Several cases of parkinsonism were found in a ferromanganese smelter after the ventilation system had broken down and had not been repaired for eight months in 1985. To determine the aetiology and prevalence of parkinsonism, 132 workers were submitted to thorough medical examination and estimated air concentrations of carbon monoxide and manganese at different worksites. Only six of eight worke...

OBJECTIVE To evaluate whether visual assessment of [123I]-FP-CIT (DaTSCAN, Nycomed Amersham, plc) single photon emission computerized tomography (SPECT) images can differentiate between parkinsonism and essential tremor (ET). METHODS [123I]-FP-CIT SPECT imaging was conducted in a six-center study of 158 patients with a clinical diagnosis of parkinsonism compared with 27 ET cases and 35 health...

BACKGROUND Individuals with fragile X-associated tremor/ataxia syndrome frequently have associated features of parkinsonism, often leading to an initial diagnosis of Parkinson disease or other parkinsonism spectrum disorders. Parkinson disease populations may thus include individuals who harbor premutation expansions (55-200 CGG repeats) of the fragile X mental retardation 1 (FMR1) gene. OBJE...

BACKGROUND Many individuals with Parkinson's disease are not diagnosed and treated. Attitudes about aging and related help-seeking may affect the timely diagnosis of Parkinson's disease. Our objectives were to develop measures of older adults' expectations regarding movement with aging, specifically related to parkinsonism, and their beliefs about seeking healthcare for the diagnosis and treatm...

Parkinsonism due to cerebrovascular disease (vascular parkinsonism, VP) is a distinct clinicopathological entity. It accounts for 4.4-12% of all cases of parkinsonism. Since there are no specific diagnostic criteria, true incidence and prevalence rates of VP are not known. Typically, parkinsonism in slow-onset VP tends to be bilaterally symmetrical, affecting the lower limbs more than the upper...

Parkinson’s disease (PD) is defined clinically as a disorder characterized by the presence of at least two of four cardinal signs, i.e., resting tremor, bradykinesia, rigidity, and postural instability, along with a good response to levodopa (1). Patients with typical PD do not manifest ataxia, chorea, orthostatic hypotension unrelated to medications, vertical downward-gaze deficits, amyotrophy...

The effects of levodopa on tests measuring auditory and visual perception, auditory, and visual short-term memory, verbal learning, and on attention and concentration were studied in 29 patients with Parkinsonism. Thirty-two control subjects matched with the Parkinsonism patients on age, educational level, and verbal IQ were administered the same tests to control for practice effects. Significa...

OBJECTIVE The goal of this study was to characterize the parkinsonian phenotype in patients with Gaucher disease (GD) who developed parkinsonism in order to evaluate clinical course and prognosis. METHODS This is a retrospective observational study conducted at the Clinical Center of the NIH, Bethesda, MD, over a period of 10 years. The study included 19 patients with GD and parkinsonism. The...

Objective: To apply deep learning pose estimation algorithms for vision-based assessment of parkinsonism and levodopa-induced dyskinesia (LID). Methods: Nine participants with Parkinson's disease (PD) and LID completed a levodopa infusion protocol, where symptoms were assessed at regular intervals using the Unified Dyskinesia Rating Scale (UDysRS) and Unified Parkinson's Disease Rating Scale (U...

INTRODUCTION Parkinson's disease (PD) occurs in all races and cultures, and population-related differences in frequency may provide etiological clues. The present study was designed to explore the prevalence of PD and Parkinsonism in Pakistan, the world's sixth most populous country, for which no published prevalence data are available. METHODS We conducted a three-phase door-to-door survey i...