Abstract：
:We have tested the hypothesis that complex cell receptive fields are made up of subfields which, for a given cell, have either exclusively even or exclusively odd symmetry. To do this we have measured the response of complex cells in the visual cortex of the cat to members of pairs of spatially limited even-symmetric stimuli (single light and dark bars) and pairs of odd-symmetric stimuli ("light-dark" and "dark-light" double bars) successively drifting across their receptive fields. The strength of a cell's response was estimated by measuring the sum of all spikes produced by a stimulus. Some complex cells respond about equally to single light and dark bars; others respond appreciably more to either the light or dark bar. The central tendency of average response histograms was estimated by measuring the mean with respect to position across the width of the receptive field. Many complex cells show distinct spatial offsets between the mean for narrow single light and that for dark bars as well as between means to double bars of opposite phase. Combined offset plots were constructed with the spatial offsets between means for single light bars and single dark bars along the x axis and the offsets between means to double bars of opposite phase along the y axis. There is significant scatter in the combined offset points; some falling at the origin, some at significant distances from the origin along the axes, and others well within each of the four quadrants. These diverse localizations in the offset plots rule out the simple models of complex cell spatial substructure described above and, therefore, imply considerable heterogeneity within the population of complex cells.
journal_name
Exp Brain Resjournal_title
Experimental brain researchauthors
Gaska JP,Pollen DA,Cavanagh Pdoi
10.1007/BF00248791subject
Has Abstractpub_date
1987-01-01 00:00:00pages
249-59issue
2eissn
0014-4819issn
1432-1106journal_volume
68pub_type
杂志文章abstract：:Almost two decades ago, sequential effects of human grasping behaviour were described for the first time: In a sequential task, participants persisted in using the previous grasp type. According to the plan-modification hypothesis, such sequential effects reduce the movement planning costs and occur within a limited r...
journal_title：Experimental brain research
pub_type： 杂志文章,随机对照试验
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journal_title：Experimental brain research
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abstract：:The purpose of this study was to investigate the relationship between EEG-derived motor activity-related cortical potential (MRCP) and voluntary muscle activation. Eight healthy volunteers participated in two experimental sessions. In one session, subjects performed isometric elbow-flexion contractions at four intensi...
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abstract：:Linear and angular control of trunk and leg motion during curvilinear navigation was investigated in subjects with cerebellar ataxia and age-matched control subjects. Subjects walked with eyes open around a 1.2-m circle. The relationship of linear to angular motion was quantified by determining the ratios of trunk lin...
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journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-010-2515-9
更新日期：2011-09-01 00:00:00
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journal_title：Experimental brain research
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journal_title：Experimental brain research
pub_type： 杂志文章,随机对照试验
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更新日期：2013-02-01 00:00:00
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pub_type： 杂志文章
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更新日期：2007-07-01 00:00:00
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更新日期：2003-04-01 00:00:00
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doi：10.1007/BF00230292
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journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-016-4591-y
更新日期：2016-05-01 00:00:00
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journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/BF00237671
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
doi：10.1007/BF00608257
更新日期：1990-01-01 00:00:00
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pub_type： 杂志文章
doi：10.1007/BF00250260
更新日期：1988-01-01 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：2010-03-01 00:00:00
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pub_type： 杂志文章
doi：10.1007/BF00247935
更新日期：1989-01-01 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：1990-01-01 00:00:00
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pub_type： 杂志文章
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更新日期：2005-03-01 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：1995-01-01 00:00:00
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journal_title：Experimental brain research
pub_type： 杂志文章
doi：10.1007/s00221-008-1289-9
更新日期：2008-05-01 00:00:00
