Lateral parts of the DLL, which receive afferents from the retina, project upon
the medial wulst and Cluster N (shown in white).
Each input source (retina, red;
medial wulst, blue; Cluster N, green) and their overlapping tracing patterns are color - coded separately.
By comparing the retrograde tracing patterns from Cluster N to those from
the medial wulst, lateral-most parts of the DLL were shown to innervate both the medial and lateral visual wulst regions and to co-localize with fibers anterogradely traced from the retina (Fig. 2A, shown in white).
Not exact matches
B: Retrograde tracing pattern from the
medial visual
wulst, ipsilateral side.
To differentiate Cluster N connectivity from those of the rest of the visual
wulst, three birds underwent tracer application into
wulst areas
medial to Cluster N at the same rostro - caudal level.
In contrast, the DLAmc and dorsal parts of the DLL exclusively showed overlap between tracer from the retina and neurons innervating the
medial visual
wulst (Fig. 2A, shown in magenta), whereas overlap between retinofugal fibers and neurons projecting only upon Cluster N was observed in ventral parts of the DLL and parts of the LdOPT and SpRt (Fig. 2A, shown in yellow).
Afferents to the visual
wulst were mapped by stereotactic iontophoretic application (4 µA positive current, 7 sec on / off, duration: 20 — 30 min) of biotinylated dextran amin (BDA, working dilution: 10 % in phosphate buffered saline, PBS; Molecular Probes Europe BV, Leiden, The Netherlands) into Cluster N or into
medial parts of the visual
Wulst.