Dorsolateral Prefrontal Cortex (DLPFC) Activity during Visual Processing.

(A) Group statistical maps (p<0.01) show strong ERS responses in the right DLPFC of uninfected controls (top row) and strong ERD activity in the same neural regions of HIV-infected patients (bottom row). Thus, visual stimulation elicited activity in opposite directions within the DLPFC and other regions of patients and controls. Color scale bars indicate t-statistical values. (B) A -rendition showing neural regions where significant (p<0.01, corrected) group differences were detected during visual processing. As shown, HIV-infected patients exhibited strong reductions in neuronal responses between 6–12 Hz in the right DLPFC, right frontal eye fields (not shown), and a small area of the inferior posterior cingulate. All images are shown in radiological convention (R = L). Blue: ERD, Orange: ERS.