Birth asphyxia and delta response to over-breathing in non-epileptic children.

no definite, infallible relationship has yet been observed between any single factor or group of factors and the appearance of delta rhythms on over-breathing (Dawson and Greville, 1963). Brill and Seidemann (1941) showed that 40% of normal children between 4 and 6 years of age developed 2-6 c/s waves on over-breathing. They concluded that such waves appearing on overbreathing cannot be considered as abnormal because of their high incidence, particularly in young children. Gibbs, Gibbs, and Lennox (1943) demonstrated the appearance of large slow waves on overbreathing in 70% of normal children between 3 and