Jove
Visualize
联系我们
JoVE
x logofacebook logolinkedin logoyoutube logo
关于 JoVE
概览领导团队博客JoVE 帮助中心
作者
出版流程编辑委员会范围与政策同行评审常见问题投稿
图书馆员
用户评价订阅访问资源图书馆顾问委员会常见问题
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experiments存档
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教师资源中心教师网站
使用条款与条件
隐私政策
政策

相关概念视频

Valence Bond Theory and Hybridized Orbitals02:38

Valence Bond Theory and Hybridized Orbitals

19.0K
According to valence bond theory, a covalent bond results when: (1) an orbital on one atom overlaps an orbital on a second atom, and (2) the single electrons in each orbital combine to form an electron pair. The strength of a covalent bond depends on the extent of overlap of the orbitals involved. Maximum overlap is possible when the orbitals overlap on a direct line between the two nuclei.
A σ bond (single bond in a Lewis structure) is a covalent bond in which the electron density is...
19.0K
Molecular Orbital Theory I02:35

Molecular Orbital Theory I

31.8K
Overview of Molecular Orbital Theory
31.8K
Spin–Spin Coupling: Two-Bond Coupling (Geminal Coupling)01:20

Spin–Spin Coupling: Two-Bond Coupling (Geminal Coupling)

981
Two NMR-active nuclei bonded to a central atom can be involved in geminal or two-bond coupling. Geminal coupling is commonly seen between diastereotopic protons in chiral molecules and unsymmetrical alkenes, among others.
The central atom need not be NMR-active because its electrons are affected by the electron polarization of the spin-active atoms. However, spin information is transmitted less effectively than in one-bond coupling, and 2J values are usually weaker than 1J values. The energy of...
981
Couples: Scalar and Vector Formulation01:21

Couples: Scalar and Vector Formulation

236
One might wonder how the captain of a large ship can navigate through the ocean with just a turn of the steering wheel. The answer lies in the concept of two parallel forces that are equal in magnitude and opposite sense, creating a couple moment.
A couple moment is a rotational force that tends to rotate the steering wheel. The wheel's rotation can either be in a clockwise or anticlockwise direction. The right-hand rule is a helpful method for determining the direction of a couple moment....
236
Molecular Orbital Theory II03:51

Molecular Orbital Theory II

19.0K
Molecular Orbital Energy Diagrams
19.0K
Functional Classification of Joints01:09

Functional Classification of Joints

3.9K
Functional Classification of Joints
The functional classification of joints is determined by the amount of mobility between the adjacent bones. Joints are functionally classified as a synarthrosis or immobile joint, an amphiarthrosis or slightly moveable joint, or as a diarthrosis, a freely moveable joint. Fibrous and cartilaginous joints can be functionally classified as either synarthroses  or amphiarthroses, whereas all synovial joints are classified as diarthroses.
Synarthrosis
An...
3.9K

您也可能阅读

相关文章

通过共同作者、期刊和引用图与本文相关的文章。

排序
Same author

Distinct tasks engage a shared neural subspace in human hippocampus and anterior cingulate cortex.

bioRxiv : the preprint server for biology·2026
Same author

Selective observation following betrayal shapes the social inference landscape.

PLoS computational biology·2026
Same author

Sex-biased computations underlying differential set shift performance in mice.

Neuropsychopharmacology : official publication of the American College of Neuropsychopharmacology·2026
Same author

Accumulation of virtual tokens towards a jackpot reward enhances performance and value encoding in dorsal anterior cingulate cortex.

Nature communications·2026
Same author

Author Correction: Intracranial directed connectivity links subregions of the prefrontal cortex to major depression.

Nature communications·2026
Same author

Evidence accumulation from experience and observation in the cingulate cortex.

Nature·2026

相关实验视频

Updated: Jun 12, 2025

Measuring the Subjective Value of Risky and Ambiguous Options using Experimental Economics and Functional MRI Methods
13:04

Measuring the Subjective Value of Risky and Ambiguous Options using Experimental Economics and Functional MRI Methods

Published on: September 19, 2012

12.1K

价值的半直角子空间调解了一个具有约束力和通用性的权衡.

W Jeffrey Johnston1, Justin M Fine2, Seng Bum Michael Yoo3

  • 1Center for Theoretical Neuroscience and Mortimer B. Zuckerman Mind, Brain, and Behavior Institute, Columbia University, New York, NY, USA. wjeffreyjohnston@gmail.com.

Nature neuroscience
|September 17, 2024
PubMed
概括

大脑绑定提供价值的位置使用不同的神经群体子空间. 这种子空间编码策略有助于解决决策过程中复杂的特征绑定问题.

更多相关视频

Selecting Multiple Biomarker Subsets with Similarly Effective Binary Classification Performances
07:35

Selecting Multiple Biomarker Subsets with Similarly Effective Binary Classification Performances

Published on: October 11, 2018

7.4K
Visualization Method for Proprioceptive Drift on a 2D Plane Using Support Vector Machine
07:05

Visualization Method for Proprioceptive Drift on a 2D Plane Using Support Vector Machine

Published on: October 27, 2016

9.2K

相关实验视频

Last Updated: Jun 12, 2025

Measuring the Subjective Value of Risky and Ambiguous Options using Experimental Economics and Functional MRI Methods
13:04

Measuring the Subjective Value of Risky and Ambiguous Options using Experimental Economics and Functional MRI Methods

Published on: September 19, 2012

12.1K
Selecting Multiple Biomarker Subsets with Similarly Effective Binary Classification Performances
07:35

Selecting Multiple Biomarker Subsets with Similarly Effective Binary Classification Performances

Published on: October 11, 2018

7.4K
Visualization Method for Proprioceptive Drift on a 2D Plane Using Support Vector Machine
07:05

Visualization Method for Proprioceptive Drift on a 2D Plane Using Support Vector Machine

Published on: October 27, 2016

9.2K

科学领域:

  • 神经科学是一个神经科学.
  • 认知神经科学 认知神经科学
  • 决策神经科学 决策神经科学

背景情况:

  • 做出选择需要将选项值与选择动作关联起来,这个过程被称为绑定问题.
  • 大脑如何解决这种绑定问题的基础的神经机制尚未完全理解.

研究的目的:

  • 为了调查神经群体子空间是否被大脑用来解决绑定问题.
  • 确定神经群体在决策过程中如何编码价值和位置信息.

主要方法:

  • 在执行选择任务的子中,监测了五个对奖励敏感的大脑区域的神经活动.
  • 分析了神经群体的活动,以确定如何在不同的子空间中表示报价价值和位置.

主要成果:

  • 奖励敏感区域的神经群体在不同的子空间中编码左和右的报价值,从而促进结合.
  • 在神经子空间中对顺序报价值的正交对角编码也支持绑定.
  • 行为错误与空间相关,但不是时间,神经错误结合.
  • 与中等值相比,极端 (低/高) 报价值的错误增加.

结论:

  • 大脑利用半直角的神经群体子空间将抽象的价值信息与特定特征 (如位置) 结合起来.
  • 这种基于子空间的神经表示提供了一个解决决策中的特征绑定问题的机制.