Neural correlates of cued recall with and without retrieval of source memory.
Journal - Neuroreport (ENGLAND )
A source memory procedure was used to investigate whether event-related potentials (ERPs) reflect the retrieval of episodic information (recollection) on tests of word-stem cued recall. 'Cued recall ERP effects' for recalled items were found to differ only in their magnitudes, and not their scalp distributions, according to the accuracy of source memory. This finding strongly supports the hypothesis that cued recall ERP effects reflect quantitative variation in the amount or quality of information which can be retrieved about recently experienced events. Topographic analyses also revealed that the distribution of the cued recall ERP effects changed over time, reflecting the activity of at least two temporally and neuroanatomically dissociable neural populations contributing to recollection on this task.
|ISSN : ||0959-4965|
|Mesh Heading : ||Adolescent Adult Cerebral Cortex Evoked Potentials Female Humans Male Mental Recall Neurons physiology physiology|
|Mesh Heading Relevant : ||Brain Mapping physiology physiology|
Electrophysiological evidence for dissociable processes contributing to recollection.
Journal - Acta psychologica (NETHERLANDS )
This paper reviews a number of studies in which we have employed event-related potentials (ERPs) to investigate the cognitive processes which contribute to conscious recollection. Across a range of tasks (including recognition memory, source memory, associative recall and word-stem cued recall) there is evidence for the proposal that recollection involves processes which are both functionally and neurologically dissociable. This evidence takes the form of temporally and topographically dissociable ERP effects, which attain their maximum amplitude when elicited by items that satisfy operational definitions for having been recollected. The ERP effects are interpreted as reflecting retrieval and post-retrieval processes which, we argue, constitute two separate components of recollection as defined within the process dissociation framework of Jacoby and colleagues. The ERP findings suggest that post-retrieval processing is particularly sensitive to task variables, implying that recollection may be neither functionally nor neurologically homogeneous.
|ISSN : ||0001-6918|
|Mesh Heading : ||Association Learning Cognition Cues Humans Memory Mental Recall physiology|
|Mesh Heading Relevant : ||Evoked Potentials physiology physiology|
An event-related potential study of word-stem cued recall.
Journal - Brain research. Cognitive brain research (NETHERLANDS )
Event-related potentials (ERPs) were recorded from 13 scalp sites while subjects attempted to recall studied words using word-stems. If recall failed, stems were to be completed with the first suitable word to come to mind. To distinguish between correct completions accompanied and unaccompanied by explicit memory, subjects were required to make an overt recognition ("old/new") judgement for each completion. Semantically studied words were associated with higher levels of recall and recognition than were words subjected to non-semantic study. The sole ERP effect was a sustained positive shift in ERPs evoked by stems attracting correct completions that were correctly judged to be old. The shift was anteriorly distributed, and onset was around 300 ms post stimulus. It is interpreted as a reflection of processes either contributing to, or contingent upon, explicit memory retrieval.
|ISSN : ||0926-6410|
|Mesh Heading : ||Adolescent Adult Cues Evoked Potentials Female Humans Male Memory Mental Recall Semantics|
|Mesh Heading Relevant : ||physiology physiology physiology|
An event-related potential study of explicit memory on tests of cued recall and recognition.
Journal - Neuropsychologia (ENGLAND )
The event-related potential (ERP) correlates of performance on test of word-stem cued recall and recognition memory were contrasted. ERPs elicited by stems attracting successful recall exhibited a sustained positive-going shift relative to ERPs elicited by stems completed with unstudied items. This positive shift was maximal at electrode sites on and adjacent to the midline. An equally sustained positive-going ERP modulation was observed for the recognition memory task in ERPs elicited by recognised 'old' items relative to ERPs elicited by correctly rejected 'new' items. The scalp topography of this effect shifted from a parietally distributed asymmetry favouring left hemisphere sites, to a frontally distributed effect maximal over midline and right hemisphere sites. The findings indicate that ERP correlates of explicit memory are task-dependent. The disparate ERP effects are interpreted as reflecting a common explicit retrieval mechanism which is sensitive to the nature of retrieval cues provided at test.
|ISSN : ||0028-3932|
|Mesh Heading : ||Adult Cognition Evoked Potentials Humans Memory Mental Recall physiology physiology|
|Mesh Heading Relevant : ||Cues Ovum physiology physiology|