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release of milk from the breast following tactile stimulation of the nipple; the afferent path is postulated to exist from the nipple to the hypothalamus; the efferent limb is represented by the neurohypophysial release of oxytocin into the systemic circulation; contraction of myoepithelial elements within the breast, caused by oxytocin, moves milk into the collecting ducts and toward the nipple.
Farlex Partner Medical Dictionary © Farlex 2012
let-down reflexObstetrics A physiologic postpartum response evoked by sucking–or negative mechanical pressure on the ♀ nipple or by psychologic stimuli, causing the release–'let-down' of breast milk in a nursing mother. See Breast milk.
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.