Physiological markers in early infancy: Stability of 1- to 6-month vagal tone

Author(s): Bryan, Y. E., Hsu, H. C.

Journal/Book: Infant Behav Develop. 1995; 18: 355 Chestnut St, Norwood, NJ 07648. Ablex Publ Corp. 363-367.

Abstract: Twenty-six full-term infants were evaluated at 1-, 3-, and 6-months postpartum to explore the stability of Forges' (1985a) cardiac vagal tone index. One-month vagal tone ((V) over cap) was not found to be associated with either 3- or 6-month measures of cardiac vagal tone, however, 3-month cardiac vagal tone was found to be predictive of 6-month cardiac vagal tone. Interestingly, 1-month heart period range was predictive of 6-month heart period range. These findings both replicate and extend previous research examining early patterns of development in cardiac indices.

Note: Note YE Bryan, Lehigh Valley Hosp Ctr, Off Profess Dev, POB 689, Allentown, PA 18105 USA

Keyword(s): cardiac vagal tone; early infancy; heart-rate variability; developmental shifts; physiological markers; stability; VISUAL SUSTAINED ATTENTION; SINUS ARRHYTHMIA; TEMPERAMENT

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