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Writer's cramp is frequently associated with hand tremor and with other focal dystonias. Sometimes brain infarction, haemorrhage, arterio-venous malformations or tumors are found to cause symptomatic focal dystonias. A 44-year-old man came to our attention due to writer's cramp of his right hand and postural 6-8 Hz tremor. About three months after the onset(More)
The previously reported prevalence of multiple sclerosis in Bulgaria is considerably lower than that reported for neighbouring countries. The aim of this study was to perform a detailed epidemiological investigation in well-defined populations in this country to obtain an accurate estimate of the frequency of multiple sclerosis. An epidemiological study was(More)
The article reflects the fact, that concepts like decision making and free will have entered the field of cognitive neuroscience towards the end of 20 th century. It gives an overview of brain structures involved in decision making and the concept of free will; and presenting the results of clinical observations and new methods (functional neuroimaging,(More)
Parkinson's disease (PD) patients show signs of cognitive impairment, such as executive dysfunction, working memory problems and attentional disturbances, even in the early stages of the disease. Though motor symptoms of the disease are often successfully addressed by dopaminergic medication, it still remains unclear, how dopaminergic therapy affects(More)
BACKGROUND The central nervous system is often involved in Behcet's disease. Most common are meningoencephalitic and brain stem syndromes. Although basal ganglia involvement is not an uncommon finding on necropsy, there are only single reports on extrapyramidal syndromes-dyskinesia, chorea and Parkinsonism in patients with Behcet's disease. CASE STUDY We(More)
This investigation estimated the mechanisms of tizanidine action on spasticity using a battery of neurophysiological methods. Thirty patients with old post-stroke spastic hemiparesis took part in the investigation. They were treated with tizanidine-mean daily dose 15.8 +/- 5.6 mg for a mean of 23.3 +/- 4.8 days. A questionnaire for assessment of subjective(More)
When choosing between two options, sufficient accumulation of information is required to favor one of the options over the other, before a decision is finally reached. To establish the effect of dopaminergic medication on the rate of accumulation of information, decision thresholds and speed-accuracy trade-offs, we tested 14 patients with Parkinson's(More)
BACKGROUND Othello syndrome (OS) is an organic delusional disorder with prevailing jealousy symptoms presumably appearing as side effect of antiparkinsonian therapy. The clinical spectrum of psychiatric symptoms in Parkinson's disease (PD) is very wide, including symptoms of depression and anxiety, hallucinations, delusions, with prevalent paranoid(More)
It is well known that during the withdrawal period after chronic alcohol intake, tremor is one of the symptoms that disturb patients. Alcohol withdrawal tremor might be a variant of enhanced physiological tremor, most often caused by anxiety or emotional stress. The aim of this investigation was to establish the EMG pattern of alcoholic tremor and to(More)