Figure 4
From: Internal receptors in insect appendages project directly into a special brain neuropile
Projections from maxillary and antennal nerves. Fibres projecting into the superficial ventral inferior protocerebrum (SVIP) as seen after filling nerves of head appendages (anaglyphs for viewing with red/green glasses; midline of brain indicated by broken line). A Projections into the SVIP (arrow) after staining the maxillary palp nerve. Massive projections of palpus chemosensory afferents in the deutocerebrum (DC) are also stained (those in the tritocerebrum are out of the focal plane). B Projections after filling one of the two major branches of the antennal nerve in the distal flagellum. Apart from projections in the antennal lobe (AL) of the deutocerebrum a few fibres project into the protocerebral SVIP (arrows). Scales: 200 μm.