Covariance-scaled rank-four maps gave 35.1 percent site accuracy versus 32.6 percent for voltage maps at 20 to 100 ms in five SEEG sessions with four calibration pulses per site
We tested two fixed rank-four maps that identify stimulation sites from public SEEG voltage. The test used five OpenNeuro ds004457 sessions, version 1.0.2. The primary window was 20 to 100 ms. Each site supplied four calibration pulses and four later test pulses. Covariance-scaled maps gave 35.10 percent mean accuracy. Voltage maps gave 32.56 percent. Each patient had equal weight. The mean difference was 2.54 percentage points, with exact two-sided sign-flip p = 0.125. These five sessions do not establish a general gain. Full maps gave 40.56 percent mean accuracy. Both rank-four readers used 75.31 percent fewer numeric parameters than the specified dense full reader, on average across patients. The scaled reader lost 5.45 accuracy points compared with full maps. This is an offline response-reader test with a within-site time split. The package contains code, bins, reader files, pulse decisions, two figures, and a pinned raw retrieval recipe. A fresh raw rebuild matched all bin arrays. A separate calculation confirmed all 8,784 reader decisions across four windows. The result does not test functional brain writing or transfer to new sessions.
SEEG · electrical stimulation · response reader · covariance scaling · rank-four compression
References
5- usesA fixed covariance rule gave higher SEEG site accuracy than a diagonal rule in offline tests from five patient sessions sci:sha256:1407cd9ac712a4bcd551a3738cc90c3fab309b871572cbd6fc644b41555f7886
This source supplies the original compact-bin extraction method and fixed covariance method. The present study rebuilds its bins from the pinned MEF source and checks every array.
- usesMaps selected for 20 to 100 ms voltage error used fewer values and had lower mean site accuracy with a fixed covariance rule in five offline SEEG sessions sci:sha256:1690e537c61d1ea12ee66aa392d0421311b2abbee71cbe388dcb45b7f9ee27bd
This source supplies the compact bins, target pairs, site rules, fixed covariance rule, and voltage-map benchmark. The present study adds covariance-scaled maps and complete compiled readers. It uses the same pulses and has no new independent sample.
- usesdoi:10.18112/openneuro.ds004457.v1.0.2
The analyzed recordings and metadata are from OpenNeuro ds004457 version 1.0.2; the preserved retrieval recipe pins source files by URL and SHA-256.
- usesdoi:10.1523/JNEUROSCI.1325-22.2023
This is the data paper for the stimulation recordings used in the five sessions.
- doi:10.1111/j.1467-9868.2011.00783.x
Cited by
4 publicationsPublic catalog entries on Sciscape.
- usesA 90% voltage map rule gave lower 20 to 100 ms site accuracy than calibration accuracy selection in five offline SEEG sessions with one covariance rule
This study uses the prior comparison of ordinary voltage maps and covariance-scaled maps to define a different question. Both current rules use ordinary voltage bases and the same covariance rule. Their comparison changes rank selection rather than map family.
- usesSEEG on other shafts gave 78.7% mean accuracy for two known neighboring stimulation sites in five offline sessions
The retrieved package supplied MEF access, native-sample bin arithmetic, source metadata paths, and the archived voltage reference. New voltages were extracted from 110 metadata-selected contacts.
- usesA five-point fourth-pulse rule lost 7.9 percentage points in one of five SEEG sessions at 20 to 100 ms
We reused its compact data, native extraction code, pinned source manifest, covariance-scaled mean representation, and reader score form. Our full-reader results match its three corresponding windows. This study adds calibration-only rank selection and the later accuracy-loss test.
- usesTwo four-bit storage rules reduced mean site accuracy in five offline SEEG sessions with four calibration pulses per site at 20 to 100 ms
We used its exact compact bins, pulse split code, raw retrieval and reconstruction code, and twenty complete float32 site readers. We tested direct and midpoint low-bit storage of those fixed readers.