A digital electroencephalograph (Neurofax EEG-9100, NIHON KOHDEN, Shinjuku-ku, Japan) was used to record EEG (time constant, 0.3 s; high-cut filter, 60 Hz). A subdermal needle electrode (stainless steel EEG needle, length of 22.5 mm, diameter of 0.22 mm, 1.5-meter cable; NE-224s, NIHON KOHDEN, Shinjuku, Japan) was used as the recording electrode. The placement of electrodes was the same as that reported by Utsugi et al. [10 (link)]. An electrode was placed symmetrically on both sides over the frontal (LF, RF), parietal (LP, RP), occipital (LO, RO), and temporal (LT, RT) lobes. Reference electrodes were placed on the left and right ears. A ground electrode was placed on the dorsal side of the neck above the atlas. Electrodes for recording eye movement were placed near the left and right eyelids (Figure 1 ). ECG was recorded using electrodes placed on both axillae. Bilateral ear reference electrode derivation and bipolar derivation were performed.
Neurofax eeg 9100
Manufactured by Nihon Kohden
Sourced in Japan
The Neurofax EEG-9100 is a diagnostic device designed for recording and analyzing electroencephalogram (EEG) data. It is capable of acquiring and displaying EEG signals from multiple channels simultaneously.
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Lab products found in correlation
2 protocols using neurofax eeg 9100
1
EEG Recording with Subdermal Needle Electrodes
2
Standard Overnight Sleep Monitoring and Oxygen Desaturation
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Standard overnight sleep studies were performed using a computerized system (Neurofax EEG-9100, Nihon Kohden, Tokyo, Japan). Awake S pO 2 was estimated by calcu-lating the mean of these values at rest, in a sitting position, and during a 5-min period of wakefulness at the beginning of the study. Sleep staging, arousal analysis, and scoring of respiratory events during sleep were performed according to the American Academy of Sleep Medicine. 31 Significant sleep desaturation was defined as an S pO 2 during sleep of Ͻ 90% for Ն 5 min with a nadir of at least 85%. 32
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