Motor sequence consolidation: constrained by critical time windows or competing components

Cohen, D. A. and Robertson, E. M. (2007) Motor sequence consolidation: constrained by critical time windows or competing components. Experimental Brain Research, 177(4), pp. 440-446. (doi: 10.1007/s00221-006-0701-6) (PMID:17021894) (PMCID:PMC1805458)

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Skill improvements may develop between practice sessions during memory consolidation. Skill enhancement within an egocentric coordinate frame develops over wake, whereas skill enhancement in an allocentric coordinate frame develops over a night of sleep. We tested whether both types of improvement could develop over two different 24-h intervals: 8 am to 8 am or from 8 pm to 8 pm. We found that for each 24 h interval, only one type of skill improvement was seen. Despite passing through wake and a night of sleep participants only showed skill improvements commensurate with either a night of sleep or a day awake. The nature of the off-line skill enhancement was determined by when consolidation occurred within the normal sleep–wake cycle. We conclude that motor sequence consolidation is constrained either by having critical time windows or by a competitive interaction in which improvements within one co-ordinate frame actively block improvements from developing in the alternative co-ordinate frame.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Robertson, Professor Edwin
Authors: Cohen, D. A., and Robertson, E. M.
College/School:College of Medical Veterinary and Life Sciences > Institute of Neuroscience and Psychology
Journal Name:Experimental Brain Research
ISSN (Online):1432-1106
Published Online:05 October 2007

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