Abstract:
:Estimates of visual field topographies in human visual cortex obtained through fMRI traveling wave techniques usually provide the parameters of population receptive field (pRF) location (polar angle, eccentricity) and receptive field size. These parameters are obtained by fitting the recorded data to a standard model population receptive field. In this work, pRF profiles are measured directly by back-projecting preprocessed fMRI time-series to sweeps of a bar across the visual field in different angles. The current data suggest that the model-free pRF profiles contain information not only about receptive field location and size but also about the pRF shape characteristics. The elongation (ellipticity) of pRFs decreases along the early visual hierarchy to a different degree for the ventral and the dorsal stream. Furthermore, ellipticity changes as a function of eccentricity. pRF orientation shows a high degree of collinearity with its angular position within the visual field. Using model-free pRF measurements, the traveling wave technique provides additional characteristics of pRF topographies that are not restricted to size and provide robust measures within the single subject.
journal_name
Hum Brain Mappjournal_title
Human brain mappingauthors
Merkel C,Hopf JM,Schoenfeld MAdoi
10.1002/hbm.24015subject
Has Abstractpub_date
2018-06-01 00:00:00pages
2472-2481issue
6eissn
1065-9471issn
1097-0193journal_volume
39pub_type
杂志文章abstract::One of our highest evolved functions as human beings is our capacity to switch between multiple tasks effectively. A body of research has identified a distributed frontoparietal network of brain regions which contribute to task switching. However, relatively less is known about whether some brain regions may contribut...
journal_title:Human brain mapping
pub_type: 杂志文章,meta分析
doi:10.1002/hbm.21199
更新日期:2012-01-01 00:00:00
abstract:UNLABELLED:Major depression has been repeatedly associated with amygdala hyper-responsiveness to negative (but not positive) facial expressions at early, automatic stages of emotion processing using subliminally presented stimuli. However, it is not clear whether this "limbic bias" is a correlate of depression or repre...
journal_title:Human brain mapping
pub_type: 杂志文章
doi:10.1002/hbm.22112
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abstract::A new procedure to model extended cortical sources from EEG and MEG recordings based on a probabilistic approach is presented. The method (SPMECS) was implemented within the framework of maximum likelihood estimators. Neuronal activity generating EEG or MEG signals was characterized by the number of sources and their ...
journal_title:Human brain mapping
pub_type: 杂志文章
doi:10.1002/hbm.10079
更新日期:2003-02-01 00:00:00
abstract::We previously showed that dual-task cost (DTC) on gait speed in people with Parkinson's disease (PD) improved after 6 weeks of the Agility Boot Camp with Cognitive Challenge (ABC-C) exercise program. Since deficits in dual-task gait speed are associated with freezing of gait and gray matter atrophy, here we performed ...
journal_title:Human brain mapping
pub_type: 杂志文章
doi:10.1002/hbm.25211
更新日期:2021-01-01 00:00:00
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journal_title:Human brain mapping
pub_type: 杂志文章
doi:10.1002/hbm.22249
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journal_title:Human brain mapping
pub_type: 杂志文章
doi:10.1002/hbm.22648
更新日期:2015-02-01 00:00:00
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journal_title:Human brain mapping
pub_type: 杂志文章,meta分析
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journal_title:Human brain mapping
pub_type: 杂志文章
doi:10.1002/hbm.20636
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journal_title:Human brain mapping
pub_type: 杂志文章
doi:10.1002/hbm.20605
更新日期:2009-04-01 00:00:00
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journal_title:Human brain mapping
pub_type: 杂志文章
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journal_title:Human brain mapping
pub_type: 杂志文章
doi:10.1002/hbm.20925
更新日期:2010-08-01 00:00:00
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journal_title:Human brain mapping
pub_type: 杂志文章
doi:10.1002/hbm.23186
更新日期:2016-07-01 00:00:00
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journal_title:Human brain mapping
pub_type: 杂志文章
doi:10.1002/hbm.22680
更新日期:2015-03-01 00:00:00
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journal_title:Human brain mapping
pub_type: 杂志文章
doi:10.1002/hbm.23934
更新日期:2018-04-01 00:00:00
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journal_title:Human brain mapping
pub_type: 杂志文章
doi:10.1002/hbm.22002
更新日期:2013-07-01 00:00:00
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journal_title:Human brain mapping
pub_type: 杂志文章
doi:10.1002/hbm.23501
更新日期:2017-04-01 00:00:00
abstract::Transcranial magnetic stimulation (TMS) during positron emission tomography (PET) is a novel technique for in vivo measurements of connectivity and excitability of the human cerebral cortex. Here we describe tools that allow investigators to position the stimulating coil over a target region and to verify the actual p...
journal_title:Human brain mapping
pub_type: 杂志文章,评审
doi:
更新日期:1998-01-01 00:00:00
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journal_title:Human brain mapping
pub_type: 杂志文章
doi:10.1002/hbm.22201
更新日期:2014-02-01 00:00:00
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journal_title:Human brain mapping
pub_type: 杂志文章
doi:10.1002/hbm.24679
更新日期:2019-09-01 00:00:00
abstract:OBJECTIVES:Recovery of independent ambulation after stroke is a major goal. However, which rehabilitation regimen best benefits each individual is unknown and decisions are currently made on a subjective basis. Predictors of response to specific therapies would guide the type of therapy most appropriate for each patien...
journal_title:Human brain mapping
pub_type: 杂志文章,随机对照试验
doi:10.1002/hbm.23059
更新日期:2016-02-01 00:00:00
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journal_title:Human brain mapping
pub_type: 杂志文章
doi:10.1002/hbm.22073
更新日期:2013-10-01 00:00:00
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journal_title:Human brain mapping
pub_type: 杂志文章,评审
doi:10.1002/hbm.24314
更新日期:2018-12-01 00:00:00
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journal_title:Human brain mapping
pub_type: 杂志文章
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更新日期:2019-04-01 00:00:00
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journal_title:Human brain mapping
pub_type: 杂志文章
doi:10.1002/hbm.24273
更新日期:2018-11-01 00:00:00
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journal_title:Human brain mapping
pub_type: 杂志文章
doi:10.1002/hbm.24436
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journal_title:Human brain mapping
pub_type: 杂志文章
doi:10.1002/hbm.20960
更新日期:2010-10-01 00:00:00
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journal_title:Human brain mapping
pub_type: 杂志文章
doi:10.1002/(sici)1097-0193(200006)10:2<61::aid-hbm20>
更新日期:2000-06-01 00:00:00
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journal_title:Human brain mapping
pub_type: 杂志文章
doi:10.1002/hbm.20706
更新日期:2009-09-01 00:00:00
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journal_title:Human brain mapping
pub_type: 杂志文章
doi:10.1002/hbm.25155
更新日期:2020-11-01 00:00:00
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journal_title:Human brain mapping
pub_type: 杂志文章
doi:10.1002/hbm.23518
更新日期:2017-04-01 00:00:00