FIG. 6.

Complex timing of transient responses in infant V1 and V2. A: methods to measure onset latency and time-to-peak (time required for response to reach 95% of the peak from onset), and time constant. Top: raster plot of responses in an adult complex V2 cell during the first 200 ms of 640-ms stationary stimulus presentation. Bottom: PSTH for the same unit. See the text for details. B: frequency histograms of onset latencies in individual V1 (left) and V2 (right) units in 2 (top)- and 4-wk-old (middle) infants and adults (bottom). |, median onset latency. C: frequency histograms of time-to-peak latencies and median values for infants and adults. D: frequency histograms of time constants and median values for infants and adults.