M- and L-cones in early infancy: II. Action spectra at 8 weeks of age.
Vision Res
; 38(12): 1765-73, 1998 Jun.
Article
em En
| MEDLINE
| ID: mdl-9797955
ABSTRACT
Field sensitivities were measured under conditions of M- and L-cone isolation for seven infants (8-12 weeks-old) and two adults, using silent-substitution and the visually evoked potential (VEP). The efficacy of the receptor-isolation conditions were first verified by measuring psychophysical and VEP-derived action spectra from two color-normal adults under conditions of M- and L-cone isolation. M- and L-cone action spectra obtained from the two methods were found to be similar to the Smith and Pokorny M- and L-cone fundamentals, respectively. The VEP-derived action spectra obtained from infants and adults were well fit by the Smith and Pokorny M- and L-cone fundamentals. These data, in conjunction with our previous study, confirm that M- and L-cones are operating by 8 weeks and possibly as early as 4 weeks of age.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Percepção de Cores
/
Células Fotorreceptoras Retinianas Cones
/
Potenciais Evocados Visuais
Limite:
Adult
/
Female
/
Humans
/
Infant
Idioma:
En
Revista:
Vision Res
Ano de publicação:
1998
Tipo de documento:
Article
País de afiliação:
Estados Unidos