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Night–day–night sleep–wakefulness monitoring by ambulatory integrated circuit memories
Author(s) -
Yamamoto Mitsuaki,
Nakao Mitsuyuki,
Katayama Norihiro,
Waku Mituru,
Suzuki Ken,
Irokawa Kazutaka,
Abe Masato,
Ueno Takashi
Publication year - 1999
Publication title -
psychiatry and clinical neurosciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.609
H-Index - 74
eISSN - 1440-1819
pISSN - 1323-1316
DOI - 10.1046/j.1440-1819.1999.00526.x
Subject(s) - wakefulness , sleep (system call) , computer science , amplifier , computer hardware , signal (programming language) , electroencephalography , audiology , medicine , psychology , neuroscience , telecommunications , bandwidth (computing) , programming language , operating system
A medium‐sized portable digital recorder with fully integrated circuit (IC) memories for sleep monitoring has been developed. It has five amplifiers for EEG, EMG, EOG, ECG, and a signal of body acceleration or respiration sound, four event markers, an 8 ch A/D converter, a digital signal processor (DSP), 192 Mbytes IC flash memories, and batteries. The whole system weighs 1200 g including batteries and is put into a small bag worn on the subject’s waist or carried in their hand. The sampling rate for each input channel is programmable through the DSP. This apparatus is valuable for continuously monitoring the states of sleep–wakefulness over 24 h, making a night–day–night recording possible in a hospital, home, or car.