運動の選択は,上部のコリキュルスの作用を前にする

P W Glimcher¹, D L Sparks

¹Department of Psychology, University of Pennsylvania, Philadelphia 19104.

Nature

|February 6, 1992

まとめ

研究者は,上部コリキュルスのサッカード選択の神経機構を調査した. プレリュードバスターニューロン活動はサッカード選択を予測し,上部コリキュルスが目の動きの選択に関与していることを示唆しています.

科学分野:

神経科学は神経科学である.
オキュロモーター研究
プライマートの視力

背景:

霊長類の上部コリキュル (SC) には,サッカディックな眼球の動きの地図が含まれています.
標的の選択と眼運動レパートリーの選択のための神経機構は,まだ十分に理解されていません.
2つのニューロンクラス,離散およびプレリュードバスターは,SCで前サッカディック活動を表しています.

研究の目的:

サッカドの選択におけるプレリュードバスター活動の役割を調査する.
プレリュード活動が,利用可能なオプションの中から特定のサッカードを選択することと関連しているかどうかを判断する.

主な方法:

実験では,2つの同一の視覚的刺激の間に迫り来るサッカードのための標的を指定するためにシューを使用しました.
キューは,ターゲットと動作開始シグナルから空間的に,また一時的に隔離されていた.
ニューロンの活動,特にプレリュードの活動は,サッカード選択に関連して記録されました.

主要な成果:

前奏の活動は,サッカード選択の情報が利用可能になった直後に観察されました.
プレリュード・バースターの活動は,選択されたサッカデーの予測であることが判明しました.
この活動パターンは,選抜プロセスにおけるSCの役割を支持しています.

結論:

上部コリキュルスは,サッカディックな眼球運動の選択に役割を果たします.
プレリュード・バースター活動は,サッカード・セレクションの神経相関である.
これらのメカニズムを理解することは,視覚的に誘導された行動を理解するために不可欠です.

さらに関連する動画

04:49

Enhancing Upper Limb Function and Motor Skills Post-Stroke Through an Upper Limb Rehabilitation Robot

Published on: September 6, 2024

05:28

Application of a Dual Upper Limb Task-Oriented Robotic System for the Functional Recovery of the Upper Limb in Stroke Patients

Published on: October 11, 2024

関連する概念動画

00:58

Introduction to Joints

The adult human body usually has 206 bones, and except for the hyoid bone in the neck, each bone is connected to at least one other bone. Joints are the location where bones come together. Many joints allow for movement between the bones. At these joints, the articulating surfaces of the adjacent bones can move smoothly against each other. However, the bones of other joints may be joined by connective tissue or cartilage. These joints are designed for stability and provide little or no movement.

00:51

Anatomical Movements

Anatomical movements refer to the various actions or motions that can be performed by the body's joints and muscles. These movements are described using specific terms to provide a standardized way of discussing and understanding the range of motion at different joints.
Here are some common anatomical movements:
Flexion and extension motions are in the sagittal (anterior–posterior) plane of motion. These movements take place at the shoulder, hip, elbow, knee, wrist, metacarpophalangeal,...

01:22

Steps for Free-Body Diagram

When it comes to studying the behavior of objects in mechanics, one of the most important tools available is the free-body diagram. Consider a simple example of a system of two blocks coupled by a massless string over a frictionless pulley. Block 1 is sliding over a table pulled by block 2 as block 2 falls under gravity.
To find the acceleration of the system, it is first necessary to calculate the net force on the system. In order to accomplish this, a free-body diagram can be created to...

01:30

Free-body Diagrams: Problem Solving

Free-body diagrams are essential tools for physicists and engineers studying the motion of objects. Free-body diagrams are graphical representations of the object or system under consideration, and they focus solely on the essential forces acting on the object. This tool helps break down complex problems into simpler models that are easier to understand and solve.
For example, consider a block with a mass of 10 kg released on an inclined plane at an angle of 30° to the horizontal, where the...

01:13

Structure and Organization of Smooth Muscles

Smooth muscle tissue is a type of muscle tissue that can be found lining various vital organs in the human body, including the lungs, blood vessels, digestive tract, and respiratory tract. This type of tissue is responsible for regulating the movements of these organs, playing crucial roles in the functioning of various systems, including the vascular, digestive, respiratory, and urinary systems.
Structure of smooth muscle cell
Smooth muscle cells are spindle-shaped with tapering ends and a...

01:24

Muscle Coordination and Action

Muscle coordination is a complex and finely tuned process essential for smooth and purposeful movements like flexion, extension, adduction, abduction, and rotation. The human body orchestrates the actions of various muscles working in concert, each with a specific role. Four functional types describe how muscles work together: agonist, antagonist, synergist, and fixator.
Agonists
Agonist muscles, often called prime movers, are the primary muscles responsible for producing a specific movement.

関連する実験動画