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Encoding and the frontal lobes: a dissociation between retrograde and anterograde memories

Ward, J; (2003) Encoding and the frontal lobes: a dissociation between retrograde and anterograde memories. Cortex , 39 (4-5) pp.791 - 812.

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Abstract

Recent functional neuroimaging studies have suggested that different neural substrateswithin the frontal lobes are associated with memory encoding, retrieval and monitoring. Ifthis is the case, then it should be possible to find frontal patients with selective deficits tothese processes. However, most laboratory based memory tests (e.g. Wechsler MemoryScale) require a combination of all these processes making it hard to find clear dissociationsbetween patients. Using tests of everyday memory, this study documents a clear dissociationbetween a frontal patient’s (JB) impaired ability to retrieve events from the anterogradeperiod relative to spared ability to retrieve events from the retrograde period. This isconsistent with specific disruption to frontal mechanisms associated with encoding whichdisrupts the formation of new episodic memories. The defective mechanism may be relatedto more general aspects of cognitive processing (e.g. selection demands), but it is unlikelyto reflect damage to working memory (as assessed by the n-back task) as there is a cleardissociation between spared performance on this task and impaired performance on acomparable episodic recognition memory task.

Type:Article
Title:Encoding and the frontal lobes: a dissociation between retrograde and anterograde memories
Additional information:Imported via OAI, 15:41:43 19th Jul 2007
UCL classification:UCL > School of Life and Medical Sciences > Faculty of Brain Sciences > Psychology and Language Sciences (Division of) > Institute of Cognitive Neuroscience
UCL > School of Life and Medical Sciences > Faculty of Life Sciences

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