Spatial frequency selectivity during saccadic eye movements revealed by masking

David Burr, Stefano Baldassi, Barbara Marconi, Concetta Morrone

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Purpose: Low but not high spatial frequencies are suppressed during saccades (Burr et al., J. Physiol. 1982), probably because of selective suppression of the magnocellular pathway (Burr et al., Nature 1994). Here we investigate further the mechanisms for the suppression, using masking techniques. Methods: Contrast sensitivity for horizontally oriented test grating patches of low spatial frequency (0.07 c/deg) was measured in the presence of continuously displayed, randomly jittering mask gratings of variable contrast and spatial frequency, using a forced-choice procedure. The test gratings were presented briefly (8 ms) during normal vision and during large horizontal saccades. Results: Sensitivity decreased with mask contrast, with a similar (near linear) dependency during normal viewing and during saccades. For both normal and saccadic viewing, maximum reduction in sensitivity occurred when the mask had the same spatial frequency as that of the test (0.07 c/deg), at all levels of mask contrast. Conclusions: That maximum masking occurs at the same spatial frequency of the test implies that mechanisms selective to low spatial frequencies are not totally suppressed during saccades, but continue to operate with reduced sensitivity. This result fits well with the acceleration of the impulse response for luminance but not for chromatic stimuli during saccades (Burr and Morrone, Vision Res. 1996), that may result from gain changes in the magnocellular pathway during saccades.

Original languageEnglish
JournalInvestigative Ophthalmology and Visual Science
Volume37
Issue number3
Publication statusPublished - Feb 15 1996

Fingerprint

Saccades
Masks
Contrast Sensitivity
Patch Tests
Color

ASJC Scopus subject areas

  • Ophthalmology

Cite this

Spatial frequency selectivity during saccadic eye movements revealed by masking. / Burr, David; Baldassi, Stefano; Marconi, Barbara; Morrone, Concetta.

In: Investigative Ophthalmology and Visual Science, Vol. 37, No. 3, 15.02.1996.

Research output: Contribution to journalArticle

@article{9a0193e367c742268656f450ca1035f5,
title = "Spatial frequency selectivity during saccadic eye movements revealed by masking",
abstract = "Purpose: Low but not high spatial frequencies are suppressed during saccades (Burr et al., J. Physiol. 1982), probably because of selective suppression of the magnocellular pathway (Burr et al., Nature 1994). Here we investigate further the mechanisms for the suppression, using masking techniques. Methods: Contrast sensitivity for horizontally oriented test grating patches of low spatial frequency (0.07 c/deg) was measured in the presence of continuously displayed, randomly jittering mask gratings of variable contrast and spatial frequency, using a forced-choice procedure. The test gratings were presented briefly (8 ms) during normal vision and during large horizontal saccades. Results: Sensitivity decreased with mask contrast, with a similar (near linear) dependency during normal viewing and during saccades. For both normal and saccadic viewing, maximum reduction in sensitivity occurred when the mask had the same spatial frequency as that of the test (0.07 c/deg), at all levels of mask contrast. Conclusions: That maximum masking occurs at the same spatial frequency of the test implies that mechanisms selective to low spatial frequencies are not totally suppressed during saccades, but continue to operate with reduced sensitivity. This result fits well with the acceleration of the impulse response for luminance but not for chromatic stimuli during saccades (Burr and Morrone, Vision Res. 1996), that may result from gain changes in the magnocellular pathway during saccades.",
author = "David Burr and Stefano Baldassi and Barbara Marconi and Concetta Morrone",
year = "1996",
month = "2",
day = "15",
language = "English",
volume = "37",
journal = "Investigative Ophthalmology and Visual Science",
issn = "0146-0404",
publisher = "Association for Research in Vision and Ophthalmology Inc.",
number = "3",

}

TY - JOUR

T1 - Spatial frequency selectivity during saccadic eye movements revealed by masking

AU - Burr, David

AU - Baldassi, Stefano

AU - Marconi, Barbara

AU - Morrone, Concetta

PY - 1996/2/15

Y1 - 1996/2/15

N2 - Purpose: Low but not high spatial frequencies are suppressed during saccades (Burr et al., J. Physiol. 1982), probably because of selective suppression of the magnocellular pathway (Burr et al., Nature 1994). Here we investigate further the mechanisms for the suppression, using masking techniques. Methods: Contrast sensitivity for horizontally oriented test grating patches of low spatial frequency (0.07 c/deg) was measured in the presence of continuously displayed, randomly jittering mask gratings of variable contrast and spatial frequency, using a forced-choice procedure. The test gratings were presented briefly (8 ms) during normal vision and during large horizontal saccades. Results: Sensitivity decreased with mask contrast, with a similar (near linear) dependency during normal viewing and during saccades. For both normal and saccadic viewing, maximum reduction in sensitivity occurred when the mask had the same spatial frequency as that of the test (0.07 c/deg), at all levels of mask contrast. Conclusions: That maximum masking occurs at the same spatial frequency of the test implies that mechanisms selective to low spatial frequencies are not totally suppressed during saccades, but continue to operate with reduced sensitivity. This result fits well with the acceleration of the impulse response for luminance but not for chromatic stimuli during saccades (Burr and Morrone, Vision Res. 1996), that may result from gain changes in the magnocellular pathway during saccades.

AB - Purpose: Low but not high spatial frequencies are suppressed during saccades (Burr et al., J. Physiol. 1982), probably because of selective suppression of the magnocellular pathway (Burr et al., Nature 1994). Here we investigate further the mechanisms for the suppression, using masking techniques. Methods: Contrast sensitivity for horizontally oriented test grating patches of low spatial frequency (0.07 c/deg) was measured in the presence of continuously displayed, randomly jittering mask gratings of variable contrast and spatial frequency, using a forced-choice procedure. The test gratings were presented briefly (8 ms) during normal vision and during large horizontal saccades. Results: Sensitivity decreased with mask contrast, with a similar (near linear) dependency during normal viewing and during saccades. For both normal and saccadic viewing, maximum reduction in sensitivity occurred when the mask had the same spatial frequency as that of the test (0.07 c/deg), at all levels of mask contrast. Conclusions: That maximum masking occurs at the same spatial frequency of the test implies that mechanisms selective to low spatial frequencies are not totally suppressed during saccades, but continue to operate with reduced sensitivity. This result fits well with the acceleration of the impulse response for luminance but not for chromatic stimuli during saccades (Burr and Morrone, Vision Res. 1996), that may result from gain changes in the magnocellular pathway during saccades.

UR - http://www.scopus.com/inward/record.url?scp=0012022070&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0012022070&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0012022070

VL - 37

JO - Investigative Ophthalmology and Visual Science

JF - Investigative Ophthalmology and Visual Science

SN - 0146-0404

IS - 3

ER -