Crossed cerebellar diaschisis accompanied by hemiataxia: a PET study.

The Mechanism of Ipsilateral Ataxia in Lacunar Hemiparesis: SPECT Perfusion Imaging

“…Recently, ataxia associated with capsular infarct has generally been explained by crossed cerebellar diaschisis [10,11,12]. However, in our present study, crossed cerebellar diaschisis was seen not only in the ataxic hemiparesis group but also in the pure motor hemiparesis group.…”

“…Damage to the cortico-ponto-cerebellar pathway causes crossed cerebellar diaschisis, a functional depression in the contralateral cerebellum [8,9]. This crossed cerebellar diaschisis is currently thought to be the most frequent cause of the ataxia that follows capsular infarct; some recent studies have indicated the presence of crossed cerebellar diaschisis in patients with capsular infarct associated with ataxia [10,11,12]. However, these studies were based either on a small number of cases or even a single case.…”

Cavernous Angioma with Olivary Hypertrophy and Contralateral Cerebellar Diaschisis.

“…The lesions of the cerebropontine-cerebellar tract within the pons are thought to produce contralateral cerebellar diaschisis. In addition, lesions in the thalamus also cause crossed cerebellar diaschisis, and this has been attributed to disruption of the dentato-rubro-thalamic pathway (2). In the present patient, MRIdemonstrated that the lesion was located in the left central tegmental tract and invaded the left medial lemniscus.…”

“…Involvement of the cerebropontine-cerebellar tract is thought to result in crossed cerebellar diaschisis; however, infratentorial lesions interrupting the cerebropontine-cerebellar tract mayalso result in contralateral cerebellar diaschisis in some patients (2)(3)(4) [It may be more precise to refer to cerebellar diaschisis with contralateral supratentorial lesion as "crossed cerebellar diaschisis", and cerebellar diaschisis with contralateral infratentorial lesion as "contralateral cerebellar diaschisis"]. Here, we describe a patient with a tegmental lesion whoappears to have developed contralateral cerebellar diaschisis as a result of interruption of the dentato-olivary pathway.…”

Ataxic Hemiparesis From Strategic Frontal White Matter Infarction With Crossed Cerebellar Diaschisis

“…However, in some cases with milder hemispheric strokes, ipsilateral ataxia has been reported. 8 The 3 cases of AH presented here show that a small stroke in the right subcortical white matter can be sufficient to cause CCD. It is likely that the infarcts in these patients involved the corticopontocerebellar projections but had only a minimal effect on the descending corticospinal tract, thus producing hemiataxia out of proportion to hemiparesis.…”