Striatal stimulation causing movements mimicking faciobrachial dystonic seizures
Bibliographic record
Abstract
Faciobrachial dystonic seizures (FBDS) are characteristic of anti-LGI1 encephalitis. The pathophysiological mechanisms underlying FBDS are unknown, with scalp EEG correlates consistent with cortical initiation and basal ganglia hypermetabolism implicating the involvement of subcortical structures. In a patient with non-encephalitic drug-resistant temporal lobe epilepsy undergoing brain mapping during a stereotactic-EEG investigation, we identified neurophysiologic evidence that lateralized movements similar to FBDS can result from direct striatal activation. Stimulation of putaminal depth electrode contacts resulted in brief contralateral dystonic movements resembling the FBDS seen in anti-LGI1 encephalitis. The evoked movements lagged stimulation initiation and outlasted stimulation, reminiscent of the delay between scalp EEG infraslow activity and FBDS in anti-LGI1 encephalitis. Unlike FBDS in anti-LGI1 encephalitis, no scalp EEG change preceded the stimulation-induced movements. These findings suggest that the putamen may be a part of the symptomatogenic zone for anti-LGI1 encephalitis-related FBDS, and that in the encephalitic scenario transient cortical epileptic discharges are ipsilaterally propagated to the striatum to cause FBDS.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".