2017年11月3日 · Based on the cleaned EEG recordings, sleep was visually scored (derivations C3A2, F3A2, O1A2; A2 approximated by closest electrode in the EEG cap) in 20-s epochs according to standard...

Signals from C3A2 leads of healthy normal subjects, acquired from polysomnograms obtained from the Sleep Heart Health Study, were analyzed using both Sample Entropy (SaEn) and power spectral analysis (delta, theta, alpha, and beta frequency band powers).

2013年10月22日 · Comparison of sleep EEG power density spectra of frontal (F3A2) and central (C3A2) derivations at altitudes compared to baseline revealed that slow-wave activity (SWA, 0.8–4.6 Hz) in non-REM sleep was reduced in an altitude-dependent manner (∼4% at 1630 m and 15% at 2590 m), while theta activity (4.6–8 Hz) was reduced only at the highest ...

2000年11月15日 · Top panels: EEG power density (derivation C3A2) after 36 h of waking plotted relative to the mean of the first 24 h (horizontal line at 100%). Lower three panels: rise rate and statistics of linear regression (power density as a function of time awake).

2024年3月30日 · 选择EEG通道： C3A2. 使用Butterworth滤波器将信号频率限制在0.25Hz-40Hz的范围内. EEG信号分为五个频段. 通过Butterworth滤波器将它们分离. w1= 2 * 0.25 /sample_rate. w2= 2 * 40 /sample_rate. b, a = scipy.signal.butter(2, [w1,w2], 'bandpass') #配置滤波器 2 表示滤波器的阶数. filtedData = scipy.signal.filtfilt(b, a, data) #data为要过滤的信号. w1= 2 * 0.25 /sample_rate. w2= 2 * 4 /sample_rate.

EEG slow waves are the hallmark of deep NREM sleep and may reflect the restorative functions of sleep. Evidence suggests that increased sleep slow waves after sleep deprivation reflect plastic synaptic processes, and that brain-derived neurotrophic factor (BDNF) is causally involved in their homeostatic regulation.

Through the use of an Infinite Impulse Response Butterworth Band pass filter, we divided the EEG signals of C3-A2 and C4-A1 into five sub-bands. Next, we extracted sample entropy and variance...

1986年5月1日 · EEG power spectra of 12 primary, drug-free, sleep-onset insomniacs and 12 age-matched normal sleepers were compared. Subjects slept for 3 consecutive nights in the laboratory, during which EEGs from C3A2 and O~A2 were continuously recorded on FM tape, in addition to standard EOG and EMG leads.

EEG power spectra of 12 primary, drug-free, sleep-onset insomniacs and 12 age-matched normal sleepers were compared. Subjects slept for 3 consecutive nights in the laboratory, during which EEGs from C3A2 and O1A2 were continuously recorded on FM tape, in addition to standard EOG and EMG leads.

2009年8月1日 · The EEG signals were recorded from two electrodes (C3A2) that were placed on the scalp according to 10–20 electrode system. The EEG signals were filtered by a bandpass filter to select the frequency band between 0.5–35 Hz. The sampling rate for that band was selected as 200 Hz with 8 bit resolution according to Nyquist theorem.