When a baby breast-feeds, it triggers a flood of the hormone oxytocin that releases milk from the mammary gland, and a feeling of love and trust in the mother.
New research suggests that breast feeding not only taps the normal brain cells involved in secreting oxytocin, but also uses dendrites to secrete the hormone. Dendrites normally create communication channels between brain cells.
This results in bursts of the hormone released at regular intervals.
* Reuters July 17, 2008