Maturation of the sensitivity for luminance and contrast modulated patterns during development of normal and pathological human children.
Any object may contain at least two spatio-temporal components referred to as first- and second-order, respectively, defined by spatial-temporal luminance modulation or by contrast, texture or depth modulation. This study investigates form sensitivity of infants, normals, premature or strabismic. A two-alternative forced-choice preferential looking procedure was used in monocular and binocular condition. Maturation profile for both stimuli was similar in the control group. Strabismic infants showed a vertical offset in maturation, which affected the second-order more severely. The pre-term group showed a lag of second-order sensitivity. Our results underline differences between first- and second-order processing.
Thibault
Delphine
D
INSERM, U846, Stem Cell and Brain Research Institute, Department of Integrative Neurosciences, F-69500 Bron, France.
Brosseau-Lachaine
Odile
O
Faubert
Jocelyn
J
Vital-Durand
François
F
D000328:Adult; D000704:Analysis of Variance; D016022:Case-Control Studies; D002648:Child; D002657:Child Development / Q000502:physiology*; D002675:Child, Preschool; D015350:Contrast Sensitivity / Q000502:physiology; D005556:Form Perception / Q000502:physiology*; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D007234:Infant, Premature / Q000502:physiology; D008029:Lighting; D009039:Motion Perception; D010775:Photic Stimulation; D011601:Psychophysics; D012684:Sensory Thresholds / Q000502:physiology; D013285:Strabismus / Q000523:psychology*