Clinical Neuroscience

[Electrophysiological investigations in Parkinson’s diseae]


JUNE 20, 2002

Clinical Neuroscience - 2002;55(05-06)

[Objective - Post-movement beta synchronization is an increase in EEG beta power after movement termination. Its characteristics in movement disorders are not well described. Tremor dominant Parkinson’s disease shows unique clinical, anatomical and biochemical features. In our study we examined the relation between the laterality of tremor and size of post-movement beta synchronisation in tremor dominant Parkinson’s disease. Methods - In a self-paced movement paradigm we measured movement duration and analyzed EEG power changes at movement-reactive beta frequencies. Results - Movement duration was significantly longer in Parkinson-patients than in controls (0.49±0.170 s, 0.35±0.087 s, p=0.013, Mann-Whitney test). There was no difference between the two hands in the control group (0.36±0.078s, 0.34±0.099 s, p=0.207, Wilcoxon-test), while Parkinson patients performed longer movement with their left hand (0.52±0.195 s, 0.46±0.148 s, p=0.049, Wilcoxon), unrelated to the side of tremor. In controls, post-movement beta synchronisation contralateral to the movement was not significantly different after right and left hand movement (108.1±68.21% and 92.1±23.43%, p=0.78 Wilcoxon). In Parkinson patients post-movement beta synchronisation was significantly smaller contralateral to the tremulous hand movement (36.9±47.79%, 104.7±91.42%, p=0.012, Wilcoxon-test). The post-movement beta synchronisation showed anterior shifting in Parkinson-patients. Conclusions - In tremor dominant Parkinson’s disease the asymmetric decrease of post-move beta synchronisation is related to the laterality of tremor rather than bradykinesia. Analysis of this phenomena might provide further insight to the pathophysiology of Parkinson’s disease.]



Further articles in this publication

Clinical Neuroscience

[The 6th National Congress of Hungarian Chapter of International League against Epilepsy]

Clinical Neuroscience

[Identification of gliomas by morphological and immunocytochemical analysis in cell cultures]


[Introduction - The morphology and immunocytochemical properties of 250 different monolayer cultures derived from various human brain tumor specimens were investigated on purpose to support and complement the neuropatholgical diagnosis. In this study analyses of 124 glioma cases are presented. Methods - The tumor samples were mechanically dissociated and seeded on glass coverslips. After the formation of the monolayer cultures were fixed and stained by May-Grünwald- Giemsa method for the morphological examination. Semi-quantitative immunocytochemical labeling included several different types of mono- and polyclonal primary antibodies using avidin-biotin visualization system. In nine cases of the glioblastomas the sufficient proliferation made possible to establish cell lines from the primary cultures. Results - The glial origin of the tumors was identified in 124 cases based upon the presence of glial fibrillary acidic protein. A negative correlation between the intensity of glial fibrillary acidic protein immunostaining and the grade of tumor malignancy was found. During long-term cultivation of the higher grade gliomas the incidence and intensity of glial fibrillary acidic protein labeled cells was decreasing. Both the vimentin and the neuron specific enolase labeling were in general stronger than the glial fibrillary acidic protein and almost all the cells were stained. The incidence of Ki-67 positive cells increased with the grade of malignancy. Concerning the tumor classification our immunocytochemical results correlated with the routine histopathological examination. Conclusions - On the basis of these results we conclude that monolayer cultures obtained from tumor specimens can support and complement the correct diagnosis of the various human brain tumors.]

Clinical Neuroscience

[The Future of Neuro-rehabilitation]

FÁY Veronika, URBÁN Erika, SZÉPNÉ Kontra Andrea

Clinical Neuroscience

[The Congress of the American Neuro-ophthalmological Society (NANOS)]


Clinical Neuroscience

[In remembrance of Kálmán Sántha, on his 45th death anniversary]


All articles in the issue

Related contents

Clinical Neuroscience

[The treatment of advanced Parkinson’s disease]


[The treatment of Parkinson’s disease depends on the symptoms of the patients and obviously the stage of the disease. Several different approaches can be found in the literature. Based on the published data, in this review we try to summarize the different approaches to the disease stages and theirs’ clinical relevance. Actually, one of the most important issue is the recognition of advanced stage and therefore we reviewed the device-aided therapies. ]

Clinical Neuroscience

[Earlier and more efficiently: the role of deep brain stimulation for parkinson’s disease preserving the working capabilities]

DELI Gabriella, BALÁS István, KOMOLY Sámuel, DÓCZI Tamás, JANSZKY József, ASCHERMANN Zsuzsanna, NAGY Ferenc, BOSNYÁK Edit, KOVÁCS Norbert

