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Figure 4 | BMC Neuroscience

Figure 4

From: Cholinergic and GABAergic pathways in fly motion vision

Figure 4

GABA-immunoreactive profiles in the Calliphora visual system. A Overview in a horizontal section. Note the GABA-like immunoreactivity around the cross-sectioned profiles of the of the VS-cells' main dendrites in the lobula plate (arrows). Arrowheads indicate cross-sections of GABA immunoreactive profiles from tangential neurons in the medulla, shown also in B. B Perikarya and tangential fibers in the medulla showing GABA-like immunoreactivity in a whole mount preparation (frontal view). C Detailed view of the inner chiasma in a horizontal section observed with phase contrast optics. D Detailed view of a frontal section of the inner chiasma between medulla and lobula plate. Fascicles with fibers projecting directly from the medulla to the lobula plate do not contain profiles with GABA-like immunoreactivity (white arrowheads). Fascicles running perpendicular to the plane of section contain thick GABA-immunoreactive profiles (black arrowheads). These fibers project mainly from the medulla to the lobula. In the lobula plate the profile of a LPTC (black arrow) is associated with GABA immunoreactive varicosities. E Thick profile projecting from the medulla to the lobula. The apparent bifurcation in the lower part of the fiber most likely originates from a different fiber pertaining to another fascicle. C, E: Phase contrast optics. Scale bar in A, B: 50 μm; in C, D: 30 μm; in E: 20 μm

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