An Attention-Sensitive Memory Trace in Macaque MT Following Saccadic Eye Movements
Fig 2
Attentional enhancement of MT neuronal responses to moving RDPs.
(A,B) Population average peristimulus time histograms (PSTHs) for monkey H (A) and monkey E (B) in response to attended (target) and unattended (distractor) RDPs moving either in the preferred (P) or antipreferred (AP) direction (see legend at top left). The PSTH for the simple-saccade task is also shown in black as a reference. Solid vertical lines demarcate the time window used for computing the modulation indices in C–F. The dotted vertical line indicates the mean time of saccade onset. (C,E) Frequency polygons of the distribution of modulation indices in monkey H (C) and monkey E (E) when the preferred direction RDP is in the RF after the saccade show a clear predominance of values greater than zero, i.e., an enhanced response in the attend-in conditions. The p-value from the signed-rank test of the modulation indices and the median modulation index (converted to a percentage and rounded) are shown on the top right of each panel. The final point in the frequency polygons sums all data values at or beyond the extreme value. (D,F) Same as C,E but for the antipreferred direction RDP. Data in Supporting Information (S1 Data).