caa a22 4500 465794866 CHVBK 20180323112034.0 cr unu---uuuuu 170327e19901101xx s 000 0 eng 10.1007/BF00140502 doi (NATIONALLICENCE)springer-10.1007/BF00140502 Results with multichannel topographical bipolar recordings of the visual evoked potential in normals and amblyopes [Elektronische Daten] [Volker Schippers, Jiri Silny, Günter Rau, Christian Teping] The method currently used to record topographical voltage distributions of visual evoked potentials is that of monopolar recording with respect to some arbitrary reference electrode. As an alternative we investigated the method of bipolar topographical recording of the checkerboard reversal evoked potential in four amblyopic patients and ten normal persons. The recordings were performed with a system of 14 bipolar channels, arranged in a rectangular grid with an interelectrode distance of 15% of the inion-nasion distance and centered 3 cm above the inion. The gradient distributions of the visual evoked potential obtained from normal persons showed at the time of component P2 a maximum about 3 cm above the inion. The healthy eyes of the amblyopic patients showed similar distributions and latencies. The amblyopic eyes showed normal or reduced amplitudes and normal or increased latencies with large checks and low amplitudes with smaller checks. The topographical distributions recorded with the bipolar recording system showed shifts of the maxima with the larger patterns in three of four amblyopic eyes. A technical comparison showed that these shifts can be recorded by the bipolar recording method with higher accuracy than with the monopolar method, promising a better understanding and more accurate diagnosis of amblyopia. Kluwer Academic Publishers, 1990 Amblyopia nationallicence bipolar recordings nationallicence multichannel recordings nationallicence visual evoked potentials nationallicence Schippers Volker Helmholtz-Institute for Biomedical Engineering, Aachen, FRG aut Silny Jiri Helmholtz-Institute for Biomedical Engineering, Aachen, FRG aut Rau Günter Helmholtz-Institute for Biomedical Engineering, Aachen, FRG aut Teping Christian University Clinic of Ophthalmology, Aachen, Germany aut Documenta Ophthalmologica Kluwer Academic Publishers 76/1(1990-11-01), 91-101 0012-4486 76:1<91 1990 76 10633 https://doi.org/10.1007/BF00140502 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00140502 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Schippers Volker Helmholtz-Institute for Biomedical Engineering, Aachen, FRG aut NATIONALLICENCE 700 1- Silny Jiri Helmholtz-Institute for Biomedical Engineering, Aachen, FRG aut NATIONALLICENCE 700 1- Rau Günter Helmholtz-Institute for Biomedical Engineering, Aachen, FRG aut NATIONALLICENCE 700 1- Teping Christian University Clinic of Ophthalmology, Aachen, Germany aut NATIONALLICENCE 773 0- Documenta Ophthalmologica Kluwer Academic Publishers 76/1(1990-11-01), 91-101 0012-4486 76:1<91 1990 76 10633 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer