03IR Frequency Region: Fingerprint Region
2.0K
IR spectra are divided into two main regions: the diagnostic region and the fingerprint region. The diagnostic region of the spectrum lies above 1500 cm−1. The absorptions resulting from single-bond vibrations of the N–H, C–H, and O–H stretch at higher wavenumbers and appear on the left side of the spectrum. The stretching absorptions of the C≡C and C≡N occur between 2100–2300 cm−1. In contrast, those arising from stretching absorptions of the...
2.0K