Jove
Visualize
お問い合わせ
JoVE
x logofacebook logolinkedin logoyoutube logo
JoVEについて
概要リーダーシップブログJoVEヘルプセンター
著者向け
出版プロセス編集委員会範囲と方針査読よくある質問投稿
図書館員向け
推薦の声購読アクセスリソース図書館諮問委員会よくある質問
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experimentsアーカイブ
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教員リソースセンター教員サイト
利用規約
プライバシーポリシー
ポリシー

関連する概念動画

Linear time-invariant Systems01:23

Linear time-invariant Systems

876
A system is linear if it displays the characteristics of homogeneity and additivity, together termed the superposition property. This principle is fundamental in all linear systems. Linear time-invariant (LTI) systems include systems with linear elements and constant parameters.
The input-output behavior of an LTI system can be fully defined by its response to an impulsive excitation at its input. Once this impulse response is known, the system's reaction to any other input can be...
876
pH Scale02:41

pH Scale

79.0K
Hydronium and hydroxide ions are present both in pure water and in all aqueous solutions, and their concentrations are inversely proportional as determined by the ion product of water (Kw). The concentrations of these ions in a solution are often critical determinants of the solution’s properties and the chemical behaviors of its other solutes. Two different solutions can differ in their hydronium or hydroxide ion concentrations by a million, billion, or even trillion times. A common means of...
79.0K
Frequency-dependent Selection01:21

Frequency-dependent Selection

23.1K
When the fitness of a trait is influenced by how common it is (i.e., its frequency) relative to different traits within a population, this is referred to as frequency-dependent selection. Frequency-dependent selection may occur between species or within a single species. This type of selection can either be positive—with more common phenotypes having higher fitness—or negative, with rarer phenotypes conferring increased fitness.
23.1K
Problem-Solving: Tuning of a Guitar String01:04

Problem-Solving: Tuning of a Guitar String

970
In the case of stringed instruments like the guitar, the elastic property that determines the speed of the sound produced is its linear mass density or the mass per unit length. This is simply called the linear density. If the string's linear density is constant along the string, then the linear density is simply the total mass divided by the total length.
The string's wave speed can be regulated by varying the linear density. Tension is the other property that determines the speed of...
970
Scaling01:26

Scaling

566
In designing and analyzing filters, resonant circuits, or circuit analysis at large, working with standard element values like 1 ohm, 1 henry, or 1 farad can be convenient before scaling these values to more realistic figures. This approach is widely utilized by not employing realistic element values in numerous examples and problems; it simplifies mastering circuit analysis through convenient component values. The complexity of calculations is thereby reduced, with the understanding that...
566
Association Areas of the Cortex01:21

Association Areas of the Cortex

9.0K
Association areas are regions of the cerebral cortex that do not have a specific sensory or motor function. Instead, they integrate and interpret information from various sources to enable higher cognitive processes such as memory, learning, and decision-making. Some key association areas include the following:
Prefrontal Association Area: This area is located in the frontal lobe and is involved in planning, decision-making, and moderating social behavior. It connects with primary motor areas,...
9.0K

こちらも読む

関連記事

共著者、ジャーナル、引用グラフによってこの研究に関連する記事。

並び替え
Same author

The Population Spatial Frequency Toolbox.

Journal of open research software·2026
Same author

Psychometric Performance of Children With Amblyopia During a Tablet-Based Adaptive Visual Acuity Assessment.

Investigative ophthalmology & visual science·2026
Same author

Cortex-specific inversion of visual responses during sleep.

Nature communications·2026
Same author

Cortex-specific inversion of visual responses during sleep.

bioRxiv : the preprint server for biology·2026
Same author

Dynamic estimation of the attentional field from visual cortical activity.

eLife·2025
Same author

Attention Alters Population Spatial Frequency Tuning.

