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C P Parker

Publications and source records attributed to C P Parker.

5 recordsLinked to original sources
PubMed1997

Support for affirmative action, justice perceptions, and work attitudes: a study of gender and racial-ethnic group differences.

Do gender and race-ethnicity moderate people's reactions to perceptions that their organization supports affirmative action/equal opportunity (AA/EO)? This study compared relationships between perceptions of support for AA/EO, distributive and procedural justice, career development opportunities, and work attitudes in 4 groups of federal employees: White men (n = 4,919), White women (n = 1,622), Blacks/Hispanics (n = 492), and Asians (n = 195). Surprisingly, White men did not associate support for AA/EO with a loss in career development opportunities, organizational injustice, or negative work attitudes. For women and racial-ethnic minorities, support for AA/EO was positively linked to perceptions of organizational justice and increased career development opportunities. As predicted, Blacks/Hispanics had more positive reactions than other employee groups. We conclude that support for AA/EO is generally viewed as fair and has positive attitudinal consequences.

Adult↗
PubMed1992

Contrast-enhanced MR imaging performed after successful lumbar disk surgery: prospective study.

A prospective study was undertaken to establish the normal spectrum and timing of gadolinium-enhanced magnetic resonance (MR) imaging findings in 15 patients who had resolution of symptoms after successful lumbar disk surgery. Enhancement of the facet joints (in 88% of disk levels) and paraspinal muscles (100%) decreased gradually after surgery. Enhancement of the decompressed nerve root tracked proximally toward the conus medullaris in 62% at 3 weeks and was absent in all by 6 months postoperatively. Areas of intermediate signal intensity with peripheral enhancement and mass effect were seen on T1-weighted images at the site of the original disk herniation in 38% at 3 weeks and 12% at 3 months, despite complete relief of leg pain. These results reveal that even in successfully treated (asymptomatic) patients, residual mass effect on the neural elements may frequently simulate a recurrent or residual disk fragment. There is an orderly progression of imaging changes during the first 6 months after lumbar surgery that limits the interpretation of MR examinations during that period.

Adult↗
PubMed1987

Concealment of neonatal cerebral infarction on MRI by normal brain water.

Magnetic resonance imaging (MRI) is highly sensitive in detecting cerebral infarction in adults, both in the acute and chronic stages. Cytotoxic and vasogenic edema produce an increase in the water content of acutely ischemic brain, resulting in good tissue contrast from adjacent normal brain on spin density, T1 and T2 weighted MR images. Gliosis and other chronic brain changes are well seen in later stages. We recently encountered a case of remote cerebral infarction in an infant, however, which was not evident on the initial MR examination at 7 weeks of age but which was clearly seen on a follow-up scan at 9 1/2 months. Our contention is that the infarct was masked by the known increased water content of the neonatal brain, which results in lengthened spin density and relaxation times; edema and gliosis may thus be obscured. This age-related concealment of ischemic brain changes on MR has not to our knowledge been reported, and we present this case as a caveat in the detection of cerebral infarction in neonates.

Body Water↗