Neuroscience 2004 Abstract
| Presentation Number: | 526.16 |
|---|---|
| Abstract Title: | Distinct processing pathways in three-dimensional form perception: A functional magnetic resonance imaging study. |
| Authors: |
Yamamoto, T.*1
; Takahashi, S.2
; Hanakawa, T.
; Urayama, S.
; Fukuyama, H.
; Ejima, Y.
1Grad. Sch. of Human and Envrn. Studies, Kyoto Univ., Kyoto, Japan 2Japan, Yoshida-nihonmatsu-cho, Sakyo-ku, 606-8501, |
| Primary Theme and Topics |
Sensory Systems - Vision -- Visual cortex: Motion and depth |
| Session: |
526. Motion and Optic Flow Poster |
| Presentation Time: | Monday, October 25, 2004 4:00 PM-5:00 PM |
| Location: | San Diego Convention Center - Hall A-H, Board # T14 |
| Keywords: | VISUAL MOTION, BRAIN IMAGING, PARIETAL CORTEX |
We used functional magnetic resonance imaging (fMRI) to investigate human visual pathways underlying perception of three-dimensional (3-D) structure from motion induced by two-dimensional (2-D) rotational or translational motion. We compared significant brain activity regions between 2-D and 3-D conditions in each motion stimulus by using a block paradigm. In each experimental scan, subjects viewed a rotational or translational stimuli. The 3-D condition was presented for 16 seconds, followed by the 2-D condition for 16 seconds. Each condition was alternately repeated 12 times. The fMRI was done at 3T. For 3-D structure-from-motion (SFM) by the rotational motion stimulus, the parieto-occipital area, especially V3A, the intraparietal sulcus (IPS) and the inferior parietal lobule (IPL), activated. On the other hand, for 3-D SFM by the translational motion stimulus, significant activation was not observed in the parieto-occipital area. It may be suggested that the separated pathways contribute to 3-D SFM by rotational and translational motion. There still remained a possibility that the stimulus difference between rotational and translational motion brought these results. While the rotational motion stimulus had strong shape information, the translational stimulus did not have it but spatial information. The difference in information types might affect 3-D perception.
Sample Citation:
[Authors]. [Abstract Title]. Program No. XXX.XX. 2004 Neuroscience Meeting Planner. San Diego, CA: Society for Neuroscience, 2004. Online.
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