Pseudochoreoathetosis in a Patient With Hypesthetic Ataxic Hemiparesis due to Thalamic Infarction

ABSTRACT

Pseudochoreoathetosis can be found in association with lesions in the parietal lobe, thalamus (ventrolateral nucleus), brainstem or spinal cord due to severe proprioceptive deficits. We report right pseudochoreoathetosis in a 72-year-old woman with hypesthetic (>50%) ataxic hemiparesis due to contralateral thalamogeniculate artery territory infarction involving the ventrolateral nucleus lesion. In our patient, proprioceptive deafferentiation may have played a key role in inducing pseudochoreoathetotic movements.