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Titolo:
Development of spatial and temporal vision during childhood
Autore:
Ellemberg, D; Lewis, TL; Liu, CH; Maurer, D;
Indirizzi:
McMaster Univ, Dept Psychol, Hamilton, ON L8S 4K1, Canada McMaster Univ Hamilton ON Canada L8S 4K1 ol, Hamilton, ON L8S 4K1, Canada Hosp Sick Children, Toronto, ON M5G 1X8, Canada Hosp Sick Children Toronto ON Canada M5G 1X8 Toronto, ON M5G 1X8, Canada Univ Toronto, Toronto, ON, Canada Univ Toronto Toronto ON CanadaUniv Toronto, Toronto, ON, Canada
Titolo Testata:
VISION RESEARCH
fascicolo: 14, volume: 39, anno: 1999,
pagine: 2325 - 2333
SICI:
0042-6989(199907)39:14<2325:DOSATV>2.0.ZU;2-#
Fonte:
ISI
Lingua:
ENG
Soggetto:
LATERAL GENICULATE-NUCLEUS; HUMAN CONTRAST SENSITIVITY; HUMAN INFANTS; YOUNG-CHILDREN; VISUAL-ACUITY; PATTERN ELECTRORETINOGRAM; PREFERENTIAL LOOKING; SYNAPSE ELIMINATION; FULL-TERM; CORTEX;
Keywords:
children; development; spatial contrast sensitivity; grating acuity; temporal contrast sensitivity; critical flicker fusion frequency;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
54
Recensione:
Indirizzi per estratti:
Indirizzo: Lewis, TL McMaster Univ, Dept Psychol, 1280 Main St W, Hamilton, ON L8S 4K1, Canada McMaster Univ 1280 Main St W Hamilton ON Canada L8S 4K1 , Canada
Citazione:
D. Ellemberg et al., "Development of spatial and temporal vision during childhood", VISION RES, 39(14), 1999, pp. 2325-2333

Abstract

Using the method of limits, we measured the development of spatial and temporal vision beginning at 4 years of age. Participants were adults, and children aged 4, 5, 6, and 7 years (n = 24 per age). Spatial vision was assessed with vertical sine-wave gratings, and temporal vision was assessed with an unpatterned luminance held sinusoidally modulated over time. Under thesetesting conditions, spatial contrast sensitivity at every frequency increased by at least 0.5 log units between 4 and 7 years of age, at which point it was adult-like. Grating acuity reached adult values at 6 years of age. Temporal vision was more mature: at 4 years of age temporal contrast sensitivity at higher temporal frequencies (20 and 30 Hz) and critical flicker fusion frequency were already adult-like. Sensitivity at lower temporal frequencies (5 and 10 Hz) increased by 0.25 log units after the age of 4 to reachadult levels at age 7. The results suggest that temporal vision matures more rapidly than spatial vision during childhood. Thus, spatial and temporalvision are likely mediated by different underlying neural mechanisms that mature at different rates. (C) 1999 Elsevier Science Ltd. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 25/11/20 alle ore 18:51:39