Changes to volumetric bone mineral density and bone strength after stroke: a prospective study

Area of Science:

• Neuroscience
• Orthopedics
• Gerontology

Background:

• Stroke survivors exhibit accelerated bone loss and elevated fracture risk, especially in paretic limbs.
• Understanding these bone changes and their correlation with stroke severity and physical activity is crucial for developing interventions.

Purpose of the Study:

• To investigate the temporal changes and extent of volumetric bone mineral density within one year post-stroke.
• To examine the relationship between these bone density changes, physical activity levels, and motor recovery.

Main Methods:

• Prospective, observational study involving 43 non-diabetic, non-ambulant adults with first-ever hemispheric stroke.
• Primary outcome: 6-month change in volumetric bone mineral density in distal tibiae (paretic vs. non-paretic) via high-resolution peripheral quantitative computed tomography.

Main Results:

• Secondary outcomes included detailed bone structure analysis (cortical/trabecular density, thickness, area) in tibiae and radii.
• Assessed total body and regional bone mineral density (DXA), physical activity (accelerometry), and motor recovery (Chedoke McMaster Stroke Assessment).

Conclusions:

• Quantifying bone density and structural changes post-stroke, alongside their links to physical activity and motor recovery, is essential.
• This data will guide the development of targeted interventions to mitigate fracture risk in stroke survivors.