Andrew I. Yang

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Beta frequency (13-30 Hz) oscillatory activity in the subthalamic nucleus (STN) of Parkinson's disease (PD) has been shown to influence the temporal dynamics of high-frequency oscillations (HFOs; 200-500 Hz) and single neurons, potentially compromising the functional flexibility of the motor circuit. We examined these interactions by simultaneously(More)
Intracranial electrode arrays are routinely used in the pre-surgical evaluation of patients with medically refractory epilepsy, and recordings from these electrodes have been increasingly employed in human cognitive neurophysiology due to their high spatial and temporal resolution. For both researchers and clinicians, it is critical to localize electrode(More)
Dysembryoplastic neuroepithelial tumours (DNET) are a common cause of tumour-associated epilepsy, and are usually located in the temporal lobes. We present a case of multifocal DNETs in both infra- and supra-tentorial locations, in a 23-year-old man with a coincident Type I Chiari malformation, presenting with medically refractory focal seizures. The(More)
CONTEXT Carcinoids have rarely been described in von Hippel-Lindau (VHL) disease. OBJECTIVE We describe the first reported case of a patient with VHL who developed a pulmonary carcinoid that subsequently metastasized to a pre-existent cranial hemangioblastoma. RESULTS Histological and immunohistochemical features of the metastatic lesion were similar to(More)
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