Psychogenic Pseudo-responses in an Electrical Cortical Stimulation
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- TAMADA Tomoaki
- Department of Neurosurgery, Sapporo Medical University School of Medicine
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- ENATSU Rei
- Department of Neurosurgery, Sapporo Medical University School of Medicine
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- SUZUKI Yuto
- Department of Neurosurgery, Sapporo Medical University School of Medicine
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- YOKOYAMA Rintaro
- Department of Neurosurgery, Sapporo Medical University School of Medicine
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- SUZUKI Hime
- Department of Neurosurgery, Sapporo Medical University School of Medicine
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- OCHI Satoko
- Department of Neurosurgery, Sapporo Medical University School of Medicine
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- MIKUNI Nobuhiro
- Department of Neurosurgery, Sapporo Medical University School of Medicine
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Abstract
<p>An electrical cortical stimulation provides important information for functional brain mapping. However, subjective responses (i.e. sensory, visual, and auditory symptoms) are purely detected by patients’ descriptions, and may be affected by patients’ awareness and intelligence levels. We experienced psychogenic responses in the electrical cortical stimulation of two patients with intractable epilepsy. A sham stimulation was useful for differentiating pseudo-responses from real responses in the electrical cortical stimulation. Inductive questions, long testing durations, and clear cues of stimulation onsets need to be avoided to prevent psychogenic pseudo-responses in the electrical cortical stimulation. Furthermore, a sham stimulation is applicable for detecting pseudo-responses the moment patients show atypical or inexplicable symptoms.</p>
Journal
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- Neurologia medico-chirurgica
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Neurologia medico-chirurgica 59 (7), 287-290, 2019
The Japan Neurosurgical Society
