Retrogradely labeled neurons in the Ov complex and surrounding area following CTB
injections into forebrain areas. The three left columns are single channel
confocal images of CTB, immunoreactivity for CCK, and DIC, respectively. The far
right column is the merged images of CTB and CCK. A–C,
Retrogradely labeled neurons in Ov are located inside of or overlapped with the
cOv indicated by CCK-immunoreactive cells, following injections into the Field
L. Double-labeled cells were occasionally seen (Insert in A; arrowhead).
D, Retrogradely labeled neurons are located outside of the cOv
indicated by CCK-immunoreactive cells, following injections into the nucleus
taenia of the arcopallium. E, Higher magnification images of the
same case in D. The location is comparable to the box in D. No double-labeled
cells were found. The dorsal is up and the right is medial. Abbreviations: see
table of abbreviations. Scale bar = 500 μm.