Egocentric and allocentric spatial memory in idiopathic cervical dystonia.

Abstract:

OBJECTIVE:To investigate whether impaired spatial memory contributes to cognitive deficits in idiopathic cervical dystonia (ICD). METHODS:The authors tested 16 untreated patients with ICD and 16 healthy controls with four variants of a classic spatial memory task, in which subjects were requested to recall the locations of 16 toy objects either immediately after their presentation or after an unfilled delay of 10 minutes. By varying the spatial relationship between subject and toy object array, we tested encoding and memory of spatial relationships between subject and toy objects (egocentric tasks) and of spatial relationships between toy objects and environment (allocentric tasks). RESULTS:In all four tasks, absolute performance of patients did not differ significantly from controls, suggesting that there are no significant spatial memory deficits in ICD. However, significant correlations between egocentric and allocentric task performance were found in patients but not in controls. CONCLUSIONS:While control subjects flexibly used egocentric or allocentric spatial representations in memory tasks, patients with idiopathic cervical dystonia (ICD) solved both task types with a single allocentric strategy. Our findings point to the existence of compensatory mechanisms between distinct neural systems supporting egocentric and allocentric spatial representations in ICD.

journal_name

Neurology

journal_title

Neurology

authors

Ploner CJ,Stenz U,Fassdorf K,Arnold G

doi

10.1212/01.WNL.0000161869.83783.05

subject

Has Abstract

pub_date

2005-05-24 00:00:00

pages

1733-8

issue

10

eissn

0028-3878

issn

1526-632X

pii

64/10/1733

journal_volume

64

pub_type

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