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Abstract: Because most successful interventions for Alzheimer''s disease (AD) rely upon early diagnosis and implementation, it is important to understand the factors influencing dementia treatment-seeking behaviors. These include perceptions, beliefs, values, and feelings relating to AD, which may vary among and within ethnic groups according to the strength of culturally-based explanatory models and individual group members'' ages and experiences. This study used ten focus groups drawn from Asian American communities representing different national origins (Chinese, Japanese, and Korean) to examine the factors shaping attitudes toward AD in general, and treatment-seeking in particular, that may constitute barriers to timely diagnosis and treatment of AD among Asian Americans of various ages and cultural backgrounds. The results suggest that, while these communities share a keen awareness of AD, beliefs regarding the disorder may be influenced at least as strongly by folk wisdom and culturally acceptable partial truths as by scientific information. [Copyright &y& Elsevier]

Little is known about the epilepsy that often occurs in the juvenile form of Huntington's disease (HD), but is absent from the adult-onset form. The primary aim of this study was to characterize the seizures in juvenile HD (JHD) subjects with regard to frequency, semiology, defining EEG characteristics, and response to antiepileptic agents. A multicenter, retrospective cohort was identified by database query and/or chart review. Data on age of HD onset, primary HD manifestations, number of CAG repeats, the presence or absence of seizures, seizure type(s), antiepileptic drugs used, subjects' response to antiepileptic drugs (AEDs), and EEG results were assembled, where available. Ninety subjects with genetically confirmed JHD were included. Seizures were present in 38% of subjects and were more likely to occur with younger ages of HD onset. Generalized tonic-clonic seizures were the most common seizure type, followed by tonic, myoclonic, and staring spells. Multiple seizure types commonly occurred within the same individual. Data on EEG findings and AED usage are presented. Seizure risk in JHD increases with younger age of HD onset. Our ability to draw firm conclusions about defining EEG characteristics and response to AEDs was limited by the retrospective nature of the study. Future prospective studies are required. © 2012 Movement Disorder Society [ABSTRACT FROM AUTHOR]

Huntington disease (HD) is caused by the expansion of a CAG repeat within the coding region of a novel gene on 4p16.3. Although the variation in age at onset is partly explained by the size of the expanded repeat, the unexplained variation in age at onset is strongly heritable (h² = 0.56), which suggests that other genes modify the age at onset of HD. To identify these modifier loci, we performed a 10-cM density genomewide scan in 629 affected sibling pairs (295 pedigrees and 695 individuals), using ages at onset adjusted for the expanded and normal CAG repeat sizes. Because all those studied were HD affected, estimates of allele sharing identical by descent at and around the HD locus were adjusted by a positionally weighted method to correct for the increased allele sharing at 4p. Suggestive evidence for linkage was found at 4p16 (LOD = 1.93), 6p21­23 (LOD = 2.29), and 6q24­26 LOD = 2.28), which may be useful for investigation of genes that modify age at onset of HD. [ABSTRACT FROM AUTHOR]