Delta
Frequency: up to 4
Located: frontally in adults, posterity in children; high amplitude waves
Normally:
* adults slow wave sleep
* in babies
* Has been found during some continuous attention tasks (Kirmizi-Alsan et al. 2006)
Pathologically:
* subcortical lesions
* diffuse lesions
* metabolic encephalopathy hydrocephalus
* deep
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