References of "Majerus, Steve"
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See detailNaming actions and objects in bilingual aphasia : a multiple case study
Poncelet, Martine ULg; Majerus, Steve ULg; Raman, Ilhan et al

in Brain & Language (2007), 103

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See detailWorking memory dysfunctions in stroke patients
Van der Linden, Martial ULg; Poncelet, Martine ULg; Majerus, Steve ULg

in Godefroy, Olivier; Bogousslavsky, Julien (Eds.) The behavioural and cognitive neurology of stroke (2007)

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See detailExploring the relationship between new word learning and short-term memory for serial order recall, item recall, and item recognition
Majerus, Steve ULg; Poncelet, Martine ULg; Elsen, B. et al

in European Journal of Cognitive Psychology (2006), 18(6), 848-873

We reexplored the relationship between new word learning and verbal short-term memory (STM) capacities, by distinguishing STM for serial order information, item recall, and item recognition. STM ... [more ▼]

We reexplored the relationship between new word learning and verbal short-term memory (STM) capacities, by distinguishing STM for serial order information, item recall, and item recognition. STM capacities for order information were estimated via a serial order reconstruction task. A rhyme probe recognition task assessed STM for item recognition. Item recall capacities were derived from the proportion of item errors in an immediate serial recall task. In Experiment 1, strong correlations were observed between item recall and item recognition, but not between the item STM tasks and the serial order task, supporting recent theoretical positions that consider that STM for item and serial order rely on distinct capacities. Experiment 2 showed that only the serial order reconstruction task predicted independent variance in a paired associate word - nonword learning task. Our results suggest that STM capacities for serial order play a specific and causal role in learning new phonological information. [less ▲]

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See detailA multiple case study of verbal short-term memory in velo-cardio-facial syndrome
Majerus, Steve ULg; Glaser, B.; Van der Linden, Martial ULg et al

in Journal of Intellectual Disability Research (2006), 50(Pt 6), 457-469

Background: Velo-cardio-facial syndrome (VCFS, 22q11.2 deletion) is characterized by severely delayed language development. The current study explored the integrity of verbal short-term memory (STM), a ... [more ▼]

Background: Velo-cardio-facial syndrome (VCFS, 22q11.2 deletion) is characterized by severely delayed language development. The current study explored the integrity of verbal short-term memory (STM), a cognitive function critically involved in language development, in eight children with VCFS. Methods: Using a multiple case study design, we presented a series of STM tasks exploring immediate serial recall for word and non-word lists to eight children with VCFS (aged 8 - 12 years) and to chronological-age-matched control groups. A first task assessed the integrity of phonological coding in verbal STM by comparing recall for phonologically similar and dissimilar words. Subsequently, the interaction between verbal knowledge and STM capacity was investigated by comparing recall for high- and low-imageability words, for high- and low-frequency words, and for words and non-words. A final task assessed short-term serial order recognition for digit sequences. Results: When computing the number of items recalled in the word recall tasks, independently of their serial position, only one child presented consistent difficulties. Short-term recall of non-words was normal in each child. Phonological similarity and verbal knowledge influenced STM performance to a similar extent in children with VCFS and controls. On the other hand, when applying a strict serial recall criterion, difficulties with the word and non-word recall tasks were observed in most children. Half of the patients were also impaired in the serial order recognition task. Conclusions: Despite mild intellectual disability, it is possible for short-term retention capacities for verbal item information to be at an age-appropriate level in VCFS. However, STM for serial order information could be impaired more specifically. [less ▲]

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See detailRelations between vocabulary development and verbal short-term memory: The relative importance of short-term memory for serial order and item information
Majerus, Steve ULg; Poncelet, Martine ULg; Greffe, C. et al

in Journal of Experimental Child Psychology (2006), 93(2), 95-119

Although many studies have shown an association between verbal short-term memory (STM) and vocabulary development, the precise nature of this association is not yet clear. The current study reexamined ... [more ▼]

