Extended developmental time course for global visual functions in primates

Research output: Contribution to journalArticle

Abstract

The critical period for visual development is typically considered to coincide with the time period over which visual acuity develops. Recent studies in monkeys and humans have shown that some visual functions have different critical periods and some, such as Vernier acuity and contour integration, develop more slowly and over a much longer period of time than simple grating acuity. We studied visual functions that require integration of information over space and time and compared their development to that for basic spatial vision tasks in Macaca nemestrina. The results show that visual development continues over a longer period of time than was previously thought. We studied three types of global visual functions: contour integration, motion discrimination, and form discrimination. Contour integration was measured by detection of the location of a coherent ring of Gabor patches in a field of randomly-arrayed and oriented Gabors. Motion discrimination was tested by detection, and discrimination of the direction, of motion in random dot kinematograms. Form discrimination was tested by detection of linear, concentric, or radial organization in Glass patterns. Contrast sensitivity functions were measured for comparison. The animals were tested at ages ranging from 3 weeks to adult. Contour integration ability develops late and over a longer period of time compared to contrast sensitivity. While contrast sensitivity is adult-like by 9-12 months, contour integration develops beginning around 4 months and continues over 1.5-2 years. Motion discrimination ability is apparent within the first 3 postnatal weeks, but develops over a long time course up to about 3 years of age. Form discrimination is relatively difficult for the animals. This ability, like contour integration, develops late, but continues to improve over several years. The data show that complex visual functions develop over a much longer period of time than the classical critical period.

Original languageEnglish (US)
JournalJournal of Vision
Volume2
Issue number10
DOIs
StatePublished - 2002

Fingerprint

Primates
Contrast Sensitivity
Aptitude
Macaca nemestrina
Discrimination (Psychology)
Visual Acuity
Haplorhini
Glass
Critical Period (Psychology)

Keywords

  • Normal and abnormal development

ASJC Scopus subject areas

  • Ophthalmology

Cite this

@article{2254ee8c0db04ce68d26d7b41ee1cde5,
title = "Extended developmental time course for global visual functions in primates",
abstract = "The critical period for visual development is typically considered to coincide with the time period over which visual acuity develops. Recent studies in monkeys and humans have shown that some visual functions have different critical periods and some, such as Vernier acuity and contour integration, develop more slowly and over a much longer period of time than simple grating acuity. We studied visual functions that require integration of information over space and time and compared their development to that for basic spatial vision tasks in Macaca nemestrina. The results show that visual development continues over a longer period of time than was previously thought. We studied three types of global visual functions: contour integration, motion discrimination, and form discrimination. Contour integration was measured by detection of the location of a coherent ring of Gabor patches in a field of randomly-arrayed and oriented Gabors. Motion discrimination was tested by detection, and discrimination of the direction, of motion in random dot kinematograms. Form discrimination was tested by detection of linear, concentric, or radial organization in Glass patterns. Contrast sensitivity functions were measured for comparison. The animals were tested at ages ranging from 3 weeks to adult. Contour integration ability develops late and over a longer period of time compared to contrast sensitivity. While contrast sensitivity is adult-like by 9-12 months, contour integration develops beginning around 4 months and continues over 1.5-2 years. Motion discrimination ability is apparent within the first 3 postnatal weeks, but develops over a long time course up to about 3 years of age. Form discrimination is relatively difficult for the animals. This ability, like contour integration, develops late, but continues to improve over several years. The data show that complex visual functions develop over a much longer period of time than the classical critical period.",
keywords = "Normal and abnormal development",
author = "Lynne Kiorpes and Movshon, {J. Anthony}",
year = "2002",
doi = "10.1167/2.10.47",
language = "English (US)",
volume = "2",
journal = "Journal of Vision",
issn = "1534-7362",
publisher = "Association for Research in Vision and Ophthalmology Inc.",
number = "10",

}

TY - JOUR

T1 - Extended developmental time course for global visual functions in primates

AU - Kiorpes, Lynne

AU - Movshon, J. Anthony

PY - 2002

Y1 - 2002

N2 - The critical period for visual development is typically considered to coincide with the time period over which visual acuity develops. Recent studies in monkeys and humans have shown that some visual functions have different critical periods and some, such as Vernier acuity and contour integration, develop more slowly and over a much longer period of time than simple grating acuity. We studied visual functions that require integration of information over space and time and compared their development to that for basic spatial vision tasks in Macaca nemestrina. The results show that visual development continues over a longer period of time than was previously thought. We studied three types of global visual functions: contour integration, motion discrimination, and form discrimination. Contour integration was measured by detection of the location of a coherent ring of Gabor patches in a field of randomly-arrayed and oriented Gabors. Motion discrimination was tested by detection, and discrimination of the direction, of motion in random dot kinematograms. Form discrimination was tested by detection of linear, concentric, or radial organization in Glass patterns. Contrast sensitivity functions were measured for comparison. The animals were tested at ages ranging from 3 weeks to adult. Contour integration ability develops late and over a longer period of time compared to contrast sensitivity. While contrast sensitivity is adult-like by 9-12 months, contour integration develops beginning around 4 months and continues over 1.5-2 years. Motion discrimination ability is apparent within the first 3 postnatal weeks, but develops over a long time course up to about 3 years of age. Form discrimination is relatively difficult for the animals. This ability, like contour integration, develops late, but continues to improve over several years. The data show that complex visual functions develop over a much longer period of time than the classical critical period.

AB - The critical period for visual development is typically considered to coincide with the time period over which visual acuity develops. Recent studies in monkeys and humans have shown that some visual functions have different critical periods and some, such as Vernier acuity and contour integration, develop more slowly and over a much longer period of time than simple grating acuity. We studied visual functions that require integration of information over space and time and compared their development to that for basic spatial vision tasks in Macaca nemestrina. The results show that visual development continues over a longer period of time than was previously thought. We studied three types of global visual functions: contour integration, motion discrimination, and form discrimination. Contour integration was measured by detection of the location of a coherent ring of Gabor patches in a field of randomly-arrayed and oriented Gabors. Motion discrimination was tested by detection, and discrimination of the direction, of motion in random dot kinematograms. Form discrimination was tested by detection of linear, concentric, or radial organization in Glass patterns. Contrast sensitivity functions were measured for comparison. The animals were tested at ages ranging from 3 weeks to adult. Contour integration ability develops late and over a longer period of time compared to contrast sensitivity. While contrast sensitivity is adult-like by 9-12 months, contour integration develops beginning around 4 months and continues over 1.5-2 years. Motion discrimination ability is apparent within the first 3 postnatal weeks, but develops over a long time course up to about 3 years of age. Form discrimination is relatively difficult for the animals. This ability, like contour integration, develops late, but continues to improve over several years. The data show that complex visual functions develop over a much longer period of time than the classical critical period.

KW - Normal and abnormal development

UR - http://www.scopus.com/inward/record.url?scp=4143072562&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=4143072562&partnerID=8YFLogxK

U2 - 10.1167/2.10.47

DO - 10.1167/2.10.47

M3 - Article

VL - 2

JO - Journal of Vision

JF - Journal of Vision

SN - 1534-7362

IS - 10

ER -