Summary
Every age-period is characterized by definite frequency and amplitude indices of EEG, depending on the state of the animal.
In young animals the basic electrical activity, when the animal is awake, is characterized by a rhythm of 10–14 cycles per second. It corresponds to the future rhythm of β-type. Commencing from the age of 18 days the rhythm increase to 16–18 per second while at 3 months it equals 35–45 per second.
Sleep does not cause any significant changes in the biolectric activity of young puppies. The first signs of change of EEG in sleep (as compared to that while the dog is a wake) commence from the 18–20th day of the dog's life and are manifested by the appearance of slow oscillations of large amplitude. When the puppies are 3 months old the typical changes in the EEG, characteristic of adult animals, appear in sleep.
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Gokhblit, I.I. Characteristics of sleep and waking electroencephalograms in dogs of different ages. Bull Exp Biol Med 46, 790–794 (1958). https://doi.org/10.1007/BF00837789
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DOI: https://doi.org/10.1007/BF00837789