RESUMEN
Fifty-two newborns were assessed for the effects of maternal cocaine use on their performance on the Brazelton Neonatal Behavior Assessment Scale and on their stress behaviors during the Brazelton as tapped by the Neonatal Stress Scale. The cocaine-exposed newborns experienced more obstetric complications, had smaller head circumferences, showed more limited habituation abilities on the Brazelton Scale, and exhibited more stress behaviors than control newborns.
Asunto(s)
Cocaína/efectos adversos , Estrés Fisiológico/inducido químicamente , Peso al Nacer/efectos de los fármacos , Femenino , Edad Gestacional , Humanos , Recién Nacido , Masculino , Intercambio Materno-Fetal , Perinatología , Examen Físico , Embarazo , Reflejo Anormal/efectos de los fármacos , Estrés Fisiológico/fisiopatologíaRESUMEN
Heart period, heart period variability, and respiration frequency were observed and compared longitudinally in rats from birth to 24 days of age. In addition, V, a quantification of respiratory sinus arrhythmia derived via spectral analysis of the heart period pattern, was observed. It was hypothesized that these heart period parameters would be differentially sensitive to the neural control of the heart and would, therefore, reflect different developmental patterns. Heart period and heart period variability indicated developmental patterns consistent with the literature. The ontogeny of V suggests that it may represent the developmental pattern of tonic vagal influences on the heart.