caa a22 4500 465794696 CHVBK 20180323112034.0 cr unu---uuuuu 170327e19900801xx s 000 0 eng 10.1007/BF00142592 doi (NATIONALLICENCE)springer-10.1007/BF00142592 The human focal electroretinogram as a function of stimulus area [Elektronische Daten] [Pierangelo Errico, Benedetto Falsini, Vittorio Porciatti, Francesco CefalÁ] Focal electroretinograms to on-off luminance modulation (2.7 Hz) of uniform fields with a different area (144-2.25 deg2) centered on the fovea were recorded in two young normal subjects. The electroretinogram responses typically consisted of an a-wave, a b-wave, a PIII component and a d-wave. The concentric reduction of the test field size caused progressive amplitude decrement of all components, while their response density increased. The spatial summation properties of the b-wave differed from those of the a-wave, PIII component and d-wave so that the relative contribution of the b-wave to the electroretinogram waveform depended on the stimulus area. For a critically small field size, the electroretinogram was dominated by the PIII and d-wave components. Only these two electroretinogram components displayed a density profile that could be compared with that of cone distribution. Kluwer Academic Publishers, 1990 b-wave nationallicence d-wave nationallicence electroretinogram components nationallicence PIII component nationallicence spatial summation nationallicence Errico Pierangelo Institute of Human Physiology, Catholic University, Rome, Italy aut Falsini Benedetto Eye Clinic, Catholic University, Rome, Italy aut Porciatti Vittorio Institute of Neurophysiology, CNR, Pisa, Italy aut CefalÁ Francesco Eye Clinic, Catholic University, Rome, Italy aut Documenta Ophthalmologica Kluwer Academic Publishers 75/1(1990-08-01), 41-48 0012-4486 75:1<41 1990 75 10633 https://doi.org/10.1007/BF00142592 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00142592 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Errico Pierangelo Institute of Human Physiology, Catholic University, Rome, Italy aut NATIONALLICENCE 700 1- Falsini Benedetto Eye Clinic, Catholic University, Rome, Italy aut NATIONALLICENCE 700 1- Porciatti Vittorio Institute of Neurophysiology, CNR, Pisa, Italy aut NATIONALLICENCE 700 1- CefalÁ Francesco Eye Clinic, Catholic University, Rome, Italy aut NATIONALLICENCE 773 0- Documenta Ophthalmologica Kluwer Academic Publishers 75/1(1990-08-01), 41-48 0012-4486 75:1<41 1990 75 10633 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer