January 25, 2026

@michaelokun

Exercise may be shaping the Parkinson’s brain. What does it mean when we say structural brain changes? Structural brain changes refer to measurable differences in brain thickness or volume that relate to thinking memory and brain health over time. Diaz-Galvan and colleagues describe in a new paper in Neurology how regular physical exercise is associated w/ brain structure and cognitive decline in folks w/ early Parkinson disease. Key points: - Higher levels of regular physical activity were associated w/ slower thinning of temporoparietal brain regions linked to memory and attention. - Exercise was associated w/ slower volume loss in the hippocampus and amygdala which are both critical for memory and emotional processing. - Slower cognitive decline in memory and attention was partly explained by preservation of these brain structures over time. My take: This study moves exercise beyond lifestyle advice and into the biology of Parkinson's disease. Physical activity was frequently associated w/ measurable brain preservation that mattered for cognition. This does not prove cause and effect, however the signal was consistent, compelling and clinically meaningful. Movement appears tied to brain resilience, not just motor function. Here are 5 points that resonated w/ me: 1- Exercise may help slow brain changes that drive cognitive decline in Parkinson disease. 2- Brain regions affected were those frequently linked to memory and attention problems. 3- Benefits appeared longitudinally, reinforcing that consistency matters more than intensity bursts. 4- Physical activity should be viewed as a core component of Parkinson's care alongside medications delivered by healthcare providers. 5- Starting and sustaining movement early may possibly help folks build cognitive reserve over time. https://www.neurology.org/doi/pdf/10.1212/WNL.0000000000214455 #parkinson #michaelokun #fixelinstitute