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関連する概念動画

Spontaneity02:21

Spontaneity

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A spontaneous process is one that occurs naturally under certain conditions. A nonspontaneous process, on the other hand, will not take place unless it is “driven” by the continual input of energy from an external source. Processes have a natural tendency to occur in one direction under a given set of conditions. Water will naturally flow downhill (spontaneous process), but uphill flow (nonspontaneous process) requires outside intervention such as the use of a pump. Iron exposed to...
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Energy to Drive Translocation01:37

Energy to Drive Translocation

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Mitochondrial protein import is powered by two distinct energy sources: ATP hydrolysis and electrochemical potential across the inner membrane. Newly synthesized precursors are bound by cytosolic chaperones of the Hsp70 family, which guide them to the import receptors on the mitochondrial surface. Utilizing the energy of ATP hydrolysis, Hsp70 chaperones transfer these precursors to the TOM receptors on the mitochondrial outer membrane.
Generally, polypeptides are unfolded by two distinct...
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M-Cdk Drives Transition Into Mitosis02:15

M-Cdk Drives Transition Into Mitosis

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Checkpoints throughout the cell cycle serve as safeguards and gatekeepers, allowing the cell cycle to progress in favorable conditions and slow or halt it in problematic ones. This regulation is known as the cell cycle control system.
Cyclin-dependent kinases, or Cdks, work in concert with cyclins to control cell cycle transitions. M-Cdk, a complex of Cdk1 bound to M cyclin, is a well-known example of this coordinated control that drives the transition from the G2 to the M phase.
M cyclin...
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Spontaneous and Induced Mutations01:30

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Spontaneous mutations arise infrequently during DNA replication due to errors in the process. A key factor behind these errors is tautomeric shifts in nitrogenous bases, where bases transition from keto to enol forms or amino to imino forms. This shift can alter base-pairing rules, leading to mutations. Additionally, reactive oxygen species (ROS) arising from aerobic metabolism can damage DNA, resulting in depurination (loss of a purine base) or depyrimidination (loss of a pyrimidine base).
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What is Behavior?00:54

What is Behavior?

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Behaviors are actions that an organism engages in—they can be related to finding food, reproducing, defending against threats, and many other possible actions. Behaviors include activities related to the environment around the animal—such as migration—as well as social interactions within a species or population. Many behaviors involve motor output—that is, muscle movements—while others involve less visible actions, such as learning.
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Drive-Reduction Theory: Push Theory of Motivation01:27

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Clark Hull's drive-reduction theory, introduced in the 1940s and 1950s and often termed the "push theory" of motivation, provides a framework for understanding how biological and learned drives influence behavior. Hull suggested that motivation originates from the need to alleviate physiological tension caused by unmet biological necessities. The theory proposes that when a basic need, such as hunger or sleep, goes unfulfilled, it creates an internal imbalance. This imbalance, or...
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Updated: Jan 26, 2026

Driving Under the Influence: How Music Listening Affects Driving Behaviors
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自発的な行動が 脳の多次元的な活動を誘発します

Carsen Stringer1,2, Marius Pachitariu1,3, Nicholas Steinmetz4

  • 1HHMI Janelia Research Campus, Ashburn, VA 20147, USA. stringerc@janelia.hhmi.org pachitarium@janelia.hhmi.org kenneth.harris@ucl.ac.uk.

Science (New York, N.Y.)
|April 20, 2019
PubMed
まとめ

視覚野の自発的な脳活動は 複雑な行動状態をコードし 感覚情報を統合します この神経集団の活動は 外部刺激と内部の多次元的行動データを 確実に結合します

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Driving Simulation in the Clinic: Testing Visual Exploratory Behavior in Daily Life Activities in Patients with Visual Field Defects
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Determination of the Spontaneous Locomotor Activity in Drosophila melanogaster
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Determination of the Spontaneous Locomotor Activity in Drosophila melanogaster

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Driving Simulation in the Clinic: Testing Visual Exploratory Behavior in Daily Life Activities in Patients with Visual Field Defects
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科学分野:

  • 神経科学
  • 計算神経科学
  • システム神経科学

背景:

  • 感覚皮質のニューロン集団は,刺激に対して変化する反応を示し,複雑な自発的な活動を示す.
  • 皮質の変動性と自発的な活動の機能的な役割は,ランダムなノイズ,記憶リコール,または行動/認知状態のエンコーディングを含む仮説で議論されています.

研究 の 目的:

  • ネズミの視覚野における自発的な活動の性質と機能を調査する.
  • 動物の継続的な行動と感覚の入力に関する情報をコードするかどうかを判断する.

主な方法:

  • マウスの視覚皮質の1万以上のニューロンの 活動を記録しました
  • 自発的および刺激によって誘発された状態における神経集団の活動を分析した.
  • 神経活動から潜伏した行動状態を 解読するために,次元縮小技術を活用した.

主要な成果:

  • マウスの継続的な行動に関連した 高次元の潜伏状態を 信頼性のある方法でコードした.
  • 視覚野に限らず 前頭脳に広がっていました
  • 継続的な自発的な活動信号を妨害することなく追加しました.

結論:

  • 視覚皮質の集団活動は 明らかに変化しているにもかかわらず 複雑な行動情報を 堅牢にコードします
  • 神経活動は 感覚情報と多次元的行動状態の 正交的融合を表しています
  • 内的な状態を表現し,外的な感覚データと統合する上で,自発的な神経活動は重要な役割を果たします.