Neurosarcoidosis presenting as acute infarction on diffusion-weighted MR imaging: summary of radiologic findings.

A 36-year-old woman presented with acute-onset right lower extremity paresthesias, dysarthria, right facial droop, and right hemiparesis. CT and MR imaging of the brain revealed extensive white matter disease and left basal ganglia infarction with dural and leptomeningeal enhancement. Differential considerations included vasculitis, granulomatous disease, and neoplasm. Chest, abdomen, and pelvis CTs were normal. Right temporal lobe biopsy revealed noncaseating granulomatous inflammation consistent with neurosarcoidosis.

Beyond category sorting and pleasantness rating: inducing relational and item-specific processing.

In most studies of relational and item-specific processing, category sorting and pleasantness rating have been the main procedures used to induce these two types of processing. Because the two types of processing have been studied in a wide range of memory phenomena (Hunt & McDaniel, 1993), it is strange that other tasks have not been proposed and tested. The present experiment demonstrates that equivalent results can be obtained with three relational processing tasks (category sorting, narrative construction, and relational imagery) and equivalent results with three item-specific processing tasks (pleasantness ratings, familiarity ratings, and single imagery).

Health care and America's rolling depression.

The driving force behind the restructuring of American health care delivery is the perceived inability of employers to continue to bear the escalating costs of health care. With the failure of governmental reform, restructuring has evolved to the free market in the form of managed care, which is exposing the central cost problem--enormous over-capacity of physicians and hospitals. Policies designed to hasten the end of over-capacity are called for in contrast to many being presently pursued, which are likely to prolong it.

New perspectives on our national health care dilemma.

Continued debate over who should pay for the increasingly unaffordable U.S. health care system has failed to yield a consensus solution. Shifting attention to how to reduce health care costs may be more productive. Strategies for achieving this goal include drastically reducing costly quality deficiencies, eliminating higher cost care options that add no demonstrated value, recognizing that responsibility for clinical and cost consequences cannot be divided, and acknowledging that rationing available resources is superior to other allocation alternatives.

Competing responses and the processing of irrelevant information.

A number of studies have shown that performance of identification and discrimination tasks is detrimentally affected by irrelevant information, yet other studies have failed to find such decrements. It is suggested that these contradictory findings depend on whether S must make difficult discriminations among the relevant stimuli, the irrelevant stimuli, or between the relevant and irrelevant stimuli. The role of irrelevant information in these tasks is to enhance or amplify the competihg responses engendered by the difficult discriminations. Irrelevant information enhances competing responses by increasing the information processing requirements of a task. The results of various studies of irrelevant information seem to be in good agreement with the assertions.