M Sommer

Summary

Country: Germany

Publications

  1. ncbi request reprint Paired-pulse repetitive transcranial magnetic stimulation of the human motor cortex
    M Sommer
    Department of Clinical Neurophysiology, University of Gottingen, Germany
    Exp Brain Res 139:465-72. 2001
  2. ncbi request reprint Orientation-specific fast rTMS maximizes corticospinal inhibition and facilitation
    Tobias Tings
    Department of Clinical Neurophysiology, University of Gottingen, Robert Koch Str 40, 37075, Gottingen, Germany
    Exp Brain Res 164:323-33. 2005
  3. doi request reprint Impact of pulse duration in single pulse TMS
    H Rothkegel
    Department of Clinical Neurophysiology, University of Gottingen, Germany
    Clin Neurophysiol 121:1915-21. 2010
  4. doi request reprint When battery exhaustion lets the lame walk: a case report on the importance of long-term stimulator monitoring in deep brain stimulation
    Martin Sommer
    Department of Clinical Neurophysiology, University Medical Centre, Gottingen, Robert Koch Str 40, D 37075, Gottingen, Germany
    BMC Neurol 15:113. 2015
  5. doi request reprint Mechanisms of human motor cortex facilitation induced by subthreshold 5-Hz repetitive transcranial magnetic stimulation
    Martin Sommer
    Dept of Clinical Neurophysiology, Univ of Goettingen, Goettingen, Germany
    J Neurophysiol 109:3060-6. 2013
  6. doi request reprint Opposite optimal current flow directions for induction of neuroplasticity and excitation threshold in the human motor cortex
    Martin Sommer
    Department of Clinical Neurophysiology, University Medical Center Gottingen, Robert Koch Str 40, 37075 Gottingen, Germany
    Brain Stimul 6:363-70. 2013
  7. ncbi request reprint Inverse correlation of intracortical inhibition and brain-stem inhibition in humans
    Martin Sommer
    Department of Clinical Neurology, University of Gottingen, Robert Koch Strasse 40, D 37075 Gottingen, Germany
    Clin Neurophysiol 113:120-3. 2002
  8. ncbi request reprint Pulse configuration and rTMS efficacy: a review of clinical studies
    Martin Sommer
    Department of Clinical Neurophysiology, Center for Neurological Medicine, University of Gottingen, Robert Koch Str 40, D 37075 Gottingen, Germany
    Suppl Clin Neurophysiol 56:33-41. 2003
  9. ncbi request reprint Increased transcranial magnetic motor threshold after ECT. A case report
    Martin Sommer
    Department Psychiatry, University of Gottingen, Gottingen, Germany
    Eur Arch Psychiatry Clin Neurosci 252:250-2. 2002
  10. ncbi request reprint Normal intracortical excitability in developmental stuttering
    Martin Sommer
    Department of Clinical Neurophysiology, University of Gottingen, Gottingen, Germany
    Mov Disord 18:826-30. 2003

Detail Information

Publications32

  1. ncbi request reprint Paired-pulse repetitive transcranial magnetic stimulation of the human motor cortex
    M Sommer
    Department of Clinical Neurophysiology, University of Gottingen, Germany
    Exp Brain Res 139:465-72. 2001
    ..In addition, our data suggest that short trains of paired-pulse rTMS are not superior to single-pulse rTMS in inducing lasting inhibition or facilitation...
  2. ncbi request reprint Orientation-specific fast rTMS maximizes corticospinal inhibition and facilitation
    Tobias Tings
    Department of Clinical Neurophysiology, University of Gottingen, Robert Koch Str 40, 37075, Gottingen, Germany
    Exp Brain Res 164:323-33. 2005
    ..In any case biphasic rTMS results can be explained by a mixture of monophasic opposite stimulations. We propose the use of monophasic pulses for maximizing effects during rTMS...
  3. doi request reprint Impact of pulse duration in single pulse TMS
    H Rothkegel
    Department of Clinical Neurophysiology, University of Gottingen, Germany
    Clin Neurophysiol 121:1915-21. 2010
    ..Here we examined the influence of two different pulse durations on several physiological parameters of primary motor cortex excitability obtained using single pulse TMS...
  4. doi request reprint When battery exhaustion lets the lame walk: a case report on the importance of long-term stimulator monitoring in deep brain stimulation
    Martin Sommer
    Department of Clinical Neurophysiology, University Medical Centre, Gottingen, Robert Koch Str 40, D 37075, Gottingen, Germany
    BMC Neurol 15:113. 2015
    ..While its short-term effectiveness is well documented, there are only few reports on long-term outcomes, and the need to repeatedly reprogram the stimulator is seldom reported...
  5. doi request reprint Mechanisms of human motor cortex facilitation induced by subthreshold 5-Hz repetitive transcranial magnetic stimulation
    Martin Sommer
    Dept of Clinical Neurophysiology, Univ of Goettingen, Goettingen, Germany
    J Neurophysiol 109:3060-6. 2013
    ....
  6. doi request reprint Opposite optimal current flow directions for induction of neuroplasticity and excitation threshold in the human motor cortex
    Martin Sommer
    Department of Clinical Neurophysiology, University Medical Center Gottingen, Robert Koch Str 40, 37075 Gottingen, Germany
    Brain Stimul 6:363-70. 2013
    ..Directional sensitivity is relevant for the excitability threshold of the human primary motor cortex, but its importance for externally induced plasticity is unknown...
  7. ncbi request reprint Inverse correlation of intracortical inhibition and brain-stem inhibition in humans
    Martin Sommer
    Department of Clinical Neurology, University of Gottingen, Robert Koch Strasse 40, D 37075 Gottingen, Germany
    Clin Neurophysiol 113:120-3. 2002
    ..To determine whether intracortical inhibition and the conditioned blink reflex R2 inhibition correlate in healthy subjects...
  8. ncbi request reprint Pulse configuration and rTMS efficacy: a review of clinical studies
    Martin Sommer
    Department of Clinical Neurophysiology, Center for Neurological Medicine, University of Gottingen, Robert Koch Str 40, D 37075 Gottingen, Germany
    Suppl Clin Neurophysiol 56:33-41. 2003
  9. ncbi request reprint Increased transcranial magnetic motor threshold after ECT. A case report
    Martin Sommer
    Department Psychiatry, University of Gottingen, Gottingen, Germany
    Eur Arch Psychiatry Clin Neurosci 252:250-2. 2002
    ..Resting motor thresholds were increased bilaterally after treatment, and the input/output curve less steep. These results point to a decreased excitability of the corticospinal motor tract after successful ECT...
  10. ncbi request reprint Normal intracortical excitability in developmental stuttering
    Martin Sommer
    Department of Clinical Neurophysiology, University of Gottingen, Gottingen, Germany
    Mov Disord 18:826-30. 2003
    ..Normal intracortical excitability makes a pathophysiological analogy between focal dystonia and PDS less likely. The enhanced motor threshold suggests reduced motor cortical neuronal membrane excitability in PDS...
  11. doi request reprint Breaks during 5Hz rTMS are essential for facilitatory after effects
    H Rothkegel
    Department of Clinical Neurophysiology, University of Gottingen, Gottingen, Germany
    Clin Neurophysiol 121:426-30. 2010
    ..Here, we examined the functional relevance of breaks during high-frequency subthreshold rTMS for the induction of facilitatory after effects...
  12. ncbi request reprint Piracetam affects facilitatory I-wave interaction in the human motor cortex
    S Wischer
    Department of Clinical Neurophysiology, University of Goettingen, Robert-Koch-Strasse 40, D-37075, Goettingen, Germany
    Clin Neurophysiol 112:275-9. 2001
    ..Shortening of the I-wave peak latencies is a new phenomenon. The results are discussed on the basis of the known therapeutic effects of piracetam in cortical myoclonus and as nootropic agent...
  13. ncbi request reprint Half sine, monophasic and biphasic transcranial magnetic stimulation of the human motor cortex
    Martin Sommer
    Department of Clinical Neurophysiology, University of Gottingen, Robert Koch Street 40, 37075 Gottingen, Germany
    Clin Neurophysiol 117:838-44. 2006
    ....
  14. ncbi request reprint Intra- and interindividual variability of motor responses to repetitive transcranial magnetic stimulation
    M Sommer
    Department of Clinical Neurophysiology, University of Goettingen, P O Box 3742, D 37070, Goettingen, Germany
    Clin Neurophysiol 113:265-9. 2002
    ..We sought to determine the intra- and interindividual variability of its effects on motor cortex excitability, and whether repeated paired-pulses yield less variability than repeated single-pulses...
  15. ncbi request reprint The stimulus intensity modifies the blink reflex recovery cycle in healthy subjects and in blepharospasm
    M Sommer
    Department of Clinical Neurophysiology, Center for Neurological Medicine, , , Germany
    Clin Neurophysiol 112:2293-9. 2001
    ..CONCLUSIONS: The R2 inhibition and its sensitivity to detect abnormal interneuronal excitability depend on the stimulus intensity, which may act by modifying the excitability of the R2 interneurons...
