Support for distinct subcomponents of spatial working memory: A double dissociation between spatial–simultaneous and spatial–sequential performance in unilateral neglect

Wansard, Murielle; Bastin, Christine; Segovia, F.; Gillet, Sophie; Duret, Christophe; Meulemans, Thierry

doi:10.1080/02643294.2014.995075

Cited by 22 publications

(15 citation statements)

References 65 publications

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“…Therefore, a general impairment of keeping track of the spatial codes associated with ordinal information, irrespective of whether they are represented in the neglected or intact space, could explain why we observed a non-lateralized deficit of serial order in our patients. Finally, Wansard et al (2015) observed that simultaneous and sequential aspects of spatial working memory can be selectively impaired in patients with neglect. Because many similarities exist when memorizing the serial order of verbal and visuo-spatial information in working memory (for a review, see Hurlstone, Hitch, & Baddeley, 2014), it would therefore be interesting to investigate whether impairments of serial order in patients with neglect are systematically observed in both verbal and visuospatial working memory.…”

Section: Discussionmentioning

confidence: 98%

“…Finally, Wansard et al . () observed that simultaneous and sequential aspects of spatial working memory can be selectively impaired in patients with neglect. Because many similarities exist when memorizing the serial order of verbal and visuo‐spatial information in working memory (for a review, see Hurlstone, Hitch, & Baddeley, ), it would therefore be interesting to investigate whether impairments of serial order in patients with neglect are systematically observed in both verbal and visuo‐spatial working memory.…”

Section: Discussionmentioning

confidence: 99%

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Hemispatial neglect and serial order in verbal working memory

Antoine¹,

Ranzini²,

Dijck

et al. 2018

Journal of Neuropsychology

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Working memory refers to our ability to actively maintain and process a limited amount of information during a brief period of time. Often, not only the information itself but also its serial order is crucial for good task performance. It was recently proposed that serial order is grounded in spatial cognition. Here, we compared performance of a group of right hemisphere-damaged patients with hemispatial neglect to healthy controls in verbal working memory tasks. Participants memorized sequences of consonants at span level and had to judge whether a target consonant belonged to the memorized sequence (item task) or whether a pair of consonants were presented in the same order as in the memorized sequence (order task). In line with this idea that serial order is grounded in spatial cognition, we found that neglect patients made significantly more errors in the order task than in the item task compared to healthy controls. Furthermore, this deficit seemed functionally related to neglect severity and was more frequently observed following right posterior brain damage. Interestingly, this specific impairment for serial order in verbal working memory was not lateralized. We advance the hypotheses of a potential contribution to the deficit of serial order in neglect patients of either or both (1) reduced spatial working memory capacity that enables to keep track of the spatial codes that provide memorized items with a positional context, (2) a spatial compression of these codes in the intact representational space.

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Section: Discussionmentioning

confidence: 98%

Section: Discussionmentioning

confidence: 99%

Hemispatial neglect and serial order in verbal working memory

Antoine¹,

Ranzini²,

Dijck

et al. 2018

Journal of Neuropsychology

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“…The effects of sequential or simultaneous presentation of stimuli on performance have been recently described in children with a nonverbal (visuospatial) learning disability (NLD) and in patients with unilateral neglect (Mammarella et al, 2009;Wansard et al, 2015), showing a dissociation according to sequential and simultaneous presentation modality. Specifically, whereas patients affected by unilateral neglect performed worse when the stimuli were presented sequentially than when they were presented simultaneously, children with NLD showed the opposite behavior (Mammarella et al, 2009;Wansard et al, 2015).…”

Section: Discussionmentioning

confidence: 99%

“…C. Mammarella et al, 2006;N. Mammarella, Cornoldi, & Donadello, 2003;Piccardi et al, 2011;Wansard et al, 2015).…”

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New protocol for dissociating visuospatial working memory ability in reaching space and in navigational space

et al. 2018

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Several studies have demonstrated that the processing of visuospatial memory for locations in reaching space and in navigational space is supported by independent systems, and that the coding of visuospatial information depends on the modality of the presentation (i.e., sequential or simultaneous). However, these lines of evidence and the most common neuropsychological tests used by clinicians to investigate visuospatial memory have several limitations (e.g., they are unable to analyze all the subcomponents of this function and are not directly comparable). Therefore, we developed a new battery of tests that is able to investigate these subcomponents. We recruited 71 healthy subjects who underwent sequential and simultaneous navigational tests by using an innovative sensorized platform, as well as comparable paper tests to evaluate the same components in reaching space (Exp. 1). Consistent with the literature, the principal-component method of analysis used in this study demonstrated the presence of distinct memory for sequences in different portions of space, but no distinction was found for simultaneous presentation, suggesting that different modalities of eye gaze exploration are used when subjects have to perform different types of tasks. For this purpose, an infrared Tobii Eye-Tracking X50 system was used in both spatial conditions (Exp. 2), showing that a clear effect of the presentation modality was due to the specific strategy used by subjects to explore the stimuli in space. Given these findings, the neuropsychological battery established in the present study allows us to show basic differences in the normal coding of stimuli, which can explain the specific visuospatial deficits found in various neurological conditions.

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“…Several arguments in relation to simultaneous and sequential processes in visuospatial working memory have arisen: simultaneous and sequential processes might be regarded as indicators of visual and spatial working memory, respectively (Oosterman, Morel, Meijer, Buvens, Kessels, & Postma, 2011); alternatively, simultaneous and sequential processes might be distinguished in spatial working memory (Pazzaglia & Cornoldi, 1999). Nevertheless, a range of experimental (Della Sala, Gray, Baddeley, Allamano, & Wilson, 1999;Frick, 1985), developmental (Hamilton, Coates, & He ernan, 2003;Logie & Pearson, 1997), and decit studies (Mammarella, Cornoldi, Pazzaglia, Toso, Grimoldi, & Vio, 2006;Wansard, Bartolomeo, Bastin, Segovia, Gillet, Duret, & Meulemans, 2015) have found evidence for the distinction between simultaneous and sequential processes in visuospatial working memory.…”

Section: Introductionmentioning

confidence: 99%

Visuospatial Working Memory in Individuals with Intellectual Disabilities under Simultaneous and Sequential Presentation

Okuzumi

Kokubun

2018

JSER

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Visuospatial working memory in individuals with non-speci c intellectual disabilities (NSID) was investigated under di erent modes of presentation. Individuals with NSID and mental-age-matched controls were asked to remember locations presented either simultaneously or sequentially. Results showed that individuals with NSID outperformed mental-age-matched controls in the simultaneous task. eir performance in the sequential task was comparable. Furthermore, the advantage of simultaneous over sequential presentation was greater in individuals with NSID than in the mental-age-matched controls. On the whole, the results suggest that visuospatial working memory in individuals with NSID is preserved. Furthermore, simultaneous and sequential processes in visuospatial working memory are not developed homogeneously. Further evidence for visuospatial working memory in individuals with NSID and the bene ts of distinguishing between simultaneous and sequential processes in visuospatial working memory was revealed.

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Support for distinct subcomponents of spatial working memory: A double dissociation between spatial–simultaneous and spatial–sequential performance in unilateral neglect

Cited by 22 publications

References 65 publications

Hemispatial neglect and serial order in verbal working memory

Hemispatial neglect and serial order in verbal working memory

New protocol for dissociating visuospatial working memory ability in reaching space and in navigational space

Visuospatial Working Memory in Individuals with Intellectual Disabilities under Simultaneous and Sequential Presentation

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