Functional Magnetic Resonance Imaging Analysis of Brain Activation for Effect of Contrast Changes in Visual Perception

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概要

• 論文の詳細を見る

• This paper aims to compare brain activities under different-contrast visual stimuli through functional magnetic resonance imaging (fMRI). The stimuli were four kinds of Landolt rings, each ring having a different gap in the position of the circle. Twelve subjects were recruited, and the subjects with prism glasses lay on their back and alternately carried out two tasks in an fMRI measurement. In task A, the subject saw visual stimuli and sometimes pushed a certain button according to arbitrary timing. In task B, the subject gazed at the stimuli, and quickly pushed a button when a target stimulus was presented. In the group activation maps in response to task B versus task A, left occipital gyrus (BA17, 18) at high-contrast stimuli, and superior parietal lobule (BA7) and prefrontal cortex at low-contrast stimuli were activated. This result indicates that the difference of visibility affects the alteration of brain activity.

• 2010-06-00

著者

• Saito Masao

  Research Center For Advanced Technologies Tokyo Denki University

• NOTOMI Kazuhiro

  Department of Information and Computer Sciences, Kanagawa Institute of Technology

• Saito Keiichi

  Research Center For Advanced Technologies Tokyo Denki University

• Notomi Kazuhiro

  Department Of Information And Computer Sciences Kanagawa Institute Of Technology

• SAITO Keiichi

  Research Center for Advanced Technologies, Tokyo Denki University

• SAITO Masao

  Research Center for Advanced Technologies, Tokyo Denki University

• WANG Li-qun

  Research Center for Advanced Technologies, Tokyo Denki University

• HIRA Shinji

  Faculty of Human Cultures and Sciences, Fukuyama University

• FURUMITU Isato

  Faculty of Human Sciences, University of East Asia

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• Functional Magnetic Resonance Imaging Analysis of Brain Activation for Effect of Contrast Changes in Visual Perception

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