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Titolo:
VISUAL AGING - UNSPECIFIC DECLINE OF THE RESPONSES TO LUMINANCE AND COLOR
Autore:
FIORENTINI A; PORCIATTI V; MORRONE MC; BURR DC;
Indirizzi:
UNIV ROMA LA SAPIENZA,DIPARTIMENTO PSICOL I-00185 ROME ITALY CNR,IST NEUROFISIOL I-56100 PISA ITALY
Titolo Testata:
Vision research
fascicolo: 21, volume: 36, anno: 1996,
pagine: 3557 - 3566
SICI:
0042-6989(1996)36:21<3557:VA-UDO>2.0.ZU;2-H
Fonte:
ISI
Lingua:
ENG
Soggetto:
DISCRIMINATION DETECTION RATIOS; CONTRAST SENSITIVITY; CHROMATIC PROPERTIES; TEMPORAL FREQUENCY; LIGHT SCATTER; RED-GREEN; MOTION; VISION; GRATINGS; ISOLUMINANCE;
Keywords:
AGING; COLOR; MOTION; EVOKED-POTENTIAL; SPATIOTEMPORAL FREQUENCY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
44
Recensione:
Indirizzi per estratti:
Citazione:
A. Fiorentini et al., "VISUAL AGING - UNSPECIFIC DECLINE OF THE RESPONSES TO LUMINANCE AND COLOR", Vision research, 36(21), 1996, pp. 3557-3566

Abstract

We have investigated whether ageing affects selectively the responsesto equiluminant patterns of pure colour contrast, In two groups of subjects (mean ages 29 and 72 yr) contrast thresholds were measured psychophysically for the detection and for the discrimination of the direction of motion of drifting gratings, The gratings were modulated either in pure luminance contrast (and uniform colour), or pure chromatic contrast (red-green equiluminant gratings), In subjects of the same agegroups, visual evoked potentials (VEP) were recorded in response to gratings with either pure luminance contrast or pure colour contrast sinusoidally reversed in contrast at various temporal frequencies, It was shown that psychophysical contrast sensitivity for equiluminant patterns deteriorates significantly with age, and VEP latency increases, However, these effects of ageing on the responses to patterns of pure colour contrast are substantially the same as those observed in the same subjects for stimuli with pure luminance contrast. The results suggest that ageing causes a small and unspecific decline of the response of the visual system to luminance and colour contrast. Copyright (C) 1996 Elsevier Science Ltd.

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Documento generato il 02/07/20 alle ore 22:15:28