The Journal of neuroscience : the official journal of the Society for Neuroscience·2025

関連する実験動画

Updated: Jan 21, 2026

Spatial Profiling of Protein and RNA Expression in Tissue: An Approach to Fine-Tune Virtual Microdissection
09:19

Spatial Profiling of Protein and RNA Expression in Tissue: An Approach to Fine-Tune Virtual Microdissection

Published on: July 6, 2022

5.4K

人間の視覚野における空間周波数チューニングはスケール不変性に従う

Emily Wiecek1,2,3, Luis D Ramirez3,4, Michaela Klimova3,5

  • 1Boston Children's Hospital, Boston, Massachusetts 02115 Emily.wiecek@childrens.harvard.edu.

The Journal of neuroscience : the official journal of the Society for Neuroscience
|January 19, 2026
PubMed
まとめ
この要約は機械生成です。

人間の視覚野はスケール不変性を示し、空間周波数選択性は受容野サイズに反比例する。本研究は、モデルベースfMRIを用いた初期ヒト視覚におけるこの原理の最初の直接的証拠を提供する。

キーワード:
スケール不変性空間周波数選択性受容野サイズヒト視覚野fMRI

さらに関連する動画

Visualizing Stromule Frequency with Fluorescence Microscopy
08:27

Visualizing Stromule Frequency with Fluorescence Microscopy

Published on: November 23, 2016

8.5K
Monocular Visual Deprivation and Ocular Dominance Plasticity Measurement in the Mouse Primary Visual Cortex
08:42

Monocular Visual Deprivation and Ocular Dominance Plasticity Measurement in the Mouse Primary Visual Cortex

Published on: February 8, 2020

11.2K

関連する実験動画

Last Updated: Jan 21, 2026

Spatial Profiling of Protein and RNA Expression in Tissue: An Approach to Fine-Tune Virtual Microdissection
09:19

Spatial Profiling of Protein and RNA Expression in Tissue: An Approach to Fine-Tune Virtual Microdissection

Published on: July 6, 2022

5.4K
Visualizing Stromule Frequency with Fluorescence Microscopy
08:27

Visualizing Stromule Frequency with Fluorescence Microscopy

Published on: November 23, 2016

8.5K
Monocular Visual Deprivation and Ocular Dominance Plasticity Measurement in the Mouse Primary Visual Cortex
08:42

Monocular Visual Deprivation and Ocular Dominance Plasticity Measurement in the Mouse Primary Visual Cortex

Published on: February 8, 2020

11.2K

科学分野:

  • 神経科学
  • 視覚神経科学
  • 計算神経科学

背景:

  • 空間スケールにわたるパターンの知覚能力は、ヒトの視覚にとって基本的である。
  • この能力は、初期視覚処理におけるスケール不変受容野に由来すると広く仮定されている。
  • しかし、この仮定はヒトの視覚野では検証されていなかった。

研究 の 目的:

  • ヒト視覚野におけるスケール不変性の仮説を検証する。
  • 初期視覚野における受容野サイズと空間周波数選択性の関係を調査する。
  • ヒト視覚処理におけるスケール不変性の直接的な証拠を提供する。

主な方法:

  • 8人の参加者を用いたモデルベース機能的磁気共鳴画像法（fMRI）を採用した。
  • ボクセル内の皮質亜集団の空間チューニングと空間周波数選択性を特徴付けた。
  • 初期視覚野V1、V2、V3のデータを解析した。

主要な成果:

  • ピーク空間周波数チューニングと受容野サイズ（受容野あたりのサイクル数 - CPF）の比率が、視覚野V1-V3全体で一定であることがわかった。
  • 集団レベルで空間周波数選択性と受容野サイズの逆相関を実証した。
  • この発見は、初期ヒト視覚におけるスケール不変性の原理を支持する。

結論:

  • ヒト視覚野におけるスケール不変性の最初の直接的な証拠を提供する。
  • 空間周波数選択性が初期視覚野全体で受容野サイズと逆スケールすることを確立する。
  • 初期視覚における空間情報サンプリングと表現を理解するための新しいフレームワークを提供する。