Linked Life Data

15758155

Source:http://linkedlifedata.com/resource/pubmed/id/15758155

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
10
pubmed:dateCreated
2005-3-10
pubmed:abstractText
Experimental studies on animals have shown that dopamine is a key neurotransmitter in the regulation of working memory (WM) functions in the prefrontal cortex. In humans, blood flow studies show prefrontal involvement in WM functions, but direct evidence for the involvement of the dopaminergic system in WM is lacking. Using positron emission tomography with a recently developed high-affinity dopamine D2 receptor tracer, [11C]FLB 457, we explored frontal, temporal, and parietal D2 receptor availability in 12 healthy volunteers while they were performing verbal WM and sustained attention tasks. During the performance of both tasks, reduced D2 receptor availability was observed in the left ventral anterior cingulate, suggesting an attention or arousal-related increase in dopamine release during these tasks. Compared with the sustained attention task, the verbal WM task reduced D2 receptor availability in the ventrolateral frontal cortex bilaterally and in the left medial temporal structures (amygdala, hippocampus), suggesting that dopamine release in these regions might have a specific role in WM. In addition, correlation analyses indicated that increased dopamine release in the right ventrolateral frontal cortex and the left ventral anterior cingulate during the WM task was associated with faster and more stable WM performance, respectively. Our results indicate that regionally specific components of the frontotemporal dopaminergic network are functionally involved in WM performance in humans.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Mar
pubmed:issn
1529-2401
pubmed:author
pubmed:issnType
Electronic
pubmed:day
9
pubmed:volume
25
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
2471-7
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
2005
pubmed:articleTitle
Frontal and temporal dopamine release during working memory and attention tasks in healthy humans: a positron emission tomography study using the high-affinity dopamine D2 receptor ligand [11C]FLB 457.
pubmed:affiliation
Turku PET Centre, University of Turku, FIN-20014 Turku, Finland.
pubmed:publicationType
Journal Article, Comparative Study, Research Support, Non-U.S. Gov't