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Table 1 Primary absolute average power brain signals, as the EEG delivered them, from the nine young women.

From: Coincident frequencies and relative phases among brain activity and hormonal signals

Brain signals (Hz) (absolute power)

Day

1

3

7

8

13

14

20

21

24

25

Delta

388.7

399.0

336.8

402.6

366.8

376.2

388.6

375.3

382.8

396.3

Theta

374.5

359.4

362.9

368.5

339.6

346.9

384.9

320.9

373.4

363.7

Alpha1

378.6

329.6

417.3

323.5

331.5

283.6

413.0

304.4

390.7

360.0

Alpha2

230.5

231.3

194.6

270.3

256.4

345.1

262.5

264.7

274.5

392.1

Beta1

137.0

154.8

129.4

137.5

126.8

134.2

135.6

145.7

160.4

130.5

Beta2

172.5

167.1

156.6

159.0

139.3

144.2

146.4

170.6

213.5

140.8

  1. Menstrual cycle days are divided as follows: 1,3: Menstrual phase; 7,8: Follicular phase; 13,14: Ovulatory phase; 20,21: Early luteal phase; 24,25: Late luteal phase.