Early Alzheimer's Indicator May Appear Before Memory Loss
New research suggests that problems with cognitive flexibility could precede memory-related decline in Alzheimer's disease. This finding may offer new diagnostic avenues.
A new study from Texas A&M University indicates that a decline in cognitive flexibility may manifest months before memory-related issues become apparent in Alzheimer's disease. The research was published in the journal Nature Communications.
The study, conducted on animal models exhibiting Alzheimer's-like brain changes, found that the ability to adapt to changing circumstances and switch tasks deteriorated early in the disease process. This occurred prior to any noticeable signs of memory impairment.
"In everyday life, this could present as someone handling a familiar routine well but struggling when priorities change," said Jun Wang, a professor at Texas A&M Health Science Center. "They might continue using a strategy that has stopped working or have difficulty rearranging a multi-step task after an unexpected problem."
Researchers observed that an overactivity in brain circuits related to planning and decision-making occurred early on, alongside reduced signaling of acetylcholine, a neurotransmitter crucial for flexible behavior.
These findings suggest that assessing cognitive flexibility could provide novel methods for the early detection of Alzheimer's, potentially before significant brain damage has taken hold.