The use of a cap-shaped coil for transcranial magnetic stimulation of the motor cortex.
J Clin Neurophysiol
; 10(3): 353-62, 1993 Jul.
Article
en En
| MEDLINE
| ID: mdl-8408600
ABSTRACT
A cap-shaped coil is introduced as a superior design for inducing transcranial magnetic motor evoked potentials for spinal cord monitoring. Evaluation of the magnetic characteristics of the cap coil showed higher induced electrical fields at and below the depth of the cortical surface, compared to a 9-cm, butterfly-shaped coil. Twenty normal adults were stimulated with the cap coil and a 9-cm round coil in three positions. Compound muscle action potentials were recorded from the left and right abductor digiti minimi and anterior tibialis muscles. The cap coil induced potentials with higher intensities and lower variability between consecutive stimuli. The cap coil was also more able to simultaneously induce motor evoked potentials from the four muscles studied. This coil design should provide superior means of inducing transcranial magnetic motor evoked potentials in multiple muscles.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Electroencefalografía
/
Campos Electromagnéticos
/
Corteza Motora
/
Músculos
Límite:
Humans
Idioma:
En
Revista:
J Clin Neurophysiol
Asunto de la revista:
FISIOLOGIA
/
NEUROLOGIA
Año:
1993
Tipo del documento:
Article