PARAESTHESIAS ARE ELICITED BY SINGLE PULSE, MAGNETIC COIL STIMULATION OF MOTOR CORTEX IN SUSCEPTIBLE HUMANS

Brain ◽  
1991 ◽  
Vol 114 (6) ◽  
pp. 2505-2520 ◽  
Author(s):  
VAHE E. AMASSIAN ◽  
ROTHWELL JOHN C. ◽  
MAHENDRA SOMASUNDARAM ◽  
THOMAS BRITTON ◽  
JOAN B. CRACCO ◽  
...  
Keyword(s):  
Motor Cortex ◽  
Single Pulse ◽  
Magnetic Coil ◽  
Stimulation Of

Transcranial Magnetic Coil Stimulation of Motor Cortex in Patients with Central Pain

Neurosurgery ◽  
1995 ◽  
Vol 36 (5) ◽  
pp. 1037-1040 ◽  
Author(s):  
Keisuke Migita ◽  
Tohru Uozumi ◽  
Kazunori Arita ◽  
Shuji Monden
Keyword(s):  
Motor Cortex ◽  
Central Pain ◽  
Magnetic Coil ◽  
Stimulation Of

scholarly journals Disrupted Central Inhibition after Transcranial Magnetic Stimulation of Motor Cortex in Schizophrenia with Long-Term Antipsychotic Treatment

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
Aulikki Ahlgrén-Rimpiläinen ◽  
Hannu Lauerma ◽  
Seppo Kähkönen ◽  
Ilpo Rimpiläinen
Keyword(s):  
Transcranial Magnetic Stimulation ◽  
Motor Cortex ◽  
Magnetic Stimulation ◽  
Motor Evoked Potentials ◽  
Silent Period ◽  
Single Pulse ◽  
Contralateral Side ◽  
Antipsychotic Treatment ◽  
Stimulation Of

Aims. Schizophrenia is a neuropsychiatric disorder associated with mental and motor disturbances. We aimed to investigate motor control, especially central silent period (CSP) in subjects with schizophrenia (n=11) on long-term antipsychotic treatment compared to healthy controls (n=9). Methods. Latency and duration of motor evoked potentials (MEPs) and CSPs were measured with the help of single pulse transcranial magnetic stimulation (TMS) and intramuscular electrodes. After stimulation of the dominant and nondominant motor cortex of abductor digiti minimi (ADM) and tibialis anterior (TA) muscle areas, respective responses were measured on the contralateral side. Results. MEPs did not differ significantly between the groups. Multiple CSPs were found predominantly in subjects with schizophrenia, which showed a higher number of CSPs in the dominant ADM and the longest summarized duration of CSPs in the nondominant ADM (P<0.05) compared to controls. Conclusions. There were multiple CSPs predominantly in the upper extremities and in the dominant body side in subjects with schizophrenia. Behind multiple CSPs may lie an impaired regulation of excitatory or inhibitory neurotransmitter systems in central motor pathways. Further research is needed to clarify the role of the intramuscular recording methods and the effect of antipsychotics on the results.

Transcranial Magnetic Coil Stimulation of Motor Cortex in Patients with Central Pain

Neurosurgery ◽  
1995 ◽  
Vol 36 (5) ◽  
pp. 1037???1040 ◽  
Author(s):  
Keisuke Migita ◽  
Tohru Uozumi ◽  
Kazunori Arita ◽  
Shuji Monden
Keyword(s):  
Motor Cortex ◽  
Central Pain ◽  
Magnetic Coil ◽  
Stimulation Of

A sense of movement elicited in paralyzed distal arm by focal magnetic coil stimulation of human motor cortex

1989 ◽  
Vol 479 (2) ◽  
pp. 355-360 ◽  
Author(s):  
Vahe E. Amassian ◽  
Roger Q. Cracco ◽  
Paul J. Maccabee
Keyword(s):  
Motor Cortex ◽  
Human Motor Cortex ◽  
Magnetic Coil ◽  
Human Motor ◽  
Stimulation Of

Effect of Isoflurane on Motor-evoked Potentials Induced by Direct Electrical Stimulation of the Exposed Motor Cortex with Single, Double, and Triple Stimuli in Rats

1996 ◽  
Vol 85 (5) ◽  
pp. 1176-1183 ◽  
Author(s):  
Masahiko Kawaguchi ◽  
Kiyoshi Shimizu ◽  
Hitoshi Furuya ◽  
Takanori Sakamoto ◽  
Hideyuki Ohnishi ◽  
...  
Keyword(s):  
Electrical Stimulation ◽  
Motor Cortex ◽  
Evoked Potentials ◽  
Success Rate ◽  
Motor Evoked Potentials ◽  
Single Pulse ◽  
Dependent Manner ◽  
Dose Dependent ◽  
Pulse Stimulation ◽  
Stimulation Of

Background The clinical application of intraoperative motor-evoked potentials (MEPs) has been hampered by their sensitivity to anesthetics. Recently, to overcome anesthetic-induced depression of myogenic MEPs, multiple stimulus setups with a paired or a train of pulses for stimulation of the motor cortex were reported. However, the effects of anesthetics on MEPs induced by these stimulation techniques are unknown. Methods Bipolar electrical stimulation of the left motor cortex was carried out in 15 rats anesthetized with thiopental while the compound muscle action potentials were recorded from the contralateral hind limb. After recording of the MEP in response to the single-shock stimulation of the motor cortex, paired pulses (double pulses) or a train of three pulses (triple pulses) with an interstimulus interval of each pulse at 0.3, 0.5, 1.0, 1.5, and 2.0 ms were applied. After control MEP recording, isoflurane was administered at a concentration of 0.25 minimum alveolar anesthetic concentration (MAC), 0.5 MAC, 0.75 MAC, and 1.0 MAC, and the effects of isoflurane on the MEPs induced by single, double, and triple pulses were evaluated. Results In all animals, distinct baseline MEPs were recorded. During the administration of 0.25 MAC and 0.5 MAC isoflurane, MEPs induced by stimulation with a single pulse could be recorded in 87% and 33% of animals, respectively, and MEP amplitude was significantly reduced in a dose-dependent manner. During the administration of 0.75 MAC isoflurane, MEPs after single-pulse stimulation could not be recorded in any animals. By stimulating with paired or triple pulses, the success rate of MEP recording and MEP amplitude significantly increased compared with those after single pulse before and during the administration of isoflurane. Both the success rate of MEP recording and MEP amplitude after double- and triple-pulse stimulation decreased significantly in a dose-dependent manner during the administration of isoflurane. Conclusions Application of double or triple stimulation of the motor cortex increases the success rate of MEP recording and its amplitude during isoflurane anesthesia in rats. However, these responses are suppressed by isoflurane in a dose-dependent manner.

Magnetic stimulation of motor cortex during response preparation

1997 ◽  
Author(s):  
Allen Osman ◽  
Thierry Hasbroucq ◽  
Camille Possamai ◽  
Boris Burle
Keyword(s):  
Motor Cortex ◽  
Magnetic Stimulation ◽  
Response Preparation ◽  
Stimulation Of
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