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関連する概念動画

Piecewise-Defined Functions01:28

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Piecewise defined functions are mathematical models where different expressions define a function over distinct intervals of the domain. These functions are useful for representing systems with varying behaviors depending on input values.For example, the function:  uses a linear rule for inputs less than or equal to –1 and a quadratic rule for values greater than –1. Although it has two formulas, it still defines a single function.Another common type is the absolute value...
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Rules for Defining Functions01:29

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A relation is a function if each input x is associated with exactly one output y. For example, the equation      y = 2x + 5 defines a function because every value of x yields a unique y. However, x = y² + 1 is not a function of x, since a single x-value, such as x = 2, corresponds to two possible y-values: y = 1 and y = -1.The vertical line test helps determine whether a graph represents a function. If a vertical line intersects a curve more than once, the curve fails...
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The transfer function is a fundamental concept in the analysis and design of linear time-invariant (LTI) systems. It offers a concise way to understand how a system responds to different inputs in the frequency domain. It serves as a bridge between the time-domain differential equations that describe system dynamics and the frequency-domain representation that facilitates easier manipulation and analysis.
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解剖学的に定義され,機能的に区別される脊椎ラフェセロトニンサブシステム

Jing Ren1, Drew Friedmann1, Jing Xiong2

  • 1Department of Biology and Howard Hughes Medical Institute, Stanford University, Stanford, CA 94305, USA.

Cell
|August 28, 2018
PubMed
まとめ
この要約は機械生成です。

背面ラフェ (DR) セロトニンシステムは単一の単位ではありません. 異なるDRニューロン集団が 異なる脳の領域に広がり 不安や対処行動に影響します

キーワード:
5-HT についてTph2 についてVglut3 について心配する中枢桃体うつ病背面ラフェファイバーフォトメトリーiDISCO (アイディスコ)軌道前頭皮質セロトニン

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科学分野:

  • 神経科学
  • 神経生物学
  • セロトニン系

背景:

  • 背中のラフェ (DR) は前脳のセロトニンの主要な源です.
  • 気分や不安 運動機能に影響します
  • 以前の研究では,DRセロトニンニューロンを均一な集団として扱った.

研究 の 目的:

  • DRセロトニンニューロンの機能的異質性を調査する.
  • 下皮質と皮質に発射するDRセロトニンニューロン集団を区別する.

主な方法:

  • ウイルスの遺伝子追跡技術が採用された.
  • 膀性グルタミン酸トランスポーターの共表現の分析
  • 全脳裏付けのマッピング
  • プレシナプス入力に関する調査
  • 機能の獲得と喪失の実験

主要な成果:

  • 下皮質と皮質を投射するDRセロトニンニューロンは,異なる分布と共表現パターンを示しています.
  • アミグダラと前頭皮質を投影するニューロンは 互いを補完する接続性と 偏った入力を示します
  • これらの異なる集団は 嫌悪的な刺激に対して 逆の反応をする.
  • アミグダラ発射ニューロンは不安を促し 前頭皮質発射ニューロンは 積極的な対処を促します

結論:

  • DRセロトニンシステムは,平行で機能的に異なるサブシステムで構成されています.
  • これらのサブシステムは,接続性,応答特性,および行動的役割によって異なります.
  • この発見は セロトニンが脳機能と行動に 果たす役割についての理解を 洗練しています