RESUMO
In a study investigating factors affecting labour pain, 10 out of 97 subjects reported that they had never experienced any pain outwit childbirth. These subjects experienced comparatively low levels of pain within childbirth. They did not differ significantly from the majority of subjects on a large number of obstetric and psychological factors which normally affect pain in labour. It was suggested that these subjects were relatively insensitive to noxious stimulation, in that they do not experience pain when noxious stimulation is mild or moderate (as for example a consequence of menstruation, common accidents or ailments) and experience lower than average levels of pain when noxious stimulation is intense as in labour. Further investigation of such subjects is of theoretical interest and practical importance since it might allow for accurate prediction of pain levels in a proportion of parturants.
Assuntos
Trabalho de Parto/fisiologia , Medição da Dor , Limiar Sensorial , Adolescente , Adulto , Analgésicos/uso terapêutico , Peso ao Nascer , Feminino , Humanos , Trabalho de Parto Induzido , Trabalho de Parto/psicologia , Paridade , Gravidez , Complicações na Gravidez/psicologiaAssuntos
Comportamento Animal , Trabalho de Parto , Prenhez , Primatas/fisiologia , Vocalização Animal , Animais , Feminino , Humanos , Dor/veterinária , GravidezRESUMO
Localized changes in oxygen tension were recorded with platinum cathodes placed in the lateral geniculate nucleus in both anesthetized and awake cats. The amplitude of the responses increased with increasing stimulus intensity, but decreased with increasing flash rate. Both increases and decreases in cathode current were produced by steady illumination. The characteristics of the responses suggest that the responses reflect localized variations in blood flow, produced in turn by changes evoked in the tonic neural activity of the lateral geniculate nucleus.
