Neural Noise- Repetitive wide-band cortical power patterns are observed in benign adult familial myoclonus epilepsy (BAFME).1
- EEG spectral and cortical power analysis characterizes this epilepsy syndrome.1 1
Weekly enrichment (2026-07-20)
- The study applied somatosensory-induced time–frequency cortical activity analysis (Si-TiFCA) to somatosensory evoked potentials (SEPs) to probe the rhythmic mechanism of cortical tremor in benign adult familial myoclonus epilepsy (BAFME).1
- Cohort comprised 46 SEP datasets from 23 patients (11 BAFME, 12 with other cortical myoclonus) plus 35 SEPs from 18 healthy controls.1
- SEPs were recorded with 1.1-Hz peripheral stimulation at a 10,000-Hz sampling rate, with a short-time Fourier transform analyzed over a 0–150 ms window and 0–1000 Hz frequency range.1
- Wide-band (0–1000 Hz) stimulus-induced power changes were markedly more prominent in BAFME than in other cortical myoclonus or controls, appearing as repetitive, alternating increases and decreases in power.1
- The number of induced activities peaked in patients in their 40s and declined with advancing age.1
- Under perampanel (PER) treatment the slow late component was prolonged and correlated positively with PER concentration, with associated power increases near 156 Hz (all patients) and 624 Hz (BAFME) underlying that component.1
- Independent work established high-frequency oscillations on the giant SEP P25 (P25-HFOs, 400–1000 Hz band) as a BAFME biomarker with 100% sensitivity and 87.9% specificity across 49 cortical-myoclonus patients (16 BAFME, 33 other).2
- Reviews describe BAFME cortical hyperexcitability signatures including giant SEPs (P25 >8.6 µV, N33 >8.4 µV), the C-reflex, and posterior “spiky alpha”/elevated posterior beta power.3 4
- Clinical/BCI implication: wide-band induced-power signatures could complement giant SEPs and P25-HFOs as noninvasive EEG biomarkers distinguishing BAFME from other cortical myoclonus.1 2