Proceedings of the Third International Workshop on Advances in Electrocorticography

Abstract

The Third International Workshop on Advances in Electrocorticography (ECoG) was convened in Washington, DC, on November 10-11, 2011. As in prior meetings, a true multidisciplinary fusion of clinicians, scientists, and engineers from many disciplines gathered to summarize contemporary experiences in brain surface recordings. The proceedings of this meeting serve as evidence of a very robust and transformative field but will yet again require revision to incorporate the advances that the following year will surely bring.

Figure 1

Flexible, high-resolution multiplexed electrode array. This photograph shows a high-density active electrode array with 360 electrodes that cover 10 × 9 mm. Each electrode is sized 300 × 300 μm, and electrodes are spaced 500 μm apart.

Figure 2

Model for mesoscale neocortical oscillatory interactions. (A) Interactions between two neocortical brain regions (represented by blue and orange circles) can be statistically assessed via long-range low-frequency coherence (e.g., 4-8 Hz theta coherence). (B) Concurrently, within a region, theta phase is co-modulated with broadband gamma amplitude, which reflects the integrated local neuronal population firing rate. (C) Such phase/amplitude coupling is statistically assessed as a non-uniformity in the distribution of the amplitude of one frequency by the phase of another. We propose that when two coherent brain regions are synchronized, they communicate via low-frequency phase-dependent modulations of broadband gamma amplitude.