RESUMO
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.
Assuntos
Cocaína/efeitos adversos , Estresse Fisiológico/induzido quimicamente , Peso ao Nascer/efeitos dos fármacos , Feminino , Idade Gestacional , Humanos , Recém-Nascido , Masculino , Troca Materno-Fetal , Perinatologia , Exame Físico , Gravidez , Reflexo Anormal/efeitos dos fármacos , Estresse Fisiológico/fisiopatologiaRESUMO
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.
