2002
DOI: 10.1097/00001756-200205070-00021
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Dorsal and ventral stream sensitivity in normal development and hemiplegia

Abstract: Form and motion coherence thresholds can provide comparable measures of global visual processing in the ventral and dorsal streams respectively. Normal development of thresholds was tested in 360 normally developing children aged 4-11 and in normal adults. The two tasks showed similar developmental trends, with some greater variability and a slight delay in motion coherence compared to form coherence performance, in reaching adult levels. To examine the proposal of dorsal stream vulnerability related to specif… Show more

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Cited by 178 publications
(175 citation statements)
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“…The difference in adult levels of performance between monkeys and humans could be due to task differences, though we have often found monkeys' performance on motion-detection tasks to be superior to humans' (unpublished observations). The long, slow time course of motion-sensitivity development that we found is consistent with a study in humans showing continued improvement in coherence threshold up to about age 10 (Gunn et al, 2002).…”
Section: Discussionsupporting
confidence: 92%
“…The difference in adult levels of performance between monkeys and humans could be due to task differences, though we have often found monkeys' performance on motion-detection tasks to be superior to humans' (unpublished observations). The long, slow time course of motion-sensitivity development that we found is consistent with a study in humans showing continued improvement in coherence threshold up to about age 10 (Gunn et al, 2002).…”
Section: Discussionsupporting
confidence: 92%
“…The magnocellular pathway is clearly implicated in motion perception, whereas the parvocellular pathway is thought to be more important for visual acuity and form. This would be consistent with the fact that spatial acuity and contrast sensitivity were normal for G.B., and the fact that previous research has shown that PVL patients tend to show a motion rather than a form perception deficit (Gunn et al, 2002).…”
Section: Discussionsupporting
confidence: 88%
“…By 3 months of age, infants typically demonstrate visual sensitivity to translation direction (Wattam-Bell, 1994) and contraction (Shirai, Kanazawa, & Yamaguchi, 2006) in random dot patterns in which 50% of the dots move together coherently. Between the ages of 7 and 9 years, typical observers can detect coherent motion in random dot displays when approximately 20% of the dots move coherently (Gunn et al, 2002;Raymond & Sorensen, 1998;Spencer et al, 2000). By 10 years of age, typical observers demonstrate motion coherence thresholds that do not differ from adult thresholds (Spencer et al, 2000).…”
Section: Interpreting Apparently Divergent Resultsmentioning
confidence: 96%