+ Most Popular
Cunninghamia lanceolata plantations in China
Mammalian lairs in paleo ecological studies and palynology
Studies on technological possibilities in utilization of anhydrous milk fat for production of recombined butter-like products
Should right-sided fibroelastomas be operated upon?
Large esophageal lipoma
Apoptosis in the mammalian thymus during normal histogenesis and under various in vitro and in vivo experimental conditions
Poissons characoides nouveaux ou non signales de l'Ilha do Bananal, Bresil
Desensitizing efficacy of Colgate Sensitive Maximum Strength and Fresh Mint Sensodyne dentifrices
Administration of fluid by subcutaneous infusion: revival of a forgotten method
Tundra mosquito control - an impossible dream?
Schizophrenia for primary care providers: how to contribute to the care of a vulnerable patient population
Geochemical pattern analysis; method of describing the Southeastern limestone regional aquifer system
Incidence of low birth weights in a hospital of Mexico City
Graded management intensity of grassland systems for enhancing floristic diversity
Microbiology and biochemistry of cheese and fermented milk
The ember tetra: a new pygmy characid tetra from the Rio das Mortes, Brazil, Hyphessobrycon amandae sp. n. (Pisces, Characoidei)
Risk factors of contrast-induced nephropathy in patients after coronary artery intervention
Renovation of onsite domestic wastewater in a poorly drained soil
Observations of the propagation velocity and formation mechanism of burst fractures caused by gunshot
Systolic blood pressure in a population of infants in the first year of life: the Brompton study
Haematological studies in rats fed with metanil yellow
Studies on pasteurellosis. I. A new species of Pasteurella encountered in chronic fowl cholera
Dormancy breaking and germination of Acacia salicina Lindl. seeds
therapy of lupus nephritis. a two-year prospective study

Effect of spatial frequency of stimulus on focal macular ERGs in monkeys : fmacERG dependence on the spatial-frequency

Effect of spatial frequency of stimulus on focal macular ERGs in monkeys : fmacERG dependence on the spatial-frequency

Documenta Ophthalmologica. Advances in Ophthalmology 113(2): 83-91

ISSN/ISBN: 0012-4486

PMID: 17028912

DOI: 10.1007/s10633-006-9017-x

Purpose To determine the effect of the spatial frequency of a small grating stimulus centered on the macula on the focal macular ERGS (fmacERGs) of monkeys.Methods fmacERGs were recorded from eight eyes of four adult monkeys (Macaca fuscata). The spatial frequency of the stimulus was changed from 0.25 to 8 cycles/degree. The luminance of the light bars was 10 cd/m(2), and the contrast was 95%. The stimulus was flashed on and off with an on duration of 100 ms and an off duration of 150 ms (4 Hz). The stimulus was centered on the fovea and subtended 12.7 at the cornea. The luminance of the steady light-adapting background was 3.5 cd/m2. The location of the stimulus on the retina was monitored throughout the recordings. The effects of the spatial frequency of the stimulus on the amplitudes and implicit times of the a-waves, b-waves, and oscillatory potentials (OPs) were determined. fmacERGs were also recorded following intravitreal tetrodotoxin (TTX).Results The amplitudes of the a- and b-waves did not change with changes in the spatial frequency of the stimulus. The OPs, on the other hand, responded best to the lowest spatial frequency, and the OPs after the first two were attenuated at intermediate and higher frequencies (Wilcoxon signed-rank test: P < 0.05). TTX reduced all OP wavelets in monkeys.Conclusions The OPs of the photopic macular ERGS are affected by the spatial frequency of the stimulus and are reduced by TTX, consistent with their being generated by inner retinal neurons.

Please choose payment method:

(PDF emailed within 0-6 h: $19.90)

Accession: 012966091

Download citation: RISBibTeXText

Related references

Spatial summation properties of the human ocular following response (OFR): dependence upon the spatial frequency of the stimulus. Vision Research 68: 1-13, 2012

VEP dependence on 2-D FFT spatial frequency stimulus content. Society for Neuroscience Abstracts 19(1-3): 772, 1993

Spatial frequency tuning of the Ouchi illusion and its dependence on stimulus size. Vision Research 42(11): 1413-1420, 2002

Spatial-frequency characteristics of neurones of area 18 in the cat: dependence on the velocity of the visual stimulus. Journal of Physiology 359: 259-268, 1985

Spatial frequency dependence of stereopsis in monkeys reared with alternating monocular defocus. IOVS Investigative Ophthalmology and Visual Science 38(4 Part 1-2): S498, 1997

Local sensitivity to stimulus orientation and spatial frequency within the receptive fields of neurons in visual area 2 of macaque monkeys. Journal of Neurophysiology 107(4): 1094-1110, 2012

Spatial characteristics of motion-sensitive mechanisms change with age and stimulus spatial frequency. Vision Research 53(1): 1-14, 2012

Pattern ergs and check size: absence of spatial frequency tuning. Current Eye Research 2(8): 511-521, 1982

Spatial-frequency tuning as a function of temporal frequency and stimulus motion. Journal of the Optical Society of America. A Optics and Image Science 5(8): 1362-1373, 1988

Spatial frequency masking in human vision dependence on contrast and frequency. IOVS Investigative Ophthalmology and Visual Science 18: 59, 1979

Spatial frequency dependence of the human visual cortical response to temporal frequency modulation studied by fMRI. Conference Proceedings: .. Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual Conference 2005: 5802-5803, 2005

Dependence of motion assimilation and motion contrast on spatial frequency-component of stimulus gratings. IOVS Investigative Ophthalmology and Visual Science 36(4): S56, 1995

The spatial frequency dependence of the McCollough effect. IOVS Investigative Ophthalmology and Visual Science 35(4): 1836, 1994

Spatial frequency discrimination for sinewave gratings with random, bandpass frequency modulation: evidence for averaging in spatial acuity. Spatial Vision 2(4): 317-335, 1987

Half field veps effect of the spatial frequency of the stimulus on the contralateral components. Electroencephalography and Clinical Neurophysiology 66(5): S82-S83, 1987