- The release of a secretory substance from the axon terminals of certain nerve cells in the brain into the circulating blood. The secretory product may be a true hormone, e.g., the antidiuretic hormone released from the axon terminals of the neurons composing the supraoptic nucleus of the hypothalamus; in the case of the so-called releasing-factor neurons of the hypothalamus the cell product is not a systemic hormone in its own right but elicits the release of trophic hormones by the anterior lobe of the hypophysis, substances that in turn stimulate peripheral endocrine glands to release their systemically active hormones.
* * *neu·ro·se·cre·tion -si-'krē-shən n1) the process of producing a secretion by nerve cells2) a secretion produced by neurosecretionneu·ro·se·cre·to·ry -'sē-krə-.tȯr-ē, esp Brit -si-'krēt-(ə-)rē adj
* * *n.any substance produced within, and secreted by, a nerve cell. Important examples are the hormone-releasing factors produced by the cells of the hypothalamus and released into blood vessels of the pituitary gland, on which they act.
* * *neu·ro·se·cre·tion (noor″o-sə-kreґshən) [neuro- + secretion] 1. the secretory activities of nerve cells, as the secretion of releasing hormones, vasopressin, neurotransmitters, etc. 2. the product of such activities; a neurosecretory substance.
Medical dictionary. 2011.