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  • Title: Morphology of locust neurosecretory cells projecting into the Nervus corporis allati II of the suboesophageal ganglion.
    Author: Bräunig P, Böhme C, Staufer B.
    Journal: Microsc Res Tech; 1996 Oct 15; 35(3):230-41. PubMed ID: 8956272.
    Abstract:
    The morphology of neurosecretory cells that project from the suboesophageal ganglion into the retrocerebral complex via the Nervus corporis allati II (NCA II) was studied in the migratory locust, Locusta migratoria, using backfilling techniques and intracellular staining. There are two populations of cells located ventrally in the ganglion: an anterior group of four larger cells, and a posterior group of up to 22 smaller cells. Apart from cell body size and position, members of both cell groups have almost all features in common. They show long-lasting soma spikes with large amplitudes typical for arthropod neurosecretory cells. Their dendritic arborisations are found in the same regions of the neuropile. Both types project into the corpora cardiaca and an additional putative neurohaemal region associated with posterior pharyngeal dilator muscles. The axons of the cells bypass the corpora allata, but frequently form putative release sites on the surface of nerve branches in the vicinity of these glands. Finally, using double-labelling techniques, both anterior and posterior cells are shown to be identical with immunoreactive suboesophageal ganglion cells detected in previous studies using antisera directed against either bovine pancreatic polypeptide (BPP) or locustamyotropin II (Lom-MT-II).
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