Abstract:
:In humans and many other animals, memory consolidation occurs through multiple temporal phases and usually involves more than one neuroanatomical brain system. Genetic dissection of Pavlovian olfactory learning in Drosophila melanogaster has revealed multiple memory phases, but the predominant view holds that all memory phases occur in mushroom body neurons. Here, we demonstrate an acute requirement for NMDA receptors (NMDARs) outside of the mushroom body during long-term memory (LTM) consolidation. Targeted dsRNA-mediated silencing of Nmdar1 and Nmdar2 (also known as dNR1 or dNR2, respectively) in cholinergic R4m-subtype large-field neurons of the ellipsoid body specifically disrupted LTM consolidation, but not retrieval. Similar silencing of functional NMDARs in the mushroom body disrupted an earlier memory phase, leaving LTM intact. Our results clearly establish an anatomical site outside of the mushroom body involved with LTM consolidation, thus revealing both a distributed brain system subserving olfactory memory formation and the existence of a system-level memory consolidation in Drosophila.
journal_name
Nat Neuroscijournal_title
Nature neuroscienceauthors
Wu CL,Xia S,Fu TF,Wang H,Chen YH,Leong D,Chiang AS,Tully Tdoi
10.1038/nn2005subject
Has Abstractpub_date
2007-12-01 00:00:00pages
1578-86issue
12eissn
1097-6256issn
1546-1726pii
nn2005journal_volume
10pub_type
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