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Biomedical subjects

D Landon

Publications and source records attributed to D Landon.

8 recordsLinked to original sources
PubMed1988

In vitro interaction of M. leprae-infected Schwann cells and splenic cells.

The interaction between M. leprae-infected cultured Schwann cells and sensitized splenic cells was noted both under light and electron microscopy. No evidence of cytomorphological changes in infected Schwann cells was obtained. However, sensitized splenic cells were noted to undergo degenerative changes suggestive of the phenomenon of apoptosis. Subsequently a large number of these degenerated cells were observed within the Schwann cell. Such a process has not been hitherto reported in the histopathology of leprous nerves. Nevertheless, these findings indicate an aberrant metabolic function in M. leprae-infected Schwann cells.

Animals↗
PubMed1982

Do learning-disabled children exhibit peripheral deficits in selective attention? An analysis of eye movements during reading.

It has been suggested that deficits in selective attention play a functional role in the learning and behavior problems of children diagnosed as learning-disabled. In the present study, peripheral and central aspects of selective attention were distinguished and peripheral aspects were examined. The attending eye movements during reading of 12 fifth-grade learning-disabled children who read at the third-grade level were compared with 12 fifth-grade children who read at the fifth-grade level (grade placement controls) and 12 third-grade children who read at the third-grade level (reading level controls). The learning-disabled children did not differ from their reading level controls on any of 10 measures but showed a pattern of eye movements that was generally slower and less smooth than their grade placement controls. While these patterns might be considered to be "immature" relative to normal readers of the same age, they are not indicative of peripheral deficits in selective attention. Males, however, did exhibit more variability in duration of fixations and made more regressive eye movements than did females.

Achievement↗