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Biomedical subjects

D G Jamieson

Publications and source records attributed to D G Jamieson.

7 recordsLinked to original sources
PubMed1990

Studies of respiratory stridor in young children: acoustical analyses and tests of a theoretical model.

Non-invasive procedures are proposed to aid the diagnosis of childhood laryngotracheal pathology and to monitor the course of such disease. The procedures capitalize on the one-to-one relationship which exists between the acoustic phenomena (stridors) associated with respiration and the configuration of the respiratory tract. Careful analysis of these acoustic patterns can thus assist in identifying and localizing constrictions, in diagnosis, and in monitoring disease severity. Based on the acoustical analysis of the stridor generated by children with congenital stridor, subglottal laryngitis, and trachea stenosis, the present paper demonstrates that a close relationship exists between the specific pathology and the spectrum of the associated respiratory stridor.

Acoustics↗
PubMed1978

Feedback versus an illusion in time.

The accuracy of many perceptual comparisons depends greatly on the order in which the to-be-compared stimuli are presented. With comparisons of durations around 300 ms, these presentation-order effects do not diminish, even with extended practice, when feedback about response accuracy is withheld. Providing such feedback greatly diminishes presentation-order effects and coincidentally produces substantial increases in response accuracy. The feedback acts in part through inducing response biases and in part through changes in sensitivity. The contradiction between studies which report time-order errors in duration comparison and those which do not is attributable to differences in the use of information feedback.

Discrimination, Psychological↗
PubMed1975

Non-healing granuloma and the nervous system.

Three cases of non-healing granuloma with neurological complications are described. One case suffered from Stewart's form of the disease and two from Wegener's variety. The literature is extensively reviewed and the incidence and manner of neurological involvement in 374 cases is discussed. We suggest a classification to indicate four forms of nervous system involvement. First, granulomatous lesions of the central nervous system. Second, vasculitis of the central nervous system. Third, vasculitis of the peripheral nervous system and fourth, infection of the central nervous system. Of all cases 21 per cent had some form of neurological complication. Wegener's type showed more frequent neurological involvement that Stewart's, 26-5 and 12 per cent respectively. Infection of the central nervous system was limited to cases of the Stewart variety.

Adult↗