abstract: Differences in regional brain metabolism associated with specific formulations of hormone therapy in postmenopausal women at risk for AD (Alzheimer's disease)

"In conclusion, particular areas of relatively preserved metabolism were seen in women with more years of endogenous estrogen exposure, as well as in women taking estradiol-based formulations or estrogen therapies unopposed by progesterone, together suggesting regionally specific neuroprotective estrogenic effects."

abstract: Sympathetic and parasympathetic activity in cancer-related fatigue: More evidence for a physiological substrate in cancer survivors

also media report

"Persistent fatigue that plagues many breast cancer survivors even 10 years after treatment may be caused by the autonomic nervous, U.S. researchers say.'

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