The lower scores on neuropsychological tests indicate dysfunctions in memory, new learning ability, attention and concentration, tracking skills, visuomotor skills, abstract thinking, and visuospatial planing and processing. These dysfunctions correspond with previous reports of carbon monoxide neurotoxic effects in patients with moderate carbon monoxide poisoning. Low-level exposure to carbon monoxide results in impairment of higher cognitive functions. Neuropsychological testing appears to be sensitive in the detection of subtle neurologic dysfunctions resulting from carbon monoxide poisoning.

Anxiety levels were measured before and after ultrasound examination in 183 women who underwent the procedure as part of their routine prenatal care. Women were classified according to their preferred mode of information gathering, their amount of available cognitive resources and predetermined feedback conditions. The results indicated significant reductions in state or situational anxiety levels for all subjects while trait anxiety was unaffected. In addition, the results suggested a correspondence between learned resourcefulness and informational coping styles. Women who had higher levels of cognitive resources and actively sought out information showed significantly greater decreases in state anxiety levels. This finding was also true for women who had lower levels of cognitive resources and tended to block out information. The impact of the scan was more profoundly affected by personality repertoires and informational coping styles than by either of the feedback conditions.

This study showed that "routine" ultrasound scan may have significant psychological effects on parental attitudes toward each other and the fetus.

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