Abstract：
:The memory for the final position of a moving object which suddenly disappears has been found to be displaced forward, in the direction of motion, and downwards, in the direction of gravity. These phenomena were coined, respectively, Representational Momentum and Representational Gravity. Although both these and similar effects have been systematically linked with the functioning of internal representations of physical variables (e.g. momentum and gravity), serious doubts have been raised for a cognitively based interpretation, favouring instead a major role of oculomotor and perceptual factors which, more often than not, were left uncontrolled and even ignored. The present work aims to determine the degree to which Representational Momentum and Representational Gravity are epiphenomenal to smooth pursuit eye movements. Observers were required to indicate the offset locations of targets moving along systematically varied directions after a variable imposed retention interval. Each participant completed the task twice, varying the eye movements' instructions: gaze was either constrained or left free to track the targets. A Fourier decomposition analysis of the localization responses was used to disentangle both phenomena. The results show unambiguously that constraining eye movements significantly eliminates the harmonic components which index Representational Momentum, but have no effect on Representational Gravity or its time course. The found outcomes offer promising prospects for the study of the visual representation of gravity and its neurological substrates.
journal_name
Exp Brain Resjournal_title
Experimental brain researchauthors
De Sá Teixeira NAdoi
10.1007/s00221-016-4654-0subject
Has Abstractpub_date
2016-09-01 00:00:00pages
2491-504issue
9eissn
0014-4819issn
1432-1106pii
10.1007/s00221-016-4654-0journal_volume
234pub_type
杂志文章abstract：:In anaesthetized cats (chloralose-urethan) the effects of brief tetanic electrical stimulation (50 to 100 ms) of the mesencephalic central gray matter and reticular formation on the inspiratory on-switch were studied during the expiratory (E) phase on the gross and unitary activities of phrenic, laryngeal inspiratory ...
journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00237270
更新日期：1984-01-01 00:00:00
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journal_title：Experimental brain research
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journal_title：Experimental brain research
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journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00249612
更新日期：1989-01-01 00:00:00
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pub_type： 杂志文章
doi：10.1007/s00221-003-1777-x
更新日期：2004-05-01 00:00:00
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journal_title：Experimental brain research
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更新日期：2011-02-01 00:00:00
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journal_title：Experimental brain research
pub_type： 临床试验,杂志文章,随机对照试验
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更新日期：2001-08-01 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：1984-01-01 00:00:00
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pub_type： 杂志文章
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pub_type： 杂志文章
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更新日期：2011-08-01 00:00:00
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pub_type： 杂志文章
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更新日期：2017-12-01 00:00:00
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pub_type： 临床试验,杂志文章
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