Retrograde memory after unilateral stroke

Batchelor, Samantha Jane; Thompson, Elizabeth; Miller, Laurie A.

doi:10.1016/j.cortex.2006.05.003

Cited by 21 publications

(10 citation statements)

References 44 publications

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“…The subiculum which connects the hippocampus to parahippocampal regions has also been shown to be instrumental in learning and memory [9]–[12]. The exact role of the hippocampus in short- and long-term memory function continues to be hotly debated but it is clear that hippocampal lesions can lead to anterograde [13] and retrograde amnesia [14]. Although there are diverging views as to whether some memory traces are stored in the hippocampus there is widespread agreement that the hippocampus is required for the formation, consolidation and/or retrieval of semantic, autobiographical, episodic, implicit and procedural memories [see 15 for a discussion], [16].…”

Section: Introductionmentioning

confidence: 99%

In Vivo Hippocampal Measurement and Memory: A Comparison of Manual Tracing and Automated Segmentation in a Large Community-Based Sample

et al. 2009

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While manual tracing is the method of choice in measuring hippocampal volume, its time intensive nature and proneness to human error make automated methods attractive, especially when applied to large samples. Few studies have systematically compared the performance of the two techniques. In this study, we measured hippocampal volumes in a large (N = 403) population-based sample of individuals aged 44–48 years using manual tracing by a trained researcher and automated procedure using Freesurfer (http://surfer.nmr.mgh.harvard.edu) imaging suite. Results showed that absolute hippocampal volumes assessed with these methods were significantly different, with automated measures using the Freesurfer software suite being significantly larger, by 23% for the left and 29% for the right hippocampus. The correlation between the two methods varied from 0.61 to 0.80, with lower correlations for hippocampi with visible abnormalities. Inspection of 2D and 3D models suggested that this difference was largely due to greater inclusion of boundary voxels by the automated method and variations in subiculum/entorhinal segmentation. The correlation between left and right hippocampal volumes was very similar by the two methods. The relationship of hippocampal volumes to selected sociodemographic and cognitive variables was not affected by the measurement method, with each measure showing an association with memory performance and suggesting that both were equally valid for this purpose. This study supports the use of automated measures, based on Freesurfer in this instance, as being sufficiently reliable and valid particularly in the context of larger sample sizes when the research question does not rely on ‘true’ hippocampal volumes.

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Section: Introductionmentioning

confidence: 99%

In Vivo Hippocampal Measurement and Memory: A Comparison of Manual Tracing and Automated Segmentation in a Large Community-Based Sample

et al. 2009

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“…As one would expect of a valid test of memory, damage to brain structures known to be involved in recall and recognition, such as the temporal lobe, affects performance on the test in predictable ways. For example, damage to the hippocampus resulting from stroke when compared with damage outside that region leads to impairment of recall and recognition on the public events subtest of the ARMB (Batchelor et al., 2008). Likewise, TL results in poorer performance on this subtest compared with that of controls (Lah et al., 2004).…”

Section: Discussionmentioning

confidence: 99%

“…Batchelor, Thompson, and Miller (2008) reported a study of retrograde memory in stroke patients with unilateral lesions involving the frontal or temporal lobe. Autobiographical memory was tested by interview, memory for public events using the public events subtest of the ARMB, and memory for words entering the language at different time points was tested using an adaptation of a North American test developed for this purpose.…”

Section: Group Comparison Studiesmentioning

confidence: 99%

The Australian Remote Memory Battery, 10 Years on

O’Gorman

Shum

2012

Australian Psychologist

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The article reviews research conducted with the Australian Remote Memory Test (ARMB) since its development first reported in 2001. Data from case studies and experimental investigations that have used the ARMB are summarised, and the use made of these data in reviews of the literature is noted. The ARMB has been found sensitive to disease processes such as herpes simplex, stroke, and epilepsy and lesion effects such as temporal lobectomy. The pattern of findings is consistent with current understanding of memory function. The studies have, however, pointed to factors that need to be considered in using the test, including patient medication and education level. Directions for future research with the test are briefly noted.

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“…Similarly, evidence from fMRI, PET imaging, and behavioral testing of adult patients with epilepsy suggests that the left hippocampus is more involved in verbal memory tasks while the right hippocampus is move involved in non-verbal memory tasks 6,10,12-19 . Further, patients with bilateral hippocampal lesions are much more impaired than patients with unilateral hippocampal lesions, such that patients with bilateral lesions have difficulties holding jobs and managing their own affairs while patients with unilateral lesions often learn to function independently using compensatory strategies 9,20 .…”

Section: Introductionmentioning

confidence: 99%

Hippocampal Volume and Memory Performance in Children With Perinatal Stroke

Gold

Trauner

2014

Pediatric Neurology

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Background Pediatric neurologists and neonatologists are often asked to prognosticate about cognitive outcome after perinatal brain injury (including likely memory and learning outcomes); however, relatively little data exists upon which accurate predictions can be made. Further, while the consequences of brain injury on hippocampal volume and memory performance have been studied extensively in adults, little work has been done in children. Methods We measured the volume of the hippocampus in 27 children with perinatal stroke and 19 controls, and measured their performance on standardized verbal and non-verbal memory tests. Results (i) As a group, children with perinatal stroke had smaller left and right hippocampi compared to controls. (ii) Individually, children with perinatal stroke demonstrated one of 3 findings: no hippocampal loss, unilateral hippocampal loss, or bilateral hippocampal volume loss compared to controls. (iii) Hippocampal volume inversely correlated with memory test performance in the perinatal stroke group, with smaller left and right hippocampal volumes related to poorer verbal and non-verbal memory test performance, respectively. (iv) Seizures played a significant role in determining the presence of memory deficit and extent of hippocampal volume reduction in patients with perinatal stroke. Conclusions These findings support the view that, in the developing brain, the left and right hippocampi preferentially support verbal and non-verbal memory respectively, a consistent finding in the adult literature but a subject of debate in the pediatric literature. This is the first work to report that children with focal brain injury incurred from perinatal stroke have volume reduction in the hippocampus and impairments in certain aspects of declarative memory.

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Retrograde memory after unilateral stroke

Cited by 21 publications

References 44 publications

In Vivo Hippocampal Measurement and Memory: A Comparison of Manual Tracing and Automated Segmentation in a Large Community-Based Sample

In Vivo Hippocampal Measurement and Memory: A Comparison of Manual Tracing and Automated Segmentation in a Large Community-Based Sample

The Australian Remote Memory Battery, 10 Years on

Hippocampal Volume and Memory Performance in Children With Perinatal Stroke

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