All major neuropil regions are labeled by 5-HT antiserum except the optic lobes, antennal lobes and calyces of mushroom bodies, which are almost devoid of 5-HT immunoreactivity.

• 在整个脑区，视叶、触角叶和蕈形体冠三个神经纤维网对5-HT抗血清的反应最弱，几乎不被5-HT抗血清所标记。