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Changes in bone mineral content and density after stroke

R C Hamdy1, G Krishnaswamy, V Cancellaro

  • 1Department of Internal Medicine, East Tennessee State University, Johnson City.

American Journal of Physical Medicine & Rehabilitation
|August 1, 1993
PubMed
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Stroke survivors experience significant bone loss, particularly in the upper limbs on the paralyzed side. This bone demineralization risk increases with time since stroke, highlighting the need for targeted interventions.

Area of Science:

  • Orthopedics
  • Neurology
  • Radiology

Background:

  • Stroke-induced unilateral muscle weakness leads to limb disuse.
  • Disuse is a known factor contributing to bone demineralization and osteoporosis.
  • Limited research exists on bone mineral changes in stroke patients.

Purpose of the Study:

  • To compare bone mineral content and density between paralyzed and non-paralyzed limbs post-stroke.
  • To investigate the relationship between stroke duration and bone demineralization.
  • To compare demineralization severity in upper versus lower limbs.

Main Methods:

  • Dual photon absorptiometry used to measure bone mineral content and density.
  • Study included 30 ambulant patients with unilateral weakness post-stroke.

Related Experiment Videos

  • Region of interest analysis applied to assess limb-specific bone changes.

    • Main Results:

    • Significantly lower bone mineral content and density found on the paralyzed side compared to the non-paralyzed side.
    • Demineralization was more pronounced in upper limbs (arms) than lower limbs (legs).
    • Stronger correlation between stroke duration and demineralization observed in upper limbs.

    Conclusions:

    • Patients with stroke-related muscle weakness face an elevated risk of osteoporosis on the paralyzed side.
    • Upper limbs are particularly vulnerable to demineralization after stroke.
    • Findings underscore the importance of monitoring bone health in stroke survivors.