Frontal Silver Section 19: y = -6.0

y= -6.0

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The antennal-glomerular tract sweeps outwards into the lateral horn, just ventral to the calyces to which it also provides many terminal collaterals. A small portion of the tract branches around the upper surface of the pedunculus and into protocerebral neuropil beneath the l. ho.

Medially, the protocerebral bridge (pr.br) is well defined, with a loose arrangement of axons (the posterior vertical fascicle; p.v.fasc) appearing to cascade down from its buttresses to each side of the oesophagous.

Laterally, the lobula of the optic lobe supplies bundles of axons to neuropils of the lateral deutocerebrum. Each bundle is supplied by a specific morphological type of small-field lobula projection neuron (lobula columnar neurons) that target discrete central neuropils called optic foci (or optic glomeruli).

NJ Strausfeld, I Vilinsky, and LC Hansen, ARLDN, Tucson

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