Life and Medical Sciences
Cell & Developmental Biology
Wiley InterScience Backfile Collection 1832-2000
A cardiaca-allatal commissural plexus (CACP) lies between and partly overlapping the postcommissural lobes of the corpora cardiaca (CC), the nervi corpori allati I (NCA I) and the corpora allata (CA). CACP, which is often continuous posteriorly with a complicated postallatal plexus (PAP), comprises a variable number of connectives with neurosecretory processes linking the cardiaca-commissural organ or dorsal cardiac commissure (containig tritocerebral fibres) to the NCA I. the allatal commissure and the CA. Neurosecretory processes are exchanged between the two halves of the cephalic neuroendocrine complex (CNC) both intracerebrally at different locales, possibly to ensure functional synchrony of CNC components.NCA I and CACP are drawn out with their stroma to varying extents over the CA. Histophysiological evidence suggests that part of the stainable secretion stored in, and or in axonal transit through CA may be released through CA surface; NCA I, the nervi cardiostomatogastrici, CACP, perhaps also NCA II may function as neurohaemal areas. A “directed” neurosecretory pathway could be distinguished from PAP to the foregut and the fat body. The degree of spatial intimacy detected between neurosecretory and stomatogastric components of CNC suggests that the two systems may function in an integrated fashion. The recurrent-oesophageal nerve complex serves not only for a direct transport of neurosecretion, but also as one of the sites of its release.
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