期刊
JOURNAL OF NEUROSCIENCE
卷 27, 期 38, 页码 10249-10258出版社
SOC NEUROSCIENCE
DOI: 10.1523/JNEUROSCI.0938-07.2007
关键词
auditory localization; adaptation; eye movement; multisensory; spatial perception; gaze
资金
- NEI NIH HHS [R32-EY07125, P30 EY001319, T32 EY007125, P30-EY01319] Funding Source: Medline
- NIA NIH HHS [R01-AG16319, R01 AG016319] Funding Source: Medline
- NIDCD NIH HHS [P30-DC05409, P30 DC005409] Funding Source: Medline
- NIGMS NIH HHS [T32 GM007356, T32-GM07356] Funding Source: Medline
Audition and vision both form spatial maps of the environment in the brain, and their congruency requires alignment and calibration. Because audition is referenced to the head and vision is referenced to movable eyes, the brain must accurately account for eye position to maintain alignment between the two modalities as well as perceptual space constancy. Changes in eye position are known to variably, but inconsistently, shift sound localization, suggesting subtle shortcomings in the accuracy or use of eye position signals. We systematically and directly quantified sound localization across a broad spatial range and over time after changes in eye position. A sustained fixation task addressed the spatial (steady-state) attributes of eye position-dependent effects on sound localization. Subjects continuously fixated visual reference spots straight ahead (center), to the left (20 degrees), or to the right (20 degrees) of the midline in separate sessions while localizing auditory targets using a laser pointer guided by peripheral vision. An alternating fixation task focused on the temporal (dynamic) aspects of auditory spatial shifts after changes in eye position. Localization proceeded as in sustained fixation, except that eye position alternated between the three fixation references over multiple epochs, each lasting minutes. Auditory space shifted by similar to 40% toward the new eye position and dynamically over several minutes. We propose that this spatial shift reflects an adaptation mechanism for aligning the straight-ahead of perceived sensory-motor maps, particularly during early childhood when normal ocular alignment is achieved, but also resolving challenges to normal spatial perception throughout life.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据