Figure 5.

Cue and target responses in area V8. Left column shows BOLD response time course estimates (beta weights) in V8. The solid and checkered gray bars represent the cue and target presentations, respectively. The right column shows the amplitude of cue responses averaged over the three TRs centered on the peak of the hemodynamic responses (see “Materials and methods”). All individual target responses are significantly different from the zero baseline. For the cue responses, although smaller than observed in MT, here in V8 the responses are also significantly different from the zero baseline expect for the cue response in the general dimension motion trials (see panel B). (A) Hemodynamic responses collapsed across specific feature and general dimension trials for motion and color cues and targets in V8. Unlike for MT (see Figure 4) there was no significant difference in target processing with attention (attending for color vs. motion) in V8. (B) Hemodynamic responses for motion specific feature and general dimension cues and targets in V8. (C) Hemodynamic responses for color specific feature and general dimension cues and targets in V8.