Although many studies have shown an association between verbal short-term memory (STM) and vocabulary development, the precise nature of this association is not yet clear. The current study reexamined this relation in 4- to 6-year-olds by designing verbal STM tasks that maximized memory for either item or serial order information. Although empirical data suggest that distinct STM processes determine item and serial order recall, these were generally confounded in previous developmental studies. We observed that item and order memory tasks were independently related to vocabulary development. Furthermore, vocabulary development was more strongly associated with STM for order information in 4- and 6-year-olds and with STM for item information in 5-year-olds. These data highlight the specificity of verbal STM for serial order and item information and suggest a causal association between order STM processes and vocabulary development, at least in 4- and 6-year-olds. (c) 2005 Elsevier Inc. All rights reserved. [less ▲]

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See detailThe left intraparietal sulcus and verbal short-term memory: Focus of attention or serial order ?
Majerus, Steve ULg; Poncelet, Martine ULg; Van der Linden, Martial ULg et al

in Neuroimage (2006), 32(2), 880-891

One of the most consistently activated regions during verbal short-term memory (STM) tasks is the left intraparietal sulcus (IPS). However, its precise role remains a matter of debate. While some authors ... [more ▼]

One of the most consistently activated regions during verbal short-term memory (STM) tasks is the left intraparietal sulcus (IPS). However, its precise role remains a matter of debate. While some authors consider the IPS to be a specific store for serial order information, other data suggest that it serves a more general function of attentional focalization. In the current fMRI experiment, we investigated these two hypotheses by presenting different verbal STM conditions that probed recognition for word identity or word order and by assessing functional connectivity of the left IPS with distant brain areas. If the IPS has a role of attentional focalization, then it should be involved in both order and item conditions, but it should be connected to different brain regions, depending on the neural substrates involved in processing the different types of information (order versus phonological/orthographic) to be remembered in the item and order STM conditions. We observed that the left IPS was activated in both order and item STM conditions but for different reasons: during order STM, the left IPS was functionally connected to serial/temporal order processing areas in the right IPS, premotor and cerebellar cortices, while during item STM, the left IPS was connected to phonological and orthographic processing areas in the superior temporal and fusiform gyri. Our data support a position considering that the left IPS acts as an attentional modulator of distant neural networks which themselves are specialized in processing order or language representations. More generally, they strengthen attention-based accounts of verbal STM. [less ▲]

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See detailAn exploration of the relationships between short-term memory for serial order information, item information and new word learning in adults
Majerus, Steve ULg; Poncelet, Martine ULg; Elsen, B. et al

in European Journal of Cognitive Psychology (2006), 18(6), 848-873

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See detailResidual cognitive function in comatose, vegetative and minimally conscious states
Laureys, Steven ULg; Perrin, F.; Schnakers, Caroline ULg et al

in Current Opinion In Neurology (2005), 18(6), 726-733

Purpose of review The clinical evaluation of cognition in non-communicative severely brain-damaged patients is inherently difficult. In addition to novel behavioural 'consciousness-scales', the role of ... [more ▼]

Purpose of review The clinical evaluation of cognition in non-communicative severely brain-damaged patients is inherently difficult. In addition to novel behavioural 'consciousness-scales', the role of para-clinical markers of consciousness, such as event related potentials and functional neuroimaging is reviewed. Recent findings New behavioural scales for vegetative and minimally conscious patients have been shown to reduce diagnostic error but regrettably remain underused in clinical routine. Electrophysiological studies have confirmed their role in estimating outcome and possibly cognition. Several recent functional neuroimaging studies have shown residual cortical function in undeniably vegetative patients. This cortical activation, however, seems limited to primary 'low-level' areas and does not imply 'higher-order' integration, considered necessary for conscious perception. Minimally conscious patients show large-scale high-order cerebral activation, apparently dependent upon the emotional relevance of the stimulation. Summary Careful clinical assessment of putative 'conscious behaviour' in vegetative and minimally conscious patients is the first requirement for their proper diagnosis and management. Complementary functional neuroimaging and electrophysiological studies will have a major impact on future clinical decision making and may guide selective therapeutic options. At present, more experimental evidence and the elucidation of methodological and ethical controversies are awaited prior to their routine clinical use. [less ▲]

