Auditory Verbal Learning and Memory in Cases of Callosal Agenesis

Geffen, Gina; Forrester, Glenys; Jones, Dean; Simpson, Donald

doi:10.1007/978-1-4613-0487-6_25

Cited by 7 publications

(17 citation statements)

References 18 publications

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“…These results for initial learning (i.e., level of total recall over the first five trials) are consistent with some of the findings from word-list learning in a study of four individuals with AgCC (Geffen et al, 1994). Specifically, Geffen et al found that the two child participants had clear impairment (i.e., greater than 1 SD below the normative group) in their overall level of recall over Trials 1–5.…”

Section: Discussionsupporting

confidence: 88%

“…In contrast to these findings, Geffen et al (1994) reported a primary retrieval problem (i.e., poor delayed recall as compared to recognition performance) using the RAVLT in three individuals with complete AgCC. Geffen’s participants performed within normal limits (i.e., within 1 SD of average) on cued recall, but had lower performance (i.e., greater than 1 SD below average) on free recall after a delay.…”

Section: Discussioncontrasting

confidence: 57%

“…Several studies found that individuals with isolated AgCC have recall impairments on tests of verbal learning and recall of word lists (Fischer, Ryan, & Dobyns, 1992; Geffen, Forrester, Jones, & Simpson, 1994; Panos, Porter, Panos, Gaines, & Erdberg, 2001). First, Fischer et al (1992) administered a selective reminding paradigm test to two children with AgCC (both age 8) with normal-range IQ.…”

Section: Introductionmentioning

confidence: 99%

“…One individual performed in the 5th percentile and the other in the 16th on long-term retrieval of verbal information. In another study, the Rey Auditory Verbal Learning Test (RAVLT; Rey, 1958) was administered to four individuals with AgCC and FSIQ>80, (Geffen et al, 1994). Three participants (ages 10, 14, and 37) had complete AgCC and one participant (age 22) had partial AgCC.…”

Section: Introductionmentioning

confidence: 99%

“…This pattern of performance suggests that they encoded and retained the verbal information, but had difficulty retrieving it from memory without the help of external cues. The author hypothesized that since recall deficits were not evident in the individual with partial AgCC, the remaining portion of the corpus callosum must play a role in the proper consolidation and retrieval of verbal information (Geffen et al, 1994). A later case study of an 11-year-old with partial AgCC and intact FSIQ (Panos et al, 2001) reported impaired recall on the California Verbal Learning Test—Children’s Version (CVLT-C; Delis, Kaplan, Kramer, & Ober, 1994).…”

Section: Introductionmentioning

confidence: 99%

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Verbal learning and memory in agenesis of the corpus callosum

2014

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The role of interhemispheric interactions in the encoding, retention, and retrieval of verbal memory can be clarified by assessing individuals with complete or partial agenesis of the corpus callosum (AgCC), but who have normal intelligence. This study assessed verbal learning and memory in AgCC using the California Verbal Learning Test—Second Edition (CVLT-II). Twenty-six individuals with AgCC were compared to 24 matched controls on CVLT-II measures, as well as Donders’ four CVLT-II factors (i.e., Attention Span, Learning Efficiency, Delayed Memory, and Inaccurate Memory). Individuals with AgCC performed significantly below healthy controls on the Delayed Memory factor, confirmed by significant deficits in short and long delayed free recall and cued recall. They also performed less well in original learning. Deficient performance by individuals with AgCC during learning trials, as well as deficits in all forms of delayed memory, suggest that the corpus callosum facilitates interhemispheric elaboration and encoding of verbal information.

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Section: Discussionsupporting

confidence: 88%

Section: Discussioncontrasting

confidence: 57%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Verbal learning and memory in agenesis of the corpus callosum

2014

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Learning and memory in individuals with agenesis of the corpus callosum

et al. 2016

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Damage to long white matter pathways in the cerebral cortex is known to affect memory capacity. However, the specific contribution of interhemispheric connectivity in memory functioning is only beginning to become understood. The present study examined verbal and visual memory processing in individuals with agenesis of the corpus callosum (AgCC) using the Wechsler Memory Scale-Third Edition (WMS-III; Wechsler, 1997b). Thirty participants with AgCC (FSIQ >78) were compared against 30 healthy age and IQ matched controls on auditory/verbal (Logical Memory, Verbal Paired Associates) and visual (Visual Reproduction, Faces) memory subtests. Performance was worse in AgCC than controls on immediate and delayed verbal recall for rote word pairs and on delayed recall of faces, as well as on percent recall for these tasks. Immediate recall for thematic information from stories was also worse in AgCC, but groups did not differ on memory for details from narratives or on recall for thematic information following a time delay. Groups also did not differ on memory for abstract figures or immediate recall of faces. On all subtests, individuals with AgCC had greater frequency of clinically significant impairments than predicted by the normal distribution. Results suggest less efficient overall verbal and visual learning and memory with relative weaknesses processing verbal pairs and delayed recall for faces. These findings suggest that the corpus callosum facilitates more efficient learning and recall for both verbal and visual information, that individuals with AgCC may benefit from receiving verbal information within semantic context, and that known deficits in facial processing in individuals with AgCC may contribute to their impairments in recall for faces.

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Bimanual coordination in alcohol-exposed children: Role of the corpus callosum

Roebuck-Spencer

Mattson²,

Marion

et al. 2004

J Int Neuropsychol Soc

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The corpus callosum (CC) is one of several brain structures affected in children prenatally exposed to alcohol. This structure plays a major role in coordinating motor activity from opposite sides of the body, and deficits in bimanual coordination have been documented in individuals with agenesis of or damage to the CC, particularly when the task is performed without visual feedback. The Bimanual Coordination Test was used to assess speed and accuracy on a task where both hands must coordinate to guide a cursor through angled pathways providing measures of interhemispheric interaction or the ability of the two hemispheres to coordinate activity via the corpus callosum. Twenty-one children with fetal alcohol spectrum disorders (FASD) and 17 non-exposed control children (CON), matched closely in age, sex, and ethnicity were tested. For trials with visual feedback (WV), children with FASD were slower than CON children but were equally accurate. Although statistically significant group differences were not observed on most trials completed without visual feedback (WOV), accuracy of the FASD group on WOV trials was highly variable. Group differences in accuracy on WOV angles approached significance after accounting for performance on the WV angles, and children with FASD were significantly less accurate on an individual angle believed to be particularly sensitive to interhemispheric interaction. These results indicate that children with FASD are slower than CON children but equally accurate on basic visuomotor tasks. However, as task complexity and reliance on interhemispheric interaction increases, children with FASD demonstrate variable and inaccurate performance.

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Auditory Verbal Learning and Memory in Cases of Callosal Agenesis

Cited by 7 publications

References 18 publications

Verbal learning and memory in agenesis of the corpus callosum

Verbal learning and memory in agenesis of the corpus callosum

Learning and memory in individuals with agenesis of the corpus callosum

Bimanual coordination in alcohol-exposed children: Role of the corpus callosum

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