Short Sharp Spikes (Pathological)
- Definition: Brief epileptiform discharges indicative of underlying cortical irritability or epilepsy.
- Characteristics:
- Typically higher amplitude (>50 µV)
- Slightly longer duration, clearer epileptiform morphology
- Often focal, associated with cortical abnormalities or epilepsy syndromes
- Commonly accompanied by aftergoing slow-wave components
- Can occur at any sleep stage or awake state
- Clinical Significance: Often associated with epilepsy or underlying neurological disorders
cf Small Sharp Spikes (BETS)
| Feature | Small Sharp Spikes (BETS) | Short Sharp Spikes (Pathologic) |
|---|---|---|
| Amplitude | <50 µV | Usually >50 µV |
| Duration | <50 ms | Typically slightly longer, clearer epileptiform morphology |
| Localization | Bilateral temporal, independent | Usually focal, cortical irritability |
| Sleep Stage | Drowsiness/N1-N2 sleep stages | Any sleep stage or awake |
| Aftergoing Slow Wave | Typically absent | Frequently present |
| Clinical Relevance | Benign EEG variant | Often pathologic, associated with epilepsy |