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See detailTreating verbal short-term memory deficits by increasing the duration of temporary phonological representations : a case study
Majerus, Steve ULg; Van Der Kaa, M. A.; Renard, Cécile ULg et al

in Brain & Language (2005), 95(1), 174-175

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See detailModulation of brain activity during phonological familiarization
Majerus, Steve ULg; Van der Linden, Martial ULg; Collette, Fabienne ULg et al

in Brain & Language (2005), 92(3), 320-331

We measured brain activity in 12 adults for the repetition of auditorily presented words and nonwords, before and after repeated exposure to their phonological form. The nonword phoneme combinations were ... [more ▼]

We measured brain activity in 12 adults for the repetition of auditorily presented words and nonwords, before and after repeated exposure to their phonological form. The nonword phoneme combinations were either of high (HF) or low (LF) phonotactic frequency. After familiarization, we observed, for both word and nonword conditions, decreased activation in the left posterior superior temporal gyrus, in the bilateral temporal pole and middle temporal gyri. At the same time, interaction analysis showed that the magnitude of decrease of activity in bilateral posterior temporal lobe was significantly smaller for LF nonwords, relative to words and HF nonwords. Decrease of activity in this area also correlated with the size of behavioral familiarization effects for LF nonwords. The results show that the posterior superior temporal gyrus plays a fundamental role during phonological learning. Its relationship to sublexical and lexical phonological processing as well as to phonological short-term memory is discussed. (c) 2004 Elsevier Inc. All rights reserved. [less ▲]

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See detailA quantitative and qualitative assessment of verbal short-term memory and phonological processing in 8-year-olds with a history of repetitive otitis media
Majerus, Steve ULg; Amand, Pierre; Boniver, Vincent et al

in Journal of Communication Disorders (2005), 38(6), 473-498

Language outcome in children experiencing fluctuant hearing loss due to otitis media (OME) remains highly equivocal. In the current study, we assessed performance on highly sensitive verbal short-term ... [more ▼]

Language outcome in children experiencing fluctuant hearing loss due to otitis media (OME) remains highly equivocal. In the current study, we assessed performance on highly sensitive verbal short-term memory (STM), new word learning and phonological processing tasks in 8-year-old children who had suffered from recurrent OME before the age of 3. Relative to a control group with no history of OME, we observed strictly normal performance for different STM and new word learning tasks. Performance on these tasks was also normally influenced by phonotactic, lexical and semantic variables. However, at the level of phonological processing, a small but significant decrease of performance was found in a speeded nonword identification task and a rhyme judgment task. The results of this study suggest that outcome of OME is characterized by subtle impairments at the level of perceptual-phonological analysis, but there is no significant impact on verbal STM and new word learning abilities. Learning outcomes: As a result of this activity, the participant will be able to (1) explain the outcome of recurrent OME before age 3 on later language and verbal STM development, (2) be aware of the complex relationships that link language development and verbal STM, (3) explain how fluctuant hearing loss during infancy and early childhood could affect verbal STM development and learning capacity for new phonological information, (4) describe different verbal STM measures that distinguish retention capacities for phonological and lexico-semantic information, and (5) explain the influence of phonotactic frequency on nonword processing in language and verbal STM tasks. (c) 2005 Elsevier Inc. All rights reserved. [less ▲]

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See detailTime-of-day modulations of rCBF response in functional brain imaging studies: a meta-analysis
Schmidt, Christina; Dang Vu, Thanh; Orban, Pierre et al

in NeuroImage (2005), 26(Suppl. 1),

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See detailBehavioral Evaluation of Consciousness in Severe Brain Damage
Majerus, Steve ULg; Gill-Thwaites, Helen; Andrews, Keith et al

in Progress in Brain Research (2005), 150(Boundaries of Consciousness: Neurobiology and Neuropathology), 397-413

This paper reviews the current state of bedside behavioral assessment in brain-damaged patients with impaired consciousness (coma, vegetative state, minimally conscious state). As misdiagnosis in this ... [more ▼]

This paper reviews the current state of bedside behavioral assessment in brain-damaged patients with impaired consciousness (coma, vegetative state, minimally conscious state). As misdiagnosis in this field is unