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Association between perceived neighborhood environment, sedentary behavior, walking, and moderate-to-vigorous physical activity and frailty: an isotemporal substitution model

4 months 3 weeks ago
CONCLUSIONS: Replacing SB with walking and improving neighborhood accessibility were significantly associated with reduced risk of being pre-frail or frail. These findings highlight the importance of considering these factors when designing age-friendly environments for older adults.
Hee-Kyoung Nam

Dysregulated calcium signaling in the aged primate association cortices: vulnerability to Alzheimer's disease neuropathology

4 months 3 weeks ago
The common, late onset form of Alzheimer's disease (AD) selectively impacts higher brain circuits, with tau pathology and neurodegeneration preferentially afflicting glutamatergic neurons in the limbic and association cortices. Understanding this selective vulnerability may help reveal the etiology of sporadic AD and therapeutic targets for prevention. The current review describes that these vulnerable circuits express magnified calcium signaling needed for higher cognition and memory, but that...
Amy F T Arnsten