Assessing the Contribution of the Oscillatory Potentials to the Genesis of the Photopic ERG with the Discrete Wavelet Transform

Figure 2

Normal ERGs (obtained at four different stimulus intensities) which show a relatively constant %OPs contribution (from (a) to (d): 58.7%; 57.8%; 56.5%; 59.4%). The four examples are shown in increasing order of stimulus intensities from panels (a) to (d). The DWT scalograms are shown at the top of each broadband ERG. Sections of the scalogram that were not considered in the %OPs computation were shaded to facilitate comparison. The descriptors (20b, 40b, 80ops, and 160ops) that were used to compute the %OPs are identified on each scalogram. (e) Normalized luminance-response functions of the DWT descriptors of the b-wave (20b + 40b) and OPs (80ops + 160ops). The red markers refer to the intensities shown from panels (a) to (d). (f) Mean ± SD %OPs values obtained at each stimulus intensity.