Parietal Lobe Ependymal Tumor

Neuroimaging studies have indicated involvement of left prefrontal cortex and temporal areas in verbal memory processes. The current study used event-related functional neuroimaging to compare encoding of subsequently recalled and not recalled words in high and low memory performers. Fifteen healthy volunteers were given lists of words to learn with immediate recall and to read as a control condition. High performers reported to have visualized the words whereas low performers used a rehearsal strategy. Compared to reading, unsuccessful encoding was associated with thalamic and left premotor area (BA 6) activity. Comparing successful with unsuccessful learning yielded widespread activity of the left prefrontal and posterior temporal gyrus as well as the left superior parietal lobe in the whole group. Low performers showed activation of the left premotor area throughout learning and additionally of the left middle temporal and parahippocampal gyrus during successful encoding. High performers showed increased activation in the extrastriate cortex throughout learning and additionally in the left parietal post- and paracentral areas as well as in the right precuneus during successful encoding. The results suggest that high verbal memory performance is the result of spatiovisual activation concomitant to imagery and low performance of hippocampal and motor activation, the latter being associated with rehearsal, with a common memory circuit subserving both groups.

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Nonketotic Hyperglycemic Chorea in a 10-Year-Old Asian Boy with Diabetes Mellitus

Journal of Pediatric Neurology ◽

10.1055/s-0040-1718553 ◽

2020 ◽

Author(s):

Julia Marian ◽

Firdous Rizvi ◽

Lily Q. Lew

Keyword(s):

Diabetes Mellitus ◽

Parietal Lobe ◽

Rare Complication ◽

Brain Magnetic Resonance Imaging ◽

Food Allergies ◽

Developmental Venous Anomaly ◽

Venous Anomaly ◽

Resonance Imaging ◽

Focal Lesions

AbstractNonketotic hyperglycemic chorea-ballism (NKHCB), also known as diabetic striato-pathy (DS) by some, is a rare complication of diabetes mellitus and uncommon in children. We report a case of a 10 11/12-year-old boy of Asian descent with uncontrolled type 1 diabetes mellitus (T1DM), Hashimoto's thyroiditis, and multiple food allergies presenting with bilateral chorea-ballism. His brain magnetic resonance imaging revealed developmental venous anomaly in right parietal lobe and right cerebellum, no focal lesions or abnormal enhancements. Choreiform movements resolved with correction of hyperglycemia. Children and adolescents with a movement disorder should be evaluated for diabetes mellitus, especially with increasing prevalence and insidious nature of T2DM associated with obesity.

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