Maturation of the electroretinogram in children: stability of the amplitude ratio a/b.
We report the method and results of mesopic electroretinogram (ERG) recording by corneal electrode in 75 children aged from 0 to 15 years. This method gives an overall evaluation of the electrical activity of the retina in a rapid and acceptable manner, in the awake state and without sedation. The a- and b-waves were present at birth. The amplitude of these waves increased considerably throughout the period studied. The decrease in latencies was statistically significant only for the b-wave between birth and 6 months. The presence of oscillatory potentials increased with age. The amplitude ratio a/b remained constant at about 0.25 in all age groups. This a/b ratio thus constitutes, under the recording conditions described, a criterion of normality that is independent of age.
Laboratoire de Neurophysiologie Clinique de I'Enfant, Hôpital Armand-Trousseau, Paris, France.
R
R
Flores-Guevara
F
F
Renault
C
C
Ostré
P
P
Richard
D000293:Adolescent; D000367:Age Factors; D002648:Child; D002657:Child Development; D002675:Child, Preschool; D004596:Electroretinography; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D011930:Reaction Time / Q000502:physiology; D012160:Retina / Q000502:physiology*