title: A phase locked loop device for automatic detection of sleep spindles and stage 2.
abstract: A method is described using phase-locked loops which, as electronic frequency detection devices, provide the basis of a relatively inexpensive system of automatic sleep spindle detection. It is acceptably reliable at quite high rates of data processing.
mesh_terms: D004569:Electroencephalography / Q000295:instrumentation*; D006801:Humans; D012890:Sleep; D012894:Sleep Stages