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Biomedical subjects

S Legg

Publications and source records attributed to S Legg.

8 recordsLinked to original sources
PubMed1995

Effects of mild hypoxia on perceptual-motor performance: a signal-detection approach.

Twelve healthy male subjects were required to make speeded judgements concerning the orientation of visual stimuli while breathing air at reduced partial pressure in a hypobaric chamber at altitudes of 7000 and 12,000 ft. A control condition was also conducted at sea level, and subjects received practice on the task at sea level prior to the commencement of the experiment. Significantly slower response times were obtained at 7000 and 12,000 ft relative to sea level. A signal-detection analysis showed that accuracy of judgement was significantly poorer at 12,000 ft, but oxygen deprivation has no systematic effect on response criterion.

Adult↗
PubMed1995

Effects of exposure to simulated altitudes on visual fields, contrast sensitivity, and dazzle recovery.

Previous studies have shown that visual performance may be impaired at altitudes above 12,000 ft when supplementary oxygen is not used. What is not known is whether there may be subtle changes in visual function at altitudes to which airline cabins are usually pressurized. In this study, we measured spatial and temporal contrast sensitivity, central visual field thresholds, and macular photostress recovery time in 12 male subjects at sea level and at simulated altitudes of 7000 ft and 12,000 ft. Our results showed insignificant changes in spatial and temporal contrast sensitivity, central visual field thresholds and dazzle recovery time with respect to simulated altitudes.

Adult↗
PubMed1990

Memory factors in age-related differences in simple reasoning.

Adults in their 50s were compared with adults in their late teens or 20s in the accuracy of relatively simple reasoning decisions involving varying amounts of information. Because the magnitude of the age differences in decision accuracy was independent of the amount of information relevant to the decision, it was suggested that adults in their 20s and 50s do not differ in the effectiveness of integrating information across multiple premises. However, the 2 groups differed in the accuracy of trials involving only a single relevant premise, and thus it was inferred that 1 factor contributing to reasoning differences within the age range from 20 to 60 may be a failure to encode, or retain, relevant information.

Adult↗
PubMed1987

Fine needle aspiration cytology in breast disease management--a 4 year experience.

At the Queen Victoria Medical Centre between 1981 and 1984, 2920 fine needle aspirates of the breast were examined with an overall diagnostic accuracy of 97% and a sensitivity of 80%. This high diagnostic accuracy combined with the ease and complication-free nature of the procedure has meant that fine needle aspiration (FNA) has become an important part of the investigation and management of breast disease within the breast service of the Queen Victoria Medical Centre.

Australia↗
PubMedDate not supplied

Planning nursing resources.

In the UK the health service is undergoing radical changes to become more responsive to local needs, consumer feedback and modern medical technology. To keep up with this constantly changing health care environment, nurse resource planning must be flexible and responsive. Below, an outline of some of the information, tools and skills required to formulate nursing resource plans.

Education, Nursing↗