Abstract:
:The aim of this study was to assess the plasticity of human voluntary fixational eye movement control in relation to visual experience/chronic visual deprivation. Twelve blind adults participated (self-reported vision < or = light perception in each eye; age range = 23-56 years; visual experience range = 0-28 years; blindness duration range = 6-55 years). Infrared-based recordings of horizontal eye movements were made before, during, and immediately after three 30-s periods of auditory ocular motor feedback, while participants were instructed to look straight ahead and keep their eyes as steady as possible. Percent change in horizontal displacement of the eye during and after feedback was compared with the no-feedback baseline. Eleven of the 12 individuals demonstrated feedback-mediated increase in eye stability, which improved as a function of visual experience. Improved eye stability was inversely related to duration of blindness. Clearly, blind adults can use nonvisual external feedback to stabilize gaze. Thus, the fixational subsystem can exhibit improved voluntary control despite chronic visual deprivation. Possible cortical and subcortical mechanisms are discussed.
journal_name
Vis Neuroscijournal_title
Visual neuroscienceauthors
Hall EC,Ciuffreda KJdoi
10.1017/s0952523802194090subject
Has Abstractpub_date
2002-07-01 00:00:00pages
475-81issue
4eissn
0952-5238issn
1469-8714pii
S0952523802194090journal_volume
19pub_type
杂志文章abstract::The aim of this study was to determine whether agmatine, a channel permeable probe, can identify photoreceptor dysfunction in the Royal College of Surgeons (RCS) retina at an earlier stage to that shown by apoptosis or anatomical markers, and also characterize the neurochemical development of the inner retina in the n...
journal_title:Visual neuroscience
pub_type: 杂志文章
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journal_title:Visual neuroscience
pub_type: 杂志文章
doi:10.1017/S095252380808070X
更新日期:2008-07-01 00:00:00
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journal_title:Visual neuroscience
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doi:10.1017/s0952523800011160
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journal_title:Visual neuroscience
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doi:10.1017/S0952523809090014
更新日期:2009-01-01 00:00:00
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更新日期:2007-05-01 00:00:00
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journal_title:Visual neuroscience
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更新日期:2000-09-01 00:00:00
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journal_title:Visual neuroscience
pub_type: 杂志文章
doi:10.1017/s095252380001107x
更新日期:1994-01-01 00:00:00
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journal_title:Visual neuroscience
pub_type: 杂志文章
doi:10.1017/S0952523804214055
更新日期:2004-07-01 00:00:00
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pub_type: 临床试验,杂志文章
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更新日期:2005-11-01 00:00:00
abstract::The presence of opioid receptors has been confirmed by a variety of techniques in vertebrate retinas including those of mammals; however, in most reports, the location of these receptors has been limited to retinal regions rather than specific cell types. Concurrently, our knowledge of the physiological functions of o...
journal_title:Visual neuroscience
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doi:10.1017/S0952523812000156
更新日期:2012-05-01 00:00:00
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doi:10.1017/s0952523801185081
更新日期:2001-09-01 00:00:00
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journal_title:Visual neuroscience
pub_type: 杂志文章
doi:10.1017/S0952523806233492
更新日期:2006-05-01 00:00:00
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journal_title:Visual neuroscience
pub_type: 杂志文章
doi:10.1017/s0952523800009846
更新日期:1989-12-01 00:00:00
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journal_title:Visual neuroscience
pub_type: 杂志文章
doi:10.1017/S0952523812000119
更新日期:2012-05-01 00:00:00
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journal_title:Visual neuroscience
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doi:10.1017/s0952523899165040
更新日期:1999-09-01 00:00:00
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更新日期:2000-07-01 00:00:00
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pub_type: 杂志文章
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更新日期:2006-05-01 00:00:00
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journal_title:Visual neuroscience
pub_type: 杂志文章
doi:10.1017/s0952523800006441
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journal_title:Visual neuroscience
pub_type: 杂志文章
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更新日期:1998-09-01 00:00:00
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journal_title:Visual neuroscience
pub_type: 杂志文章
doi:10.1017/s0952523800000444
更新日期:1990-10-01 00:00:00
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journal_title:Visual neuroscience
pub_type: 杂志文章
doi:10.1017/s0952523898156158
更新日期:1998-11-01 00:00:00
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journal_title:Visual neuroscience
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更新日期:1997-09-01 00:00:00