Real-time functional brain mapping using electrocorticography

We demonstrate the feasibility of real-time cortical mapping from arrays of subdural electrodes using the electrocorticographic signal power in the higher spectral frequencies (76–200 Hz, or “χ-index”). Hand area was mapped offline in eight individuals using brief baseline and hand-movement measurements. In one patient, hand sensorimotor cortex was identified online during a handshake. We propose that this high-frequency component of the electrocorticogram provides a generic, reliable, clinically useful correlate of local cortical function.

Authors

• Kai J. Miller
• Marcel denNijs
• Pradeep Shenoy Google Research India
• John W. Miller
• Rajesh P.N. Rao
• Jeffrey G. Ojemann

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