Article1978

EXTRAHYPOTHALAMIC NEUROPHYSIN-CONTAINING PERIKARYA, FIBER PATHWAYS AND FIBER CLUSTERS IN THE RAT BRAIN

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Neuroendocrine regulation and behavior Neuropeptides and Animal Physiology Hypothalamic control of reproductive hormones

Abstract

Immunoreactive neurophysin (Np) is demonstrated by the immunoperoxidase technique not only within neurones of the classical hypothalamo-neurohypophyseal system, but also in extrahypothalamic perikarya and fibers. Np-positive perikarya are found in the triangular nucleus of the septum. Np fibers join the stria terminalis (ST) at the level of the anterior hypothalamus, and course medially in the ST to the central nucleus of the amygdala. Np fibers are found in the brain stem and spinal cord. Fine caliber Np fibers from the suprachiasmatic nucleus ascend to the medial dorsal thalamus and lateral septum. The presence of Np within neurones implies the presence of either vasopressin or oxytocin. Np-positive fibers in extrahypothalamic sites may interact with non-neurosecretory neurones involved in neuroendocrine regulation, or may serve as yet unknown functions.

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1984Neuronal Secretory Systems 1983Effects of lesions in the paraventricular nucleus of the hypothalamus on vasopressin and oxytocin contents in brainstem and spinal cord of rat 1980Ontogeny of vasopressin and oxytocin in the fetal rat: Early vasopressinergic innervation of the fetal brain 1981Central Nervous System Distribution of Vasopressin, Oxytocin, and Neurophysin 1986Septal release of vasopressin in response to osmotic, hypovolemic and electrical stimulation in rats 1978Behavioral responses to intracerebroventricularly administered neurohypophyseal peptides in mice 1980Additional forebrain regions projecting to the posterior pituitary: Preoptic region, bed nucleus of the stria terminalis, and zona incerta 1983The effects of vasopressin on electrical activity in the guinea‐pig supraoptic nucleus in vitro.

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