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Panagiotides H, Freeman WJ, Holmes MD, et al. Behavioral states may be associated with distinct spatial patterns in electrocorticogram. Cogn Neurodyn. 2010;5(1):55-66doi: 10.1007/s11571-010-9139-4.
Panagiotides, H., Freeman, W. J., Holmes, M. D., & Pantazis, D. (2011). Behavioral states may be associated with distinct spatial patterns in electrocorticogram. Cognitive neurodynamics, 5(1), 55-66. https://doi.org/10.1007/s11571-010-9139-4
Panagiotides, Heracles, et al. "Behavioral states may be associated with distinct spatial patterns in electrocorticogram." Cognitive neurodynamics vol. 5,1 (2011): 55-66. doi: https://doi.org/10.1007/s11571-010-9139-4
Panagiotides H, Freeman WJ, Holmes MD, Pantazis D. Behavioral states may be associated with distinct spatial patterns in electrocorticogram. Cogn Neurodyn. 2011 Mar;5(1):55-66. doi: 10.1007/s11571-010-9139-4. Epub 2010 Nov 13. PMID: 21464836; PMCID: PMC3045495.
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Cogn Neurodyn. 2011 Mar;5(1):55-66. doi: 10.1007/s11571-010-9139-4. Epub 2010 Nov 13.

Behavioral states may be associated with distinct spatial patterns in electrocorticogram.

Cognitive neurodynamics

Heracles Panagiotides, Walter J Freeman, Mark D Holmes, Dimitrios Pantazis

PMID: 21464836 PMCID: PMC3045495 DOI: 10.1007/s11571-010-9139-4

Abstract

To determine if behavioral states are associated with unique spatial electrocorticographic (ECoG) patterns, we obtained recordings with a microgrid electrode array applied to the cortical surface of a human subject. The array was constructed with the intent of extracting maximal spatial information by optimizing interelectrode distances. A 34-year-old patient with intractable epilepsy underwent intracranial ECoG monitoring after standard methods failed to reveal localization of seizures. During the 8-day period of invasive recording, in addition to standard clinical electrodes a square 1 × 1 cm microgrid array with 64 electrodes (1.25 mm separation) was placed on the right inferior temporal gyrus. Careful review of video recordings identified four extended naturalistic behaviors: reading, conversing on the telephone, looking at photographs, and face-to-face interactions. ECoG activity recorded with the microgrid that corresponded to these behaviors was collected and ECoG spatial patterns were analyzed. During periods of ECoG selected for analysis, no electrographic seizures or epileptiform patterns were present. Moments of maximal spatial variance are shown to cluster by behavior. Comparisons between conditions using a permutation test reveal significantly different spatial patterns for each behavior. We conclude that ECoG recordings obtained on the cortical surface with optimal high spatial frequency resolution reveal distinct local spatial patterns that reflect different behavioral states, and we predict that similar patterns will be found in many if not most cortical areas on which a microgrid is placed.

Keywords: Behavioral states; EEG; Epilepsy; Neural circuits; Perception; Spatial EEG patterns

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