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  • Title: Vasopressinergic axon collaterals and axon terminals in the magnocellular neurosecretory nuclei of the rat hypothalamus.
    Author: Ray PK, Choudhury SR.
    Journal: Acta Anat (Basel); 1990; 137(1):37-44. PubMed ID: 2305628.
    Abstract:
    Axon collaterals emerging from the vasopressinergic neurons of the supraoptic (SON) and paraventricular (PVN) nuclei and recurving back towards their respective nuclei have been previously reported. Since such axon collaterals can play a role in the neuromodulation of SON and PVN, these nuclei have been further investigated immunohistochemically under the light and electron microscope. The PAP technique, using a commercial antibody, was employed. Vasopressin-positive axon collaterals were seen to recurve towards their nuclei of origin. In the latter, vasopressinergic intrinsic neurons were also observed. Under the electron microscope, axon terminals containing vasopressin-immunoreactive neurosecretory granules were noted. Such terminals presumably arise from the vasopressin-positive recurrent axon collaterals or from the intrinsic neurons for the purpose of neuromodulation within the SON and PVN.
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