Table 1: Example aperiodic exponents for human voltage spectra reported in the literature.
The mean value of the aperiodic exponent () reported in the reference listed in column Reference. Additional details include recording modality, number of subjects n, frequency range analyzed, and experimental condition. Considering only those studies with minimum frequencies ≥20 Hz (yellow highlighted rows), the aperiodic exponent has mean −3.1, lower quartile −4, and upper quartile −2.5.
| β | Reference | Recording modality | Frequency | Experimental condition |
|---|---|---|---|---|
| −0.08 | (Colombo et al., 2019) | Scalp EEG (n=5) | 20-40 Hz | Anesthesia (Ketamine) |
|
| ||||
| −1.12 | (Lanzone et al., 2022) | Scalp EEG (n=16) | 1-40 Hz | Eyes closed |
| −1.3 | (Adelhöfer et al., 2021) | Scalp EEG (n=74) | 2-40 Hz | Behavioral experiments |
| −1.44 | (Adelhöfer et al., 2021) | Scalp EEG (n=74) | 2-40 Hz | Behavioral experiments |
| −1.48 | (Lanzone et al., 2022) | Scalp EEG (n=18) | 1-40 Hz | Stroke patients |
| −1.51 | (Robertson et al., 2019) | Scalp EEG (n=78) | 4-50 Hz | Resting state |
| −1.67 | (Robertson et al., 2019) | Scalp EEG (n=76) | 4-50 Hz | Resting state |
|
| ||||
| −1.84 | (Lendner et al., 2020) | Scalp EEG (n=9) | 30-45 Hz | Wakefulness |
|
| ||||
| −1.86 | (Fransson et al., 2013) | Scalp EEG (n=7) | 0.2-30 Hz | Sleep |
|
| ||||
| −1.87 | (Lendner et al., 2020) | Scalp EEG (n=14) | 30-45 Hz | Resting state |
| −2.03 | (Colombo et al., 2019) | Scalp EEG (n=5) | 20-40 Hz | Wakefulness |
|
| ||||
| −2.07 | (Fransson et al., 2013) | Scalp EEG (n=15) | 0.2-30 Hz | Sleep |
| −2.32 | (Freeman et al., 2000) | Intracranial EEG (n=5) | 0.5-150 Hz | Resting state |
| −2.33 | (Bódizs et al., 2021) | Scalp EEG (n=175) | 2-48 Hz | NREM sleep |
| −2.44 | (He et al., 2010) | Intracranial EEG (n=5) | 1-100 Hz | Wakefulness |
|
| ||||
| −2.48 | (Colombo et al., 2019) | Scalp EEG (n=5) | 20-40 Hz | Wakefulness |
|
| ||||
| −2.71 | (G. Horváth et al., 2022) | Scalp EEG (n=251) | 2-48 Hz | NREM sleep |
| −2.73 | (Bódizs et al., 2021) | Scalp EEG (n=175) | 2-48 Hz | NREM sleep |
|
| ||||
| −2.75 | (Lendner et al., 2020) | Intracranial EEG (n=12) | 30-45 Hz | Wakefulness |
|
| ||||
| −2.87 | (He et al., 2010) | Intracranial EEG (n=5) | 1-100 Hz | Slow wave sleep |
|
| ||||
| −2.99 | (Lendner et al., 2020) | Intracranial EEG (n=10) | 30-45 Hz | Wakefulness |
| −3.1 | (Lendner et al., 2020) | Scalp EEG (n=9) | 30-45 Hz | Anesthesia |
| −3.13 | (Colombo et al., 2019) | Scalp EEG (n=5) | 20-40 Hz | Wakefulness |
| −3.46 | (Lendner et al., 2020) | Scalp EEG (n=14) | 30-45 Hz | N3 Sleep |
| −3.59 | (Colombo et al., 2019) | Scalp EEG (n=5) | 20-40 Hz | Anesthesia (Xenon) |
| −3.67 | (Lendner et al., 2020) | Scalp EEG (n=14) | 30-45 Hz | N2 Sleep |
| −3.69 | (Lendner et al., 2020) | Intracranial EEG (n=10) | 30-45 Hz | N3 Sleep |
| −4 | (Miller et al., 2009) | Intracranial EEG (n=20) | 80-500 Hz | Behavioral experiments |
| −4.15 | (Lendner et al., 2020) | Intracranial EEG (n=10) | 30-45 Hz | REM sleep |
| −4.34 | (Lendner et al., 2020) | Intracranial EEG (n=12) | 30-45 Hz | Anesthesia |
| −4.36 | (Colombo et al., 2019) | Scalp EEG (n=5) | 20-40 Hz | Anesthesia (Propofol) |
| −4.73 | (Lendner et al., 2020) | Scalp EEG (n=14) | 30-45 Hz | REM sleep |