Fig. 8.

Examples of cell labeling observed after injections of Texas Red into area 4δc. A–D) Tracings of parasagittal sections showing cells retrogradely labeled in the frontal cortex at 4 different lateralities, ranging from 2.52 to 6.84 mm from the midline, after injection of 0.45 μL of dextran amine-bound Texas Red into area 4δc in cat Prem10. Scale in (A) pertains also to (B–D). E) One of the 2 injection sites in the medial region of area 4δc, located in the dorsal bank of the cruciate sulcus as indicated in (A). F) Dorsal view of the cat cortex showing the approximate laterality of the 4 sections illustrated in (A)–(D): Red circles indicate the approximate sites of entry for the 2 injections into area 4δc. dlPFC, dorsolateral prefrontal cortex; dmPFC, dorsomedial prefrontal cortex; Lat, lateral sulcus; Prs, presylvian sulcus; SS, suprasylvian sulcus.