Abstract
To the Editor: In their excellent paper, Dr. Gilman et al. [1] suggested that ``a study of patients with OPCA [olivopontocerebellar atrophy] using SPECT [single-photon emission computed tomography] to examine local cerebral blood flow (lCBF), and assessing the ability of SPECT measurements to differentiate between OPCA and normals might be useful.'' Such a study has, however, been done by us. [2] First, we described cerebellar-cerebral diaschisis using SPECT with hexamethylpropyleneamine oxime (HMPAO) uptake in unilateral cerebellar infarcts; reduced unilateral cerebellar HMPAO uptake was invariably accompanied by a diminution of HMPAO in contralateral basal ganglia and the dorsolateral frontal and parietal cortex. At the …
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