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Probabilistic category learning engages neural circuitry that includes the prefrontal cortex and caudate nucleus, two regions that show prominent changes with normal aging. However, the specific contributions of these brain regions are uncertain, and the effects of normal aging have not been examined previously in probabilistic category learning. In the(More)
Functional neuroimaging studies of probabilistic category learning in healthy adults report activation of cortical-striatal circuitry. Based on previous findings of normal learning rate concurrent with an overall performance deficit in patients with schizophrenia, we hypothesized that relative to healthy adults, patients with schizophrenia would display(More)
This study was undertaken at the Christian Medical College and Hospital, Ludhiana, encompassing all patients of multiple myeloma presenting between January 01, 1982 and December 31, 1991. In all, 89 patients were included. The may Grunwald Giemsa stained bone marrow aspiration slides of each patient was examined under oil- immersion and a morphological(More)
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