  16. doi request reprint Reduced intracortical inhibition and facilitation in the primary motor tongue representation of adults who stutter
    N E Neef
    Department of Clinical Neurophysiology, Georg August University, Gottingen, Germany
    Clin Neurophysiol 122:1802-11. 2011
    ..We aimed at detecting neurophysiological changes, in the primary motor tongue representation in adults with persistent stuttering...
  17. doi request reprint Comparative assessment of best conventional with best theta burst repetitive transcranial magnetic stimulation protocols on human motor cortex excitability
    Noman Zafar
    Department of Clinical Neurophysiology, University of Gottingen, Robert Koch Street 40, 37075 Gottingen, Germany
    Clin Neurophysiol 119:1393-9. 2008
    ..Comparative assessment of best conventional with best theta burst repetitive transcranial magnetic stimulation (rTMS) protocols on human motor cortex excitability...
  18. ncbi request reprint Neuronal tissue polarization induced by repetitive transcranial magnetic stimulation?
    Martin Sommer
    Department of Clinical Neurophysiology, University of Gottingen, Robert Koch Str 40, 37075 Gottingen, Germany
    Neuroreport 13:809-11. 2002
    ..d.). We propose that the current flow in the coil plays a significant role in optimising after effects, and asymmetric current flow may be particularly efficient in building up tissue polarization...
  19. doi request reprint Thermal hypoaesthesia differentiates secondary restless legs syndrome associated with small fibre neuropathy from primary restless legs syndrome
    Cornelius G Bachmann
    Department of Clinical Neurophysiology, Georg August University, Robert Koch Strasse 40, D 37075 Goettingen, Germany
    Brain 133:762-70. 2010
    ....
  20. doi request reprint Training effects outweigh effects of single-session conventional rTMS and theta burst stimulation in PD patients
    Holger Rothkegel
    Department of Clinical Neurophysiology, University of Gottingen, Gottingen, Germany
    Neurorehabil Neural Repair 23:373-81. 2009
    ..Focal single-session repetitive transcranial magnetic stimulation (rTMS) of the primary motor cortex has been claimed to be capable of improving motor function in Parkinson's disease...
  21. ncbi request reprint Dopaminergic potentiation of rTMS-induced motor cortex inhibition
    Nicolas Lang
    Department of Neurology, Christian Albrechts University, Kiel, Germany
    Biol Psychiatry 63:231-3. 2008
    ....
  22. ncbi request reprint Modulation of motor consolidation by external DC stimulation
    Nicolas Lang
    Department of Clinical Neurophysiology, University of Gottingen, Robert Koch Strasse 40, D 37075 Gottingen, Germany
    Suppl Clin Neurophysiol 56:277-81. 2003
  23. ncbi request reprint Dyskinesias due to intravenous apomorphine abuse in a patient without basal ganglia disorder
    Svenja Happe
    Department of Clinical Neurophysiology, University of Gottingen, Germany
    Mov Disord 20:105-8. 2005
    ..We describe a patient with psychogenic parkinsonism and intravenous apomorphine abuse leading to subsequent choreatiform dyskinesias...
  24. ncbi request reprint Pulse configuration-dependent effects of repetitive transcranial magnetic stimulation on visual perception
    Andrea Antal
    Department of Clinical Neurophysiology, Georg August University of Gottingen, Robert Koch Strasse 40, 37070 Gottingen, Germany
    Neuroreport 13:2229-33. 2002
    ..However the effect of modulation significantly depends on the current waveform and direction...
  25. ncbi request reprint Repetitive paired-pulse transcranial magnetic stimulation affects corticospinal excitability and finger tapping in Parkinson's disease
    Martin Sommer
    Department of Clinical Neurophysiology, University of Gottingen, Robert Koch Str 40, Gottingen, Germany
    Clin Neurophysiol 113:944-50. 2002
    ..To study the effect of long trains of a recently established conditioning-test paired-pulse repetitive transcranial magnetic stimulation (rTMS) paradigm on corticospinal excitability and finger tapping speed...
  26. doi request reprint H-coil: Induced electric field properties and input/output curves on healthy volunteers, comparison with a standard figure-of-eight coil
    Tommaso Fadini
    Department of Clinical Neurophysiology, University of Goettingen, Robert Koch Str 40, 37075 Goettingen, Germany
    Clin Neurophysiol 120:1174-82. 2009
    ..To acquire information about the physical properties and physiological effects of the H-coil...
  27. doi request reprint Normal interhemispheric inhibition in persistent developmental stuttering
    Martin Sommer
    Department of Clinical Neurophysiology, University of Gottingen, Gottingen, Germany
    Mov Disord 24:769-73. 2009
    ..The abnormal right motor and premotor activity observed in functional imaging studies on PDS are not likely to reflect altered primary motor cortex excitability, but are likely to have a different origin...
  28. ncbi request reprint Intracortical excitability in the hand motor representation in hand dystonia and blepharospasm
    Martin Sommer
    Department of Clinical Neurophysiology, University of Gottingen, Gottingen, Germany
    Mov Disord 17:1017-25. 2002
    ..In addition, our findings in both patient groups show a trend toward a relatively increased intracortical facilitation in surrounding motor areas...
  29. ncbi request reprint Pregabalin in restless legs syndrome with and without neuropathic pain
    M Sommer
    Department of Clinical Neurophysiology, University of Goettingen, Goettingen, Germany
    Acta Neurol Scand 115:347-50. 2007
    ..Restless legs syndrome (RLS) is a common neurological disorder complicated in many patients by augmentation to dopaminergic therapy or comorbidities such as neuropathic pain...
  30. pmc What causes stuttering?
    Christian Buchel
    Department of Neurology at the University of Hamburg in Hamburg, Germany
    PLoS Biol 2:E46. 2004
  31. ncbi request reprint Disconnection of speech-relevant brain areas in persistent developmental stuttering
    Martin Sommer
    NeuroImage Nord, Department of Neurology, University of Hamburg, Hamburg, Germany
    Lancet 360:380-3. 2002
    ..We aimed to establish whether disconnection between speech-related cortical areas was the structural basis of persistent developmental stuttering...