Abstract：
:The coordination between eye and head movements during a rapid orienting gaze shift has been investigated mainly when subjects made horizontal movements towards visual targets with the eyes starting at the centre of the orbit. Under these conditions, it is difficult to identify the signals driving the two motor systems, because their initial motor errors are identical and equal to the coordinates of the sensory stimulus (i.e. retinal error). In this paper, we investigate head-free gaze saccades of human subjects towards visual as well as auditory stimuli presented in the two-dimensional frontal plane, under both aligned and unaligned initial fixation conditions. Although the basic patterns for eye and head movements were qualitatively comparable for both stimulus modalities, systematic differences were also obtained under aligned conditions, suggesting a task-dependent movement strategy. Auditory-evoked gaze shifts were endowed with smaller eye-head latency differences, consistently larger head movements and smaller concomitant ocular saccades than visually triggered movements. By testing gaze control for eccentric initial eye positions, we found that the head displacement vector was best related to the initial head motor-error (target-re-head), rather than to the initial gaze error (target-re-eye), regardless of target modality. These findings suggest an independent control of the eye and head motor systems by commands in different frames of reference. However, we also observed a systematic influence of the oculomotor response on the properties of the evoked head movements, indicating a subtle coupling between the two systems. The results are discussed in view of current eye-head coordination models.
journal_name
Exp Brain Resjournal_title
Experimental brain researchauthors
Goossens HH,Van Opstal AJdoi
10.1007/pl00005663subject
Has Abstractpub_date
1997-05-01 00:00:00pages
542-60issue
3eissn
0014-4819issn
1432-1106journal_volume
114pub_type
临床试验,杂志文章abstract：:Given the number of muscles and joints of the arm, more ways are available to produce an identical hand movement when pointing to a target than are strictly necessary. How the nervous system manages these abundant degrees of freedom was the focus of this study of pointing to targets of low and high indices of difficul...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-002-1357-5
更新日期：2003-04-01 00:00:00
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journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00230391
更新日期：1992-01-01 00:00:00
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journal_title：Experimental brain research
pub_type： 临床试验,杂志文章
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journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-005-0259-8
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journal_title：Experimental brain research
pub_type： 杂志文章
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更新日期：1991-01-01 00:00:00
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pub_type： 杂志文章
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journal_title：Experimental brain research
pub_type： 杂志文章
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更新日期：1995-01-01 00:00:00
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journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00229366
更新日期：1993-01-01 00:00:00
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journal_title：Experimental brain research
pub_type： 临床试验,杂志文章
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journal_title：Experimental brain research
pub_type： 杂志文章
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journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-011-2799-4
更新日期：2011-09-01 00:00:00
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journal_title：Experimental brain research
pub_type： 杂志文章,评审
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更新日期：2013-10-01 00:00:00
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journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-011-2966-7
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journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00238898
更新日期：1981-01-01 00:00:00
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journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-002-1351-y
更新日期：2003-02-01 00:00:00
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journal_title：Experimental brain research
pub_type： 杂志文章,随机对照试验
doi：10.1007/s00221-015-4218-8
更新日期：2015-05-01 00:00:00
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journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s002210050848
更新日期：1999-10-01 00:00:00
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journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00236812
更新日期：1983-01-01 00:00:00
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journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00237546
更新日期：1980-01-01 00:00:00
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journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-002-1366-4
更新日期：2003-04-01 00:00:00
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journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00229009
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pub_type： 杂志文章
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journal_title：Experimental brain research
pub_type： 杂志文章
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更新日期：2012-04-01 00:00:00
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journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00230917
更新日期：1985-01-01 00:00:00
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journal_title：Experimental brain research
pub_type： 杂志文章
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更新日期：1989-01-01 00:00:00
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journal_title：Experimental brain research
pub_type： 杂志文章
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更新日期：1984-01-01 00:00:00
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journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-006-0779-x
更新日期：2007-05-01 00:00:00
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journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-017-5093-2
更新日期：2017-12-01 00:00:00
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journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-005-0138-3
更新日期：2006-02-01 00:00:00
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journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-002-1321-4
更新日期：2003-02-01 00:00:00
