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The partial pressure of carbon dioxide in the arterial blood (PaCO2) is usually tightly regulated, yet it varies among healthy people at rest (range approximately 32-44 mmHg) as well as within an individual during many natural life situations. The present study examined whether modest changes in end-tidal PCO2 (PETCO2; a noninvasive measure of PaCO2) affect(More)
The distribution of diaphragm potentials over the chest surface was recorded with electrode arrays along midaxillary, midclavicular, or sternal lines in 14 normal adults. The surface pattern of phasic inspiratory EMGs when subjects were supine, relaxed, and breathing quietly, was consistent with a diaphragm source. This pattern was obtained when the(More)
February 1997 issue, concludes that individuals may be cognitively intact despite severe Alzheimer's-type changes in the brain. His conclusion, based on Sister Mary's apparent cognitive intactness at the time of her death at age 101, is doubtful. The evidence for Sister Mary's cognitive integrity was a Mini-Mental State Examination (MMSE) score of 27 out of(More)
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