Comparison of Thresholds between Bipolar and Monopolar Electrical Cortical Stimulation.
Neurol Med Chir (Tokyo)
; 62(6): 294-299, 2022 Jun 15.
Article
em En
| MEDLINE
| ID: mdl-35466117
ABSTRACT
Electrical cortical stimulation is widely performed and is the gold standard for functional mapping in intractable epilepsy patients; however, a standard protocol has not yet been established. With respect to stimulation methods, two techniques can be applied monopolar and bipolar stimulation. We compared the threshold to induce clinical symptoms between these two stimulation techniques. Twenty patients with intractable epilepsy who underwent electrical cortical stimulation for functional mapping were retrospectively investigated. We evaluated the stimulation intensity thresholds required to induce motor, sensory, and language symptoms. A total of 114 electrodes in 20 patients were used to investigate motor, sensory, and language symptoms. The thresholds required to induce motor (median value, bipolar 4 mA, monopolar 5 mA, p < 0.05) and language symptoms (bipolar 8 mA, monopolar 10 mA, p < 0.0005) were significantly higher for monopolar stimulation than those for bipolar stimulation. However, for sensory symptoms, no significant differences were found in the required thresholds between monopolar and bipolar stimulation (bipolar 4 mA, monopolar 4 mA, p = 0.474). Bipolar cortical stimulation required lower intensities to produce clinical motor and language symptoms and thus would be safe and suitable for screening of the eloquent area in functional mapping.
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Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Mapeamento Encefálico
/
Epilepsia Resistente a Medicamentos
Tipo de estudo:
Diagnostic_studies
/
Guideline
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Observational_studies
Limite:
Humans
Idioma:
En
Revista:
Neurol Med Chir (Tokyo)
Ano de publicação:
2022
Tipo de documento:
Article