Neurosekretion of brain and brain- connected endocrin glands in the decticus verrucivorus (orthoptera: tettigonidae)

Abstract

This morphologic and histologic study was performed to determine the types and places of the median and lateralneurosecretory cells in the pars intercerebralis (PIC) area of protocerebrum in the brain of mature female Decticus verrucivorus;corpora cardiac, corpora allata and nerve connections among corpora cardiaca, corpora allata and the brain. The obtained findingswere compared with studies on other species of Orthoptera ordo and pars intercerebralis median neurosecretion cell types wereinvestigated. Total staining was performed by using performic asit-victoria blue 4R (PAVB) tecnique and pars intercerebralismedian neurosecretion cells and corpora cardiaca were staining dark blue. Occasionally, neurosecretory granuls were also seen incorpora allata. It was clearly observed that passing through the brain, axon bundles ascended from both median neurosecretion cellgroups constituted a cross in ventral. Four types of neurosecretion cells were determined in pars intercerebralis median group andwere defined as Type I, Type II, Type III, and Type IV cells, respectively.