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BMC Neurology
Published in: BMC Neurology 1/2013

Open Access 01-12-2013 | Research article

Cognition is only minimally impaired in Spinocerebellar ataxia type 14 (SCA14): a neuropsychological study of ten Norwegian subjects compared to intrafamilial controls and population norm

Authors: Iselin Marie Wedding, Jeanette Koht, Espen Dietrichs, Nils Inge Landrø, Chantal ME Tallaksen

Published in: BMC Neurology | Issue 1/2013

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Abstract

Background

There is an increasing awareness of the role of the cerebellum not only in motor, but also in cognitive and emotional functions. Spinocerebellar ataxia type 14 (SCA14) is an autosomal dominant hereditary ataxia characterized by a relatively pure cerebellar phenotype. Cognitive impairment has been reported in studies with phenotype descriptions of SCA14, but previous studies have been small without control groups, and no homogeneous and systematic test panel has been used. The objective of this study was to thoroughly characterize the neuropsychological profile in ten Norwegian SCA14 subjects compared to unaffected family members and population norm data.

Methods

Ten SCA14 subjects and ten intrafamilial unaffected age- and education-matched controls from two Norwegian families were included. The unaffected intrafamilial controls included six first degree relatives, two second degree relatives, and two spouses. General intellectual ability, memory, visuoperceptive skills, psychomotor speed, executive functions, depression and anxiety were examined using internationally standardized tests, with minimal need for manual response to avoid motor bias.

Results

No significant cognitive deficit was found in SCA14 subjects compared to intrafamilial controls. Verbal IQ, verbal executive function and psychomotor speed tended to be reduced in affected subjects, but previously reported non-verbal executive dysfunction was not confirmed in this study.

Conclusion

Only subtle cognitive impairment was found in SCA14 affected subjects. The current findings do not confirm earlier reports of cognitive dysfunction in SCA14, but does shows a mild impairment in specific verbal executive functions. Genotypic differences may partly account for this discrepancy, and further studies on larger materials are needed to verify the findings.
Appendix
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Metadata
Title
Cognition is only minimally impaired in Spinocerebellar ataxia type 14 (SCA14): a neuropsychological study of ten Norwegian subjects compared to intrafamilial controls and population norm
Authors
Iselin Marie Wedding
Jeanette Koht
Espen Dietrichs
Nils Inge Landrø
Chantal ME Tallaksen
Publication date
01-12-2013
Publisher
BioMed Central
Published in
BMC Neurology / Issue 1/2013
Electronic ISSN: 1471-2377
DOI
https://doi.org/10.1186/1471-2377-13-186

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