行动特异性奖励值在条形体中的表示
Kazuyuki Samejima1, Yasumasa Ueda, Kenji Doya
1Department of Computational Neurobiology, ATR Computational Neuroscience Laboratories, 619-0288 Kyoto, Japan. samejima@lab.tamagawa.ac.jp
概括
纹状体中的神经活动代表了潜在行动的价值,有助于决策. 这种基底腺节电路功能对于指导基于估计奖励的行动选择至关重要.
科学领域:
- 神经科学是一个神经科学.
- 决策研究 决策研究
- 计算神经科学是一种神经科学.
背景情况:
- 准确估计行动奖励价值对于有效的决策至关重要.
- 基底,特别是状体,与基于奖励的学习和行动选择有关.
研究的目的:
- 为了研究状神经元在决策过程中代表行动值的作用.
- 了解基底质回路如何利用估计的奖励概率来指导选择.
主要方法:
- 子中条状投射神经元的电生理学记录.
- 子执行了一项任务,需要根据估计的奖励概率在左手柄转向和右手柄转向之间进行选择.
主要成果:
- 记录的三分之一以上的条状神经元在延迟期间表现出对两个可能的动作之一的值有选择性的活动.
- 较少的神经元对相对动作值或最终动作选择本身进行调整.
结论:
- 条形体代表了个别的行动值,为指导行动选择提供了关键信息.
- 这些发现阐明了基底质回路中的一个关键机制,用于基于价值的决策.
相关概念视频
Action Potentials
Overview
Gauss's Law: Planar Symmetry
A planar symmetry of charge density is obtained when charges are uniformly spread over a large flat surface. In planar symmetry, all points in a plane parallel to the plane of charge are identical with respect to the charges. Suppose the plane of the charge distribution is the xy-plane, and the electric field at a space point P with coordinates (x, y, z) is to be determined. Since the charge density is the same at all (x, y) - coordinates in the z = 0 plane, by symmetry, the electric field at P...
Two-Dimensional Force System
A two-dimensional system in mechanical engineering involves the analysis of motion and forces in a plane. A two-dimensional force vector can be resolved into its components as:
Generation of Action Potential in Skeletal Muscles
Every cell in the body maintains a membrane potential due to an uneven distribution of positive and negative charges across its plasma membrane. The membrane potential is measured in millivolts and quantifies the difference in charge across the membrane.
Like neurons, muscle cells are also regarded as excitable due to their capacity to change in response to stimuli, primarily due to voltage-gated ion channels embedded in their plasma membranes, which get activated by alterations in the cell's...
Like neurons, muscle cells are also regarded as excitable due to their capacity to change in response to stimuli, primarily due to voltage-gated ion channels embedded in their plasma membranes, which get activated by alterations in the cell's...
Specialized Characteristics of Cardiac Muscles
The primary role of cardiac muscles is to propel blood throughout the cardiovascular system. The cardiac muscle cells, or cardiomyocytes, exhibit specialized characteristics that allow them to perform this function.
Cardiac muscle cells are smaller than skeletal muscles, averaging 10–20 mm in diameter and 50–100 mm in length. However, they have large energy demands for continuous contraction and relaxation. This energy is almost exclusively derived from aerobic metabolism of energy reserves in...
Cardiac muscle cells are smaller than skeletal muscles, averaging 10–20 mm in diameter and 50–100 mm in length. However, they have large energy demands for continuous contraction and relaxation. This energy is almost exclusively derived from aerobic metabolism of energy reserves in...
The Dot Product
Measuring how one directional quantity affects another along a specific path involves comparing their orientation and strength. When two such quantities are represented using direction and amount, a numerical result is computed to show how much one acts along the path of the other. This result comes from a rule combining both inputs' horizontal and vertical parts and adding the results.This calculation gives a single value that grows larger when both inputs point in similar directions and...


