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Tuberoinfundibular pathway shown in opaque blue, connecting that hypothalamus with the pituitary gland. The tuberoinfundibular pathway refers to a population of dopamine neurons that project from the arcuate nucleus (a.k.a. the "infundibular nucleus") in the tuberal region of the hypothalamus to the median eminence. [1]
Its main function is the stimulation of the pituitary synthesis of adrenocorticotropic hormone (ACTH), as part of the hypothalamic–pituitary–adrenal axis (HPA axis). Corticotropin-releasing hormone (CRH) is a 41-amino acid peptide derived from a 196-amino acid preprohormone.
Schematic of the HPA axis (CRH, corticotropin-releasing hormone; ACTH, adrenocorticotropic hormone) Hypothalamus, pituitary gland, and adrenal cortex The hypothalamic–pituitary–adrenal axis (HPA axis or HTPA axis) is a complex set of direct influences and feedback interactions among three components: the hypothalamus (a part of the brain located below the thalamus), the pituitary gland (a ...
Synthetic TRH is also used by physicians as a test of TSH reserve in the pituitary gland as it should stimulate the release of TSH and prolactin from this gland. The main releasing hormones are as follows: The hypothalamus uses thyrotropin-releasing hormone (TRH or thyroliberin) to tell the pituitary to release thyrotropin.
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This triggers the release of GnRH into the hypophyseal portal capillary bloodstream, where the GnRH hormone activates the pituitary to release luteinizing hormone and follicle stimulating hormone. In addition to classical neurotransmitters, some guidance molecules can change the wiring of GnRH neurons to the portal capillary system, altering ...
[citation needed] Sympathetic nerve fiber impulses stimulate the release of adrenal medullary hormones. In this way the sympathetic division of the autonomic nervous system and the medullary secretions function together. The major center of neuroendocrine integration in the body is found in the hypothalamus and the pituitary gland. Here ...