Fourier-analysed steady-state VEPs in pre-school children with and without normal binocularity.

Documenta Ophthalmologica. Advances in Ophthalmology
Björn Johansson, Peter Jakobsson

Abstract

Pre-school children aged 4-5 were examined with steady-state VEP in response to a sinusoidal grating pattern with a spatial frequency of 4 c/deg, reversing at rates 5, 10, and 15 Hz. Normal children (n = 10) were compared with subjects lacking stereo perception (n = 6) and with subjects showing significant unilateral amblyopia with visual acuity in the worse eye <0.5 (n = 7). Fast Fourier Transform was used for analysis of the crude steady-state VEP responses. Compared to normals, the subjects lacking stereo perception showed a significantly lower power of the second harmonic in the response evoked by binocular stimulation with gratings reversed at 15 Hz. The amblyopic group showed a significant difference between the dominant and the non-dominant eye regarding the first harmonic power in the responses evoked by gratings reversed at 5 and 10 Hz. These findings are discussed in relation to the magnocellular and parvocellular visual pathways and suggested models for linear and non-linear processing of visual signals.

References

Jan 1, 1988·Graefe's Archive for Clinical and Experimental Ophthalmology = Albrecht Von Graefes Archiv Für Klinische Und Experimentelle Ophthalmologie·B BagoliniB Falsini
Jan 1, 1981·Electroencephalography and Clinical Neurophysiology·P A ApkarianC W Tyler
Apr 9, 2001·Documenta Ophthalmologica. Advances in Ophthalmology·B Johansson, P Jakobsson
Jul 26, 2002·The Japanese Journal of Physiology·Tsuneo NegawaKazuo Kuwata
Jan 15, 2005·Graefe's Archive for Clinical and Experimental Ophthalmology = Albrecht Von Graefes Archiv Für Klinische Und Experimentelle Ophthalmologie·Shoichi MizoguchiKenji Ishii

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Citations

Feb 1, 2011·Documenta Ophthalmologica. Advances in Ophthalmology·David S NicolDaphne L McCulloch
May 13, 2014·Documenta Ophthalmologica. Advances in Ophthalmology·Noémie Hébert-LalondeDave Saint-Amour
Apr 24, 2016·Pediatric Neurology·Noémie Hébert-LalondeDave Saint-Amour
Sep 28, 2015·Restorative Neurology and Neuroscience·Jiawei ZhouRobert F Hess
Dec 8, 2009·Progress in Neurobiology·François-Benoît VialatteAndrzej Cichocki
Dec 20, 2008·Korean Journal of Ophthalmology : KJO·Woosuk ChungSueng-Han Han

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