Cognition at Menopause

Menopause marks the end of a woman’s reproductive years and significantly impacts various physiological systems, particularly the brain. In India, where the life expectancy of women has risen to 70 years, it is crucial to ensure quality of life post-menopause. Neurological symptoms during perimenopause, including cognitive decline, are linked to estrogen deficiency, which disrupts estrogen-regulated brain functions such as thermoregulation, sleep, and memory. Estrogen plays a critical role in brain health by protecting neurons, reducing amyloid levels, and enhancing synaptic growth. However, during the perimenopausal transition, the estrogen receptor network weakens, leading to a hypometabolic state that may increase the risk of neurodegenerative diseases. Clinical studies have shown mixed results regarding the effects of hormone replacement therapy (HRT) on cognition. While some studies suggest that HRT may reduce dementia risk, others, including the Women’s Health Initiative Memory Study (WHIMS), indicate that estrogen-progestin therapy may increase the risk of dementia in older postmenopausal women. Recent trials, such as the KEEPS-Cog, have found no significant cognitive benefits from hormone therapy, though small mood improvements were noted in some groups. The timing of HRT initiation appears to influence its effects on cognition, with some evidence supporting early initiation for potential cardiovascular and cognitive benefits. Furthermore, factors such as comorbidities, vasomotor symptoms, and psychological health also contribute to cognitive decline post-menopause. A multidomain approach to prevention, including lifestyle interventions, may offer a promising strategy to mitigate cognitive decline in postmenopausal women. Further large-scale studies are needed to clarify the long-term effects of HRT on brain health and cognition.