A transcranial magnetic stimulation study of the effects of olanzapine and risperidone on motor cortical excitability in patients with schizophrenia

2002 ◽  
Vol 162 (1) ◽  
pp. 74-81 ◽  
Author(s):  
Paul B. Fitzgerald ◽  
Timothy L. Brown ◽  
Jeff Z. Daskalakis ◽  
J. Kulkarni
Keyword(s):  
Transcranial Magnetic Stimulation ◽  
Magnetic Stimulation ◽  
Cortical Excitability ◽  
Motor Cortical Excitability ◽  
Motor Cortical

Modulation of motor cortical excitability following rapid-rate transcranial magnetic stimulation

2007 ◽  
Vol 118 (1) ◽  
pp. 140-145 ◽  
Author(s):  
Eman M. Khedr ◽  
John C. Rothwell ◽  
Mohamed A. Ahmed ◽  
Ola A. Shawky ◽  
Mona Farouk
Keyword(s):  
Transcranial Magnetic Stimulation ◽  
Magnetic Stimulation ◽  
Cortical Excitability ◽  
Rapid Rate ◽  
Motor Cortical Excitability ◽  
Motor Cortical

scholarly journals Differential effects of motor cortical excitability and plasticity in young and old individuals: a Transcranial Magnetic Stimulation (TMS) study

2014 ◽  
Vol 6 ◽  
Author(s):  
Shahid Bashir ◽  
Jennifer M. Perez ◽  
Jared C. Horvath ◽  
Cleofe Pena-Gomez ◽  
Marine Vernet ◽  
...  
Keyword(s):  
Transcranial Magnetic Stimulation ◽  
Magnetic Stimulation ◽  
Cortical Excitability ◽  
Differential Effects ◽  
Motor Cortical Excitability ◽  
Motor Cortical

Motor Cortical Excitability Assessed by Transcranial Magnetic Stimulation in Psychiatric Disorders: A Systematic Review

2014 ◽  
Vol 7 (2) ◽  
pp. 158-169 ◽  
Author(s):  
Tilmann Bunse ◽  
Thomas Wobrock ◽  
Wolfgang Strube ◽  
Frank Padberg ◽  
Ullrich Palm ◽  
...  
Keyword(s):  
Systematic Review ◽  
Transcranial Magnetic Stimulation ◽  
Psychiatric Disorders ◽  
Magnetic Stimulation ◽  
Cortical Excitability ◽  
Motor Cortical Excitability ◽  
Motor Cortical

Low-intensity repetitive transcranial magnetic stimulation decreases motor cortical excitability in humans

2006 ◽  
Vol 101 (2) ◽  
pp. 500-505 ◽  
Author(s):  
Gabrielle Todd ◽  
Stanley C. Flavel ◽  
Michael C. Ridding
Keyword(s):  
Transcranial Magnetic Stimulation ◽  
Magnetic Stimulation ◽  
Cortical Excitability ◽  
Repetitive Transcranial Magnetic Stimulation ◽  
Motor Threshold ◽  
Sham Stimulation ◽  
Motor Cortical Excitability ◽  
Resting Motor Threshold ◽  
Active Motor ◽  
Motor Cortical

Repetitive transcranial magnetic stimulation of the motor cortex (rTMS) can be used to modify motor cortical excitability in human subjects. At stimulus intensities near to or above resting motor threshold, low-frequency rTMS (∼1 Hz) decreases motor cortical excitability, whereas high-frequency rTMS (5–20 Hz) can increase excitability. We investigated the effect of 10 min of intermittent rTMS on motor cortical excitability in normal subjects at two frequencies (2 or 6 Hz). Three low intensities of stimulation (70, 80, and 90% of active motor threshold) and sham stimulation were used. The number of stimuli were matched between conditions. Motor cortical excitability was investigated by measurement of the motor-evoked potential (MEP) evoked by single magnetic stimuli in the relaxed first dorsal interosseus muscle. The intensity of the single stimuli was set to evoke baseline MEPs of ∼1 mV in amplitude. Both 2- and 6-Hz stimulation, at 80% of active motor threshold, reduced the magnitude of MEPs for ∼30 min ( P < 0.05). MEPs returned to baseline values after a weak voluntary contraction. Stimulation at 70 and 90% of active motor threshold and sham stimulation did not induce a significant group effect on MEP magnitude. However, the intersubject response to rTMS at 90% of active motor threshold was highly variable, with some subjects showing significant MEP facilitation and others inhibition. These results suggest that, at low stimulus intensities, the intensity of stimulation may be as important as frequency in determining the effect of rTMS on motor cortical excitability.

Motor cortical excitability in obsessive-compulsive disorder: Transcranial magnetic stimulation study

2016 ◽  
Vol 46 (2) ◽  
pp. 135-143 ◽  
Author(s):  
Eman M. Khedr ◽  
Khaled A.M. Elbeh ◽  
Yasser Elserogy ◽  
Hossam E. Khalifa ◽  
Mohamed A. Ahmed ◽  
...  
Keyword(s):  
Transcranial Magnetic Stimulation ◽  
Obsessive Compulsive Disorder ◽  
Magnetic Stimulation ◽  
Cortical Excitability ◽  
Obsessive Compulsive ◽  
Compulsive Disorder ◽  
Motor Cortical Excitability ◽  
Motor Cortical

P 5. Motor cortical excitability in psychiatric disorders probed by transcranial magnetic stimulation: A systematic review

2013 ◽  
Vol 124 (10) ◽  
pp. e65-e66
Author(s):  
T. Bunse ◽  
W. Strube ◽  
T. Wobrock ◽  
F. Padberg ◽  
P. Falkai ◽  
...  
Keyword(s):  
Systematic Review ◽  
Transcranial Magnetic Stimulation ◽  
Psychiatric Disorders ◽  
Magnetic Stimulation ◽  
Cortical Excitability ◽  
Motor Cortical Excitability ◽  
Motor Cortical

scholarly journals Effects of Slow Oscillatory Transcranial Alternating Current Stimulation on Motor Cortical Excitability Assessed by Transcranial Magnetic Stimulation

2021 ◽  
Vol 15 ◽  
Author(s):  
Asher Geffen ◽  
Nicholas Bland ◽  
Martin V. Sale
Keyword(s):  
Transcranial Magnetic Stimulation ◽  
Magnetic Stimulation ◽  
Cortical Excitability ◽  
Alternating Current ◽  
Motor Cortical Excitability ◽  
Transcranial Alternating Current Stimulation ◽  
Motor Cortical ◽  
Healthy Participants

Graphical AbstractThirty healthy participants received 60 trials of intermittent SO (0.75 Hz) tACS (1 trial = 16 s on + 16 s off) at an intensity of 2 mA. Motor cortical excitability was assessed using TMS-induced MEPs (blue waveforms) acquired across different oscillatory phases during (i.e., online; red arrows) and outlasting (i.e., offline; green arrows) tACS, as well as at the start and end of the stimulation session (blue arrows). Mean MEP amplitude increased by ∼41% from pre- to post-tACS (P = 0.013); however, MEP amplitudes were not modulated with respect to the tACS phase.

scholarly journals Using Cutaneous Receptor Vibration to Uncover the Effect of Transcranial Magnetic Stimulation (TMS) on Motor Cortical Excitability

2020 ◽  
Vol 26 ◽  
Author(s):  
Maja Rogić Vidaković ◽  
Ana Kostović ◽  
Ana Jerković ◽  
Joško Šoda ◽  
Mladen Russo ◽  
...  
Keyword(s):  
Transcranial Magnetic Stimulation ◽  
Magnetic Stimulation ◽  
Cortical Excitability ◽  
Motor Cortical Excitability ◽  
Motor Cortical

Interhemispheric asymmetry of motor cortical excitability in major depression as measured by transcranial magnetic stimulation

2000 ◽  
Vol 177 (2) ◽  
pp. 169-173 ◽  
Author(s):  
Fumiko Maeda ◽  
Julian P. Keenan ◽  
Alvaro Pascual-Leone
Keyword(s):  
Transcranial Magnetic Stimulation ◽  
Magnetic Stimulation ◽  
Cortical Excitability ◽  
Motor Threshold ◽  
Major Depressive ◽  
Paired Pulse ◽  
Prefrontal Cortical ◽  
Motor Cortical Excitability ◽  
Motor Cortical ◽  
Normal Controls

BackgroundNeuroimaging studies of major depressive disorder (MDD) indicate interhemispheric differences in prefrontal cortical activity (right greater than left).AimsTo investigate whether there are any interhemispheric differences of motor cortical excitability in MDD.MethodEight patients with treatment-refractory MDD off medication were assessed for the severity of their depression, and transcranial magnetic stimulation studies (bilateral motor threshold and paired-pulse studies) were conducted. Eight normal controls were also studied.ResultsMDD patients showed significant interhemispheric differences in motor threshold and paired-pulse curves, both of which showed lower excitability on the left hemisphere. Such differences were absent in controls.ConclusionsOur findings may aid the further understanding of the neurophysiology underlying MDD.

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