• Publications
  • Influence
Cognitive impairment in early, untreated Parkinson's disease and its relationship to motor disability.
Current knowledge of cognitive dysfunction in Parkinson's disease (PD) has largely been obtained from studies of chronically treated patients in whom effects of disease chronicity, treatment,Expand
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Different effects of dopaminergic and anticholinergic therapies on cognitive and motor function in Parkinson's disease. A follow-up study of untreated patients.
The cognitive performance of a group of 82 newly diagnosed patients with Parkinson's disease who had never been treated was reassessed approximately 4 mths after randomization to one of threeExpand
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Hallucinosis in idiopathic Parkinson’s disease
BACKGROUND Hallucinosis is a complication of the treatment of idiopathic Parkinson’s disease commonly thought to afflict older, chronically medicated, cognitively impaired patients. However, patientsExpand
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Slowed central processing in simple and go/no-go reaction time tasks in Parkinson's disease.
Studies of cognition and motor control have independently suggested that patients with Parkinson's disease show deficits in both attentional control and the preprogramming of movement. However, fewExpand
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A data‐driven approach to the study of heterogeneity in idiopathic Parkinson's disease: identification of three distinct subtypes
  • J. M. Graham, H. Sagar
  • Medicine, Psychology
  • Movement disorders : official journal of the…
  • 1 January 1999
Idiopathic Parkinson's disease (IPD) has been subclassified on the basis of predominant motor symptomatology, age at disease onset, depressive affect, and cognitive performance. However, subgroupsExpand
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A component analysis of the generation and release of isometric force in Parkinson's disease.
Paradigms of isometric force control allow study of the generation and release of movement in the absence of complications due to disordered visuomotor coordination. The onset and release ofExpand
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Remote memory function in Alzheimer's disease and Parkinson's disease.
Remote memory for public and personal events was evaluated in Alzheimer's disease (AD) and Parkinson's disease (PD), using a series of recall and recognition tests. Information related to content andExpand
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Aneurysmal SAH
Background: Aneurysmal subarachnoid hemorrhage (SAH) and surgical clipping of intracranial aneurysms are associated with substantial morbidity and mortality. Objective: To compare cognitive outcomeExpand
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Idiopathic focal dystonia: a disorder of muscle spindle afferent processing?
As muscle spindles are involved in the sensation of position and movement of the body, we tested their involvement in the pathophysiology of idiopathic focal dystonia. Twenty patients withExpand
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Cognitive outcome after aneurysm rupture
Article abstract—We evaluated cognitive outcome in a group of 37 patients who had undergone surgery for rupture and repair of a single intracranial aneurysm at least 6 months previously. We comparedExpand
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