Related Experiment Videos
Motor recovery after stroke. Morphological and functional brain alterations
P Pantano1, R Formisano, M Ricci
1Department of Neurological Sciences, University of Rome La Sapienza, Italy.
Brain : a Journal of Neurology
|December 1, 1996
Summary
This study found that in chronic stroke patients, impaired blood flow in specific brain areas of both damaged and undamaged hemispheres impacts motor deficit severity and recovery. Poor blood flow in the undamaged hemisphere
Area of Science:
- Neurology
- Neuroimaging
- Stroke Rehabilitation
Background:
- Stroke significantly impacts motor function, with recovery patterns varying in the chronic phase.
- Understanding the relationship between brain morphology, cerebral blood flow (CBF), and motor deficits is crucial for predicting stroke outcomes.
- Late-phase stroke recovery is complex and influenced by both structural and functional brain changes.
Purpose of the Study:
- To investigate the links between brain imaging findings (morphology, CBF) and motor deficit severity/evolution in chronic stroke.
- To identify specific brain alterations associated with persistent severe motor deficits or delayed motor recovery.
- To correlate neuroimaging data with clinical outcomes in patients during the chronic phase of stroke.
Main Methods:
- Analysis of CT/MRI and single photon emission tomography (SPET) in 37 chronic stroke patients.
- Clinical follow-up for 3 months to assess motor recovery.
- Correlation of infarct characteristics (volume, location) and CBF patterns with motor deficit severity and improvement.
Main Results:
- Infarct volume, side, and location did not correlate with motor deficit severity or evolution.
- Parietal lobe lesions were associated with more severe motor deficits.
- Motor deficit severity correlated negatively with CBF in the supplementary motor area (SMA), parietal areas (damaged hemisphere), and contralateral primary motor cortex.
- Motor improvement correlated positively with CBF in the contralateral undamaged thalamus, basal ganglia, and premotor cortex.
- Functional impairment in associative parietal/frontal areas (damaged hemisphere) linked to motor deficit severity.
- Impaired basal ganglia-frontal network (undamaged hemisphere) linked to poor, delayed motor recovery.
Conclusions:
- In chronic stroke, motor deficit severity is associated with functional impairment in associative parietal and frontal areas of the damaged hemisphere.
- Poor or delayed motor recovery in the late phase of stroke is linked to functional impairment within the basal ganglia-frontal network of the undamaged hemisphere.
- CBF patterns in both hemispheres are critical indicators of motor deficit severity and recovery potential post-stroke.