Aging of the chromatic onset visual evoked potential.
Optom Vis Sci
; 78(6): 442-6, 2001 Jun.
Article
en En
| MEDLINE
| ID: mdl-11444635
ABSTRACT
PURPOSE:
To examine changes in the chromatic onset visual evoked potential (VEP) as a function of aging.METHODS:
VEP's were measured in response to chromatic sinusoidal gratings (1.0 and 0.5 cpd), selectively chosen to modulate the L-M channel and S - (L+M) channel and presented in onset-offset mode. Responses to achromatic gratings presented in a reversal mode were also measured. Twenty subjects were tested, ranging in age from 21 to 93 years.RESULTS:
Unlike changes observed earlier in life, the general shape of the chromatic onset wave-form changed little with age; however, latencies increased significantly as a function of age. Amplitude changes revealed a decreasing trend that was not statistically significant. There was little change in the achromatic responses with age.CONCLUSIONS:
Our results demonstrate a systematic slowing of the chromatic onset VEP with age. The gradual nature of the latency changes and the lack of dramatic and complex wave-form shape changes may allow development of age-based normative data for use in clinical settings.
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Banco de datos:
MEDLINE
Asunto principal:
Envejecimiento
/
Percepción de Color
/
Potenciales Evocados Visuales
Límite:
Adult
/
Aged
/
Aged80
/
Humans
/
Middle aged
Idioma:
En
Año:
2001
Tipo del documento:
Article