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Table 1 Descriptive data of the EEG alpha peak

From: Regional differences in trait-like characteristics of the waking EEG in early adolescence

Derivation Eyes closed Eyes open
Week 1 Week 2 Week 3 Week 1 Week 2 Week 3
Frequency [Hz]
C3LM 9.2 (±1.2) 9.2 (±1.1) 9.2 (±1.2) 9.3 (±1.3) 9.1 (±1.1) 9.4 (±1.3)
C4LM 9.2 (±1.1) 9.2 (±1.2) 9.2 (±1.2) 9.4 (±1.2) 9.1 (±1.2) 9.3 (±1.1)
O1LM 9.7 (±0.7) 9.6 (±0.8) 9.5 (±0.7) 9.7 (±0.7) 9.5 (±0.7) 9.4 (±0.8)
O2LM 9.6 (±0.8) 9.5 (±0.8) 9.5 (±0.7) 9.5 (±0.8) 9.5 (±0.8) 9.4 (±0.7)
Height [μV 2 /Hz]
C3LM 35.20 (±35.95) 28.69 (±20.19) 32.25 (±19.35) 24.49 (±22.07) 20.47 (±16.01) 22.11 (±15.79)
C4LM 34.39 (±34.83) 30.85 (±21.26) 30.78 (±17.47) 20.99 (±17.54) 20.78 (±14.58) 25.38 (±23.16)
O1LM 140.57 (±111.26) 137.20 (±95.46) 158.81 (±127.88) 44.91 (±57.47) 63.38 (±61.77) 70.65 (±77.38)
O2LM 147.27 (±128.18) 138.68 (±127.12) 165.17 (±134.02) 49.05 (±60.47) 71.57 (±86.89) 75.57 (±90.50)
  1. Mean (standard deviation) frequency (Hz) and height (μV2/Hz) of alpha peak (7 – 12 Hz). Frequency of the peak declined in the eyes open and closed condition between weeks one and three in the left occipital derivation (O1LM). Peak height increased in the occipital derivation (O1LM and O2LM) across weeks in the eyes open condition.