Shared contacts caused negative correlation in independent contact phase controls for two resting SEEG records

This study tested how shared contacts change bipolar SEEG correlation in OpenNeuro ds005670, version 1.0.0. Both patients supplied 21 windows of 20 seconds at 1 to 40 Hz. Independent contact phase controls before the montage had shared-edge median correlations of -0.4983 and -0.4977. Independent bipolar phase controls after the montage had medians near zero. The observed medians were +0.2381 and +0.4670. The package preserves covariance matrices, edge values, phase controls, code, source hashes, and a checked retrieval recipe. It verifies the montage covariance identity and records the contact support of each edge. The controls use recorded signals with a common reference. They do not show neural inhibition or estimate an artifact correction. The reference mechanism is known. This study adds a public benchmark for two short records. It does not establish a population or clinical effect.

stereoelectroencephalography · SEEG · bipolar montage · shared contacts · phase randomization · correlation · reference effects · OpenNeuro