[Background – The recently published “EarlyStim” study demonstrated that deep brain stimulation (DBS) for the treatment of Parkinson’s disease (PD) with early fluctuations is superior to the optimal pharmacological treatment in improving the quality of life and motor symptoms, and preserving sociocultural position. Our retrospective investigation aimed to evaluate if DBS therapy was able to preserve the working capabilities of our patients. Methods – We reviewed the data of 39 young (<60 years-old) PD patients who underwent subthalamic DBS implantation at University of Pécs and had at least two years follow-up. Patients were categorized into two groups based on their working capabilities: Patients with active job (“Job+” group, n=15) and retired patients (without active job, “Job-” group, n=24). Severity of motor symptoms (UPDRS part 3), quality of life (EQ-5D) and presence of active job were evaluated one and two years after the operation. Results – As far as the severity of motor symptoms were concerned, similar (approximately 50%) improvement was achieved in both groups. However, the postoperative quality of life was significantly better in the Job+ group. Majority (12/15, 80%) of Job+ group members were able to preserve their job two years after the operation. However, only a minimal portion (1/24, 4.2%) of the Job- group members was able to return to the world of active employees (p<0.01, McNemar test). Conclusion – Although our retrospective study has several limitations, our results fit well with the conclusions of “EarlyStim” study. Both of them suggest that with optimal timing of DBS implantation we may preserve the working capabilities of our patients.]

Clinical Neuroscience

[Dopamine agonists in Parkinson’s disease therapy - 15 years of experience of the Neurological Clinics from Tîrgu Mureș. A cross-sectional study ]

SZÁSZ József Attila, CONSTANTIN Viorelia, MIHÁLY István, BIRÓ István, PÉTER Csongor, ORBÁN-KIS Károly, SZATMÁRI Szabolcs

[Background and purpose - There is relatively few data regarding the usage of dopaminagonists for the treatment of Parkinson’s disease; furthermore, there are no publications regarding Central- and Eastern-European countries. The aim of the study was to evaluate the use of dopamine agonists as a therapeutic option amongst Parkinson’s disease patients admitted to the Neurological Clinics of Tîrgu Mures during the last 15 years. Methods - In our study we investigated the data of all Parkinson’s patients treated at our clinics between the 1st of January 2003 and the 31st of December 2017. We analyzed the particularities of dopamine agonists’ usage based on the therapeutic recommendations from the final report of these patients. Regarding time since the diagnosis, we divided the patients in two groups: less than or equal to 5 years and more than 5 years. Results - During the studied period a total of 2379 patients with Parkinson’s disease were treated at the Clinics. From the 1237 patients with disease duration under 5 years 665 received dopamine agonists: 120 as monotherapy, 83 together with monoamine oxidase inhibitors and in 234 cases associated with levodopa. The remaining 228 patients were treated with a triple combination of levodopa, dopamine agonists and monoamine oxidase inhibitors. In patients suffering from Parkinson’s disease for more than 5 years, in 364 cases out of 653 a dopamine agonist was part of the therapy. Conclusion - The usage of dopamine agonists was similar to the data presented in other studies. We consider that clinicians treating the disease should, with the necessary prudence, use the available and recommended dopamine agonist with the utmost courage to their maximum therapeutic potential.]

Clinical Neuroscience

Vestibular evoked myogenic potential responses in Parkinson’s disease


Background - Our objectives were to determine the differences in the vestibular evoked myogenic potential (VEMP) responses in patients diagnosed with early staged idiopathic Parkinson’s disease (PD) compared to the normal population and evaluate the vestibular system disorder causing balance-posture disorders. Second aim of this study was to investigate caloric test responses particularly in early staged PD compared to normal popu­lation. Material and methods - Thirty patients (14 females and 16 males; mean age, 60.6 ± 13.1 years) diagnosed with idiopathic PD and 28 healthy subjects (20 males and 8 females; mean age, 59.1 ± 6.4 years) were included. The patient and control groups were subdivided according to their age, gender and the patient group was subdivided according to onset time of the Parkinson symptoms, Hoehn-Yahr staging. The subgroups were compared for VEMP and caloric test responses. Results - There were no significant differences between the study and control groups for right and left VEMP measurements. Patients over 60 years and under 60 years did not show significant differences in terms of right and left mean VEMP measurements. However, P1 amplitude was significantly lower in patients over 60 years old (P = .004). Gender, disease duration, BERG balance scale and Hoehn-Yahr stage had no effect on the VEMP amplitudes. There was no significant correlation with the side of Parkinsonian symptoms to the side of canal paresis (P = .566) and the side on which no VEMP response was obtained in caloric test. Conclusion - VEMP responses were not different between PD and healthy subjects. VEMP P1 amplitude was decreased with age in PD group. Canal paresis and symptoms side were not statistically correlated in caloric test.

Clinical Neuroscience

[Recommendation for treatment options in advanced Parkinson's disease]

ASCHERMANN Zsuzsanna, DIBÓ György, KLIVÉNYI Péter, KOVÁCS Norbert, KOVÁCS Tibor, TAKÁTS Annamária, GERTRÚD Tamás, VARANNAI Lajos

[The treatment of advanced Parkinson’s disease is challenging for both physicians and caregivers. The device-aided therapies need expertise and dedicated hospital centers. In this summary we have concluded the available data and recommendation for the treatment options in advanced Parkinson’s disease and adopt them to the daily care in Hungary. ]