TY - JOUR
T1 - Transcranial magnetic stimulation-induced changes in EEG and responses recorded from the scalp of healthy humans
AU - Izumi, Shin Ichi
AU - Takase, Moriichiro
AU - Arita, Motohide
AU - Masakado, Yoshihisa
AU - Kimura, Akio
AU - Chino, Naoichi
PY - 1997/8/1
Y1 - 1997/8/1
N2 - We determined the changes and responses in the electroencephalogram (EEG) induced by transcranial magnetic stimulation (TMS) of the scalp of five healthy men. The center of a circular coil was positioned at the vertex, and 80 stimulations were administered clockwise with the maximum output of electric current. To reduce stimulus artifacts, we created a circuit that blocked the input for 150 ms after stimulation. EEGs were recorded from F3,4, C3,4, P3,4, and T3,4. The following results were obtained: (1) slowing of the EEG was observed immediately (150 m) after each stimulation. The incidence of changes ranged from 25-80%; their duration ranged from 200-600 ms. (2) Electroencephalographic responses in the averaged form appeared as gentle positive waves. In some subjects and leads, 1 to 3 negative peaks were fused. The methods used in the present study may be useful in evaluating the sensitivity to TMS of patients with stroke and other types of brain injury.
AB - We determined the changes and responses in the electroencephalogram (EEG) induced by transcranial magnetic stimulation (TMS) of the scalp of five healthy men. The center of a circular coil was positioned at the vertex, and 80 stimulations were administered clockwise with the maximum output of electric current. To reduce stimulus artifacts, we created a circuit that blocked the input for 150 ms after stimulation. EEGs were recorded from F3,4, C3,4, P3,4, and T3,4. The following results were obtained: (1) slowing of the EEG was observed immediately (150 m) after each stimulation. The incidence of changes ranged from 25-80%; their duration ranged from 200-600 ms. (2) Electroencephalographic responses in the averaged form appeared as gentle positive waves. In some subjects and leads, 1 to 3 negative peaks were fused. The methods used in the present study may be useful in evaluating the sensitivity to TMS of patients with stroke and other types of brain injury.
KW - Artifact-interrupting circuit
KW - Electroencephalography
KW - Evoked potentials
KW - Healthy humans
KW - Safety
KW - Transcranial magnetic stimulation
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U2 - 10.1016/S0013-4694(97)00007-2
DO - 10.1016/S0013-4694(97)00007-2
M3 - Article
C2 - 9277634
AN - SCOPUS:0031213775
SN - 0013-4694
VL - 103
SP - 319
EP - 322
JO - Electroencephalography and Clinical Neurophysiology
JF - Electroencephalography and Clinical Neurophysiology
IS - 2
ER -