Institute of Clinical Neuroscience and Medical Psychology and Department of Neurology, Heinrich-Heine-University Düsseldorf, D-40225 Düsseldorf, Germany +49/211/81-13014 // +49/211/81-13015
Title of the talk and abstract (max. 300 words, it will not be edited):
Source localization and network analysis in tremor. Alfons Schnitzler1,2
1Institute of Clinical Neuroscience and Medical Psychology, and 2Department of Neurology, Heinrich-Heine-University Düsseldorf, D-40225 Düsseldorf, Germany Tremor represents a frequent clinical symptom in movement disorders. In this presentation recent MEG studies on underlying brain networks of different termor syndromes will be discussed. MEG investigations of Parkinson´s disease (PD) resting tremor have identified an abnormally synchronized oscillatory network comprising subcortical and cortical areas that are driven at tremor frequency or twice the tremor frequency. The same network is also active during voluntary repetitive movements of healthy subjects imitating PD resting tremor. However, increased thalamocortical and decreased premotor-motor-cortical coherence differentiates PD resting tremor from tremor imitation. Administration of levodopa reduces thalamocortical coherence and results in clinical tremor reduction. These findings provide strong evidence for a pathophysiological role of abnormal oscillator y synchronization. MEG investigation of patients with other tremor syndromes, such as essential tremor and hepatic tremor have also revealed abnormal oscillatory patterns which are, however, distinct from PD tremor. In summary, there is accumulating evidence that distinct abnormal oscillatory synchronization in cortico-subcortical loops constitutes an important pathophysiological mechanism underlying different tremor syndromes. Thus, studying pathological oscillatory synchronization as revealed by MEG may offer new perspectives for differential diagnosis and disease monitoring.
Curriculum vitae Personal Data Schnitzler, Alfons, Prof. Dr. med. Affiliation
Universitätklinikum Düsseldorf, Heinrich-Heine-Universität Düsseldorf
Institut für Klinische Neurowissenschaften und Medizinische Psychologie & Neurologische Klinik
Study of Medicine at Aachen, Kiel and Cambridge/UK
Medical State Examination and Full Medical License
Dissertation (Dr. med.) at Christian-Albrechts-University of Kiel
Board certificate in Clinical Neurophysiology
Habilitation in „Neurology and Neurophysiology” at Heinrich-Heine-University, Düsseldorf
Clinical, Research and Academic Positions
Residency and Research Scientist, Dept. of Psychiatry, Heinrich-Heine-
Residency and Research Scientist, Dept. of Neurology, Heinrich-Heine-University, Düsseldorf
Visiting Scientist at MEG lab of Brain Research Centre, Helsinki
Principal investigator of collaborative research center (SFB 194) of German Research Council, Heinrich-Heine-University, Düsseldorf
Leader of MEG Research Group funded by Volkswagen Foundation, Heinrich-Heine-University, Düsseldorf
Consultant neurologist and docent in Neurology at Heinrich-Heine-
Principal investigator of collaborative research center (SFB 575) of German Research Council, Heinrich-Heine-University, Düsseldorf
Associate Professor and Director of Movement Disorders Clinic,
Professor of Neurology at Heinrich-Heine-University, Düsseldorf
Professor and Chair of Neuroscience and Neurology, Wales Institute of Cognitive Neuroscience, Bangor, UK
Professor and Chair of Clinical Neuroscience and Medical Psychology,
Head of Movement Disorders Center at the Department of Neurology, Heinrich-Heine-University Düsseldorf
Hans-Jörg-Weitbrecht Clinical Neuroscience Award
Pollok B, Makhloufi H, Butz M, Gross J, Timmermann L, Wojtecki L, Schnitzler A. (2009) Levodopa affects functional brain networks in parkinsonian resting tremor. Mov Disord, 24, 91-8.
Reck C, Florin E, Wojtecki L, Krause H, Groiss S, Voges J, Maarouf M, Sturm V, Schnitzler A, Timmermann L. (2009) Characterisation of tremor-associated local field potentials in the subthalamic nucleus in Parkinson's disease. Eur J Neurosci., 29, 599-612.
Schnitzler A, Gross J. (2005) Normal and pathological oscillatory communication in the brain. Nat Rev Neurosci, 6, 285-96.
Schnitzler A, Münks C, Butz M, Timmermann L, Gross J. (accepted 2009) Synchronized brain network associated with essential tremor as revealed by magnetoencephalography. Movement Disorders, 24 (11), 1629-1635.
Timmermann L, Gross J, Dirks M, Volkmann J, Freund HJ, Schnitzler A. (2003) The cerebral oscillatory network of parkinsonian resting tremor. Brain, 126, 199-212.
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