ABSTRACT
The authors describe the results of click at a recurrence frequency of 10 C/S in evoked responses of the brain stem, firstly in twenty normal individuals, with headphones or in a free area, making it possible to define a range of physiological responses to the different intensities, then in seventeen pathological individuals consisting of six cases of conduction deafness and eleven of perceptive deafness. On the basis of this study, they attempt to demonstrate the value of this type of examination not only in the determination of objective auditory threshold, but also in that of the type of deafness: conductive or perceptive. The method even makes it possible to approximately define the general appearance of the frequency distribution at the threshold according to the slope of the different latencies of P5. In the opinion of the authors, the chief advantages are the decrease in the time required for the test and the possibility of its use in the study of prosthetic gain.
Subject(s)
Brain Stem/physiology , Evoked Potentials, Auditory , Adolescent , Adult , Auditory Threshold , Child , Child, Preschool , Female , Hearing Loss, Central/diagnosis , Hearing Loss, Conductive/diagnosis , Humans , Infant , Male , Time FactorsSubject(s)
Brain Stem/physiology , Evoked Potentials, Auditory , Hearing Aids , Adult , Auditory Threshold , Child , Hearing Disorders/therapy , Humans , MethodsABSTRACT
Acrokerato-elastoidosis described by Costa is characterized by numerous little keratotic points and translucent horny wheals on the dorsal aspect of hands and (or) feets. The ultrastructural study shows lesions of the elastic tissue which is very rarefied with an abnormal structure, but also demonstrates alterations of the fibroblasts that contain dense granules at the periphery of their cytoplasm without elastic extracellular fibers, suggesting a trouble in the secretion or the excretion of the elastic material.
Subject(s)
Acrodermatitis/pathology , Adolescent , Elastic Tissue/pathology , Foot Dermatoses/pathology , Hand Dermatoses/pathology , HumansABSTRACT
Acrokerato-elastoidosis described by Costa is characterized by numerous little keratotic points and translucent horny wheals on the dorsal aspect of hands and (or) feet. The ultrastructural study shows lesions of the elastic tissue which is very rarefied with an abnormal structure, but also demonstrates alterations of the fibroblasts that contain dense granules at the periphery of their cytoplasm without elastic extracellular fibers, suggesting a trouble in the secretion or the excretion of the elastic material.
