MATHEMATICAL EXPRESSION OF RELATIONSHIP BETWEEN AUDITORY BRAINSTEM TRANSMISSION TIME AND AGE

Abstract
Brainstem transmission time (BTT) was studied in 71 subjects ranging in age from 1 day to 29 yr in order to find a mathematical expression to best describe the relationship between BTT and age. The mathematical function which relates BTT to age is exponential. Using these data, the BTT confidence limit was calculated for subjects from birth to 8 yr. Repeated recordings of auditory brainstem responses were performed in several children as they grew older and these verified the normal maturational processes of the brainstem structures in the developing infant and young child.