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

Figure 4

Pathological ERGs (obtained from four different end-stage RP patients) which show a significantly higher %OPs contribution. The four cases are shown in increasing order of %OPs from panels (a) to (d). In each case, the DWT scalogram is shown on the top of the broadband ERGs. Temporal sections of the scalogram that were not considered in the %OPs computation were shaded to ease appreciation for the region in question. The descriptors (20b, 40b, 80ops, and 160ops) that were used to compute the %OPs are shown on each scalogram. The %OPs is shown at the top of each DWT scalogram.

(a)

(b)

(c)

(d)