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[Cause of crossed cerebellar diaschisis in cerebrovascular disease]
Insights
Crossed cerebellar diaschisis, a neurological condition, was observed in 45% of stroke patients with hemiplegia. This finding suggests a link between reduced limb movement and cerebellar dysfunction following brain injury.
Area of Science:
- Neurology
- Neuroimaging
- Neuroscience
Background:
- Stroke is a leading cause of long-term disability, often resulting in hemiplegia.
- Cerebellar diaschisis refers to functional depression of the cerebellum due to a remote cortical lesion.
- Crossed cerebellar diaschisis specifically involves the contralateral cerebellar hemisphere.
Purpose of the Study:
- To investigate the prevalence of crossed cerebellar diaschisis in patients with completed stroke or prolonged reversible ischemic neurological deficit (PRIND).
- To explore the relationship between crossed cerebellar diaschisis and the presence and duration of hemiplegia.
- To understand the potential mechanisms underlying crossed cerebellar diaschisis.
Main Methods:
- Brain single-photon emission computed tomography (SPECT) imaging was performed.
- 123I-labeled amphetamines were used as the radiotracer.
- 31 patients with completed stroke (n=30) or PRIND (n=1) were included.
Main Results:
- Crossed cerebellar diaschisis was identified in 14 out of 31 patients (45%).
- All patients with crossed cerebellar diaschisis had long-lasting hemiplegia.
- Patients without crossed cerebellar diaschisis generally did not exhibit hemiplegia.
Conclusions:
- Crossed cerebellar diaschisis is a common finding in stroke patients with hemiplegia.
- The phenomenon is likely caused by reduced spinocerebellar input due to limb paresis.
- This study highlights the interconnectedness of brain regions and the impact of motor deficits on cerebellar function.
Abstract:
In 31 patients with completed stroke (n = 30) or PRIND (n = 1) a brain SPECT with 123I-labeled amphetamines was performed. In 14 (= 45%) of the respective patients--suffering from long-lasting hemiplegia--crossed cerebellar diaschisis was present. The interval between onset of the disease and time of examination varied between 1 week and 7 years. On the other hand, patients without crossed cerebellar diaschisis did not, with one exception, suffer from hemiplegia. It is likely that this phenomenon is caused by the reduction of spino-cerebellar stimuli due to the paresis of the respective extremities.