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ERIC Number: EJ869866
Record Type: Journal
Publication Date: 2009-Oct
Pages: 10
Abstractor: As Provided
Reference Count: 0
ISSN: ISSN-0028-3932
The Role of the Basal Ganglia and Its Cortical Connections in Sequence Learning: Evidence from Implicit and Explicit Sequence Learning in Parkinson's Disease
Wilkinson, Leonora; Khan, Zunera; Jahanshahi, Marjan
Neuropsychologia, v47 n12 p2564-2573 Oct 2009
Implicit (unconscious/incidental) and explicit (conscious/intentional) learning are considered to have distinct neural substrates. It is proposed that implicit learning is mediated by the basal ganglia (BG), while explicit learning has been linked to the medial temporal lobes (MTL). To test such a dissociation we investigated implicit and explicit sequence learning in Parkinson's disease (PD), a disorder characterized by striatal dysfunction. We studied both implicit and explicit learning of a 12-item sequence of target locations in 13 PD patients and 15 age-matched controls. In the implicit sequence learning task all participants completed 10 blocks of a probabilistic serial reaction time (SRT) task in which they were exposed to the sequence without explicit knowledge of it. Participants also completed between 1 and 10 blocks of an explicit sequence learning task in which the sequence was learned deliberately by trial-and-error. Both implicit and explicit sequence learning were significantly impaired in PD patients compared to controls. The results indicate that, in addition to playing a role in implicit sequence learning, the BG and its frontal projections are also involved in explicit sequence learning. (Contains 6 figures and 1 table.)
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Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A