The jitter spatial frequency sweep vep: a new paradigm to study spatiotemporal development of pattern- and motion-processing mechanisms in human infants Report as inadecuate




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Anthony M. Norcia ;Psychology & Neuroscience 2009, 2 2

Author: Russell D. Hamer

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Psychology & Neuroscience ISSN: 1984-3054 landeira@puc-rio.br Pontifícia Universidade Católica do Rio de Janeiro Brasil Hamer, Russell D.; Norcia, Anthony M. The Jitter Spatial Frequency Sweep VEP: a new paradigm to study spatiotemporal development of pattern- and motion-processing mechanisms in human infants Psychology & Neuroscience, vol.
2, núm.
2, julio-diciembre, 2009, pp.
163-177 Pontifícia Universidade Católica do Rio de Janeiro Rio de Janeiro, Brasil Available in: http:--www.redalyc.org-articulo.oa?id=207014866008 How to cite Complete issue More information about this article Journals homepage in redalyc.org Scientific Information System Network of Scientific Journals from Latin America, the Caribbean, Spain and Portugal Non-profit academic project, developed under the open access initiative PSYCHOLOGY NEUROSCIENCE Psychology & Neuroscience, 2009, 2, 2, 163 - 177 DOI: 10.3922-j.psns.2009.2.008 The Jitter Spatial Frequency Sweep VEP: A new paradigm to study spatiotemporal development of pattern- and motionprocessing mechanisms in human infants Russell D.
Hamer1,2 and Anthony M.
Norcia1 1 Smith-Kettlewell Eye Research Institute, USA 2 Universidade de São Paulo, Brazil Abstract We introduce a new VEP paradigm - the Jitter Spatial Frequency (JSF) Sweep VEP - that permits efficient mapping of the spatiotemporal tuning of the developmental motion asymmetry (DMA).
Vertical sinewave gratings undergoing 90o horizontal oscillatory displacements (6 or 10 Hz) were presented while their SF was swept over 2 to 5 octaves during each VEP trial. JSF sweep VEPs were recorded from 28 infants (8-43 weeks), and symmetric (second-harmonic, F2) and asymmetric (F1) components of the VEP were measured.
JSF sweeps can provide four useful estimate: (1,2) the high-SF cutoff of F1 and F2 responses estimate the spatial resolution of direction-selective (DS) and non-DS mechanisms, respectively; (3) the low-SF cutoff for F1 estimate the SF-boundary between mature (F1 absen...





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