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Brunnstrom stages and Wallerian degenerations: a study using MRI
1Stroke Center, Nanasawa Rehabilitation Hospital, Kanagawa.
The Tohoku Journal of Experimental Medicine
|April 1, 1992
Summary
Magnetic resonance imaging (MRI) revealed Wallerian degeneration in most hemiplegic patients with lower Brunnstrom stages post-rehabilitation. Higher Brunnstrom stages were associated with significantly less degeneration, indicating better recovery.
Area of Science:
- Neuroscience
- Radiology
- Rehabilitation Medicine
Background:
- Brunnstrom stages assess motor recovery after stroke.
- Wallerian degeneration is axonal degeneration distal to an injury.
- Magnetic resonance imaging (MRI) can detect structural changes in the brain.
Purpose of the Study:
- To investigate the correlation between Brunnstrom stages of motor recovery and the presence of Wallerian degeneration in hemiplegic patients.
- To determine if MRI-detected Wallerian degeneration differs between patients with low and high Brunnstrom stages.
Main Methods:
- Retrospective study of 49 hemiplegic patients.
- Patients categorized into low (Brunnstrom stages I-IV) and high (stages V-VI) stage groups.
- T2-weighted MRI scans analyzed for signal intensity changes in corticospinal tracts, indicative of Wallerian degeneration.
Main Results:
- Wallerian degeneration was detected in 27 of 30 patients (90%) in the low stage group.
- Only 5 of 19 patients (26%) in the high stage group showed signs of Wallerian degeneration.
- A significant difference (p < 0.005) in Wallerian degeneration was observed between the low and high stage groups.
Conclusions:
- Lower Brunnstrom stages post-rehabilitation are strongly associated with the presence of Wallerian degeneration.
- Higher Brunnstrom stages correlate with a reduced incidence of detectable Wallerian degeneration.
- MRI findings of Wallerian degeneration may serve as an indicator of motor recovery outcomes in hemiplegic patients.