シグナル処理装置は,シナプス後密度のシグナル処理装置である
1Division of Biology, California Institute of Technology, Pasadena, CA 91125, USA. kennedym@its.caltech.edu
まとめ
刺激性シナプスのタンパク質マシンであるポストシナプス密度は,ニューラル活動の反応としてシナプスの強さを調節することによって情報を処理し,記憶を形成します.
科学分野:
- 神経科学は神経科学である.
- 細胞生物学 細胞生物学
- 分子生物学は分子生物学である.
背景:
- ニューロンは何千ものシナプス端末を通して環境情報を受け取り, dendrites に接触します.
- ポストシナプス膜は,それぞれのシナプスにおける情報処理の初期部位である.
- 興奮性シナプスは,シナプス伝達力を調節するポストシナプス密度 (PSD) と呼ばれる大きなタンパク質複合体を特徴としています.
研究 の 目的:
- 神経情報処理におけるポストシナプス密度の役割を明らかにする.
- ポストシナプス密度がシナプス可塑性や記憶形成にどのように影響するかを理解する.
主な方法:
- 電子顕微鏡を使用して,ポストシナプス密度を視覚化しました.
- 研究は,PSDの分子組成と機能に焦点を当てた.
主要な成果:
- ポストシナプス密度は,刺激性ポストシナプス膜の大きな,目に見えるタンパク質マシンです.
- PSDはシナプス伝送力を動的に調節する.
結論:
- ポストシナプス密度は,中枢神経系内の情報処理において重要な役割を果たします.
- シナプスの強さをポストシナプス密度によって調節することは,学習と記憶の基本です.
関連する概念動画
Synaptic Signaling
Neurons communicate at synapses, or junctions, to excite or inhibit the activity of other neurons or target cells, such as muscles. Synapses may be chemical or electrical.
The Synapse
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.
Synaptic Signaling
Neurons communicate at synapses, or junctions, to excite or inhibit the activity of other neurons or target cells, such as muscles. Synapses may be chemical or electrical.
Most synapses are chemical, meaning an electrical impulse or action potential spurs the release of chemical messengers called neurotransmitters. The neuron sending the signal is called the presynaptic neuron, and the neuron receiving the signal is the postsynaptic neuron.
The presynaptic neuron fires an action potential that...
Most synapses are chemical, meaning an electrical impulse or action potential spurs the release of chemical messengers called neurotransmitters. The neuron sending the signal is called the presynaptic neuron, and the neuron receiving the signal is the postsynaptic neuron.
The presynaptic neuron fires an action potential that...
Chemical Synapses
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...
Chemical Synapses
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...
Postsynaptic Potential (PSP)
Postsynaptic potential (PSP) refers to a change in the electrical potential of a neuron when neurotransmitters released by presynaptic neurons bind to postsynaptic receptors. This potential can either be excitatory, leading to depolarization and ultimately action potential generation, or inhibitory, leading to hyperpolarization and suppression of the postsynaptic neuron.
There are two types of receptors: ionotropic and metabotropic.
The ionotropic receptor is the membrane protein that has an...
There are two types of receptors: ionotropic and metabotropic.
The ionotropic receptor is the membrane protein that has an...


