The neurosecretory system of the adult Melanogryllus desertus Pall. (Orthoptera, Gryllidae). II. Cerebral neurohemal area.

The cerebral neurohemal area of Melanogryllus desertus is located posteriorly among the neurons of nervus corporis cardiaci I (NCCI) on the ventral median surface of the protocerebrum where axons penetrate the neural lamella and terminate on its outer surface. Numerous neurosecretory fibers containing three different types of granule occur within and on the outer surface of the neural lamella. The release of neurosecretory granules is accomplished by exocytosis and the formation of synaptoids. It can also take place as a mass release of granules into the stroma.