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. 1998 May;5(1):78–89.

Figure 2.

Figure 2

RDL-like GABA receptors in the cricket protocerebrum. (A) Frontal section through the calyces of mushroom bodies. The central part of the anterior calyces (AC) is strongly labeled as well as the two arms of the posterior calyces (arrowheads). (B) Sagittal section through the mushroom body. An intense immunoreactivity is present at the entrance of the peduncle into the anterior calyx (AC), as well as in the arm (arrow) of the posterior calyx (PC). Note that the strong peripheral labeling observed in the peduncle (P) disappears in the distal portion of this region of the mushroom body. (C) Frontal section through the proximal part of the peduncle (P). Two concentric rings that are strongly immunoreactive surround the peduncle. No label is detected in the protocerebral bridge (PB). Two immunoreactive neurons are visible at the margin of the pars intercerebralis (PI). (D) Frontal section showing the central body. Immunoreactive profiles are present in the isthmus tract (IT) and in the nerve bundles passing to the ellipsoid body (EB). Some labeled processes appear in the subcentral body commissure (SCBCo). (E) Frontal section posterior to C. Immunoreactivity is less intense at the periphery of the posterior peduncle (P) (compare with Fig. 3C). The noduli (N) of the central complex, visible under the fan-shaped body (FSB) lack immunoreactivity. (F) Frontal section posterior to D. Immunoreactive processes appear between the columns of the fan-shaped body (FSB). The ellipsoid body (EB), and the isthmus tract (IT) are labeled. (G,H) Frontal section of the α and β lobes of mushroom body. Note the heterogeneous distribution of immunoreactivity in the lobes. In the α lobe, the unstained core channel is surrounded by immunoreactive processes parallel to its main axis. Strongly labeled fibers are present at the margins of the ventral part of the β lobe. The dorsal part of the β lobe is free of any labeling (arrowheads). Immunoreactive processes are present in the median bundle (arrow). Densely immunostained fiber fascicles (H) are projecting between the two lobes of mushroom bodies. (A–H) Bars, 50 μm.