Ameet R Upadhyaya

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The pituitary gland plays a central role in sexual development and brain function. Therefore, we examined the effect of age and gender on pituitary volume in a large sample of healthy children and adults. Volumetric magnetic resonance imaging (MRI) was conducted in one hundred and fifty four (77 males and 77 females) healthy participants. Males were between(More)
Abnormalities in the hypothalamic-pituitary-adrenal axis (HPA) have been implicated in psychosis. To our knowledge, no prior study has measured pituitary volume in a neuroleptic-naïve schizophrenic population. Herein, we present data exploring the volumetric differences in a sample of antipsychotic-naïve patients with a DSM-IV diagnosis of schizophrenia(More)
The objective of this study was to examine the effect of antipsychotics on pituitary volume in schizophrenic subjects. Pituitary volumes were measured in 16 patients with schizophrenia at baseline and 12 months after treatment with an antipsychotic medication using magnetic resonance imaging (MRI). A group of 12 healthy controls was evaluated at baseline(More)
Caudate nuclei are smaller in drug-naive people with schizophrenia but larger in antipsychotic-treated patients. In this magnetic resonance imaging study we found volume reduction of right and left caudate by 8.9 and 8.1% respectively in 50 offspring without psychosis of patients with schizophrenia compared with 53 age- and gender-matched controls,(More)
Encephalopathy is an uncommon complication of childhood influenza infection, typically recognized during influenza epidemics. Imaging hallmarks include characteristic thalamic lesions, thalamic necrosis and hemispheric edema. We describe a child with acute influenza A associated necrotizing encephalopathy with MR angiographic evidence of significant(More)
BACKGROUND AND PURPOSE Influenza A infection can precipitate encephalopathy, encephalitis, or Reye syndrome with the development of cerebral edema in children and is associated with an increased incidence of stroke in adults. The mechanism of these events is poorly understood. Posterior reversible encephalopathy syndrome (PRES) is seen in association with(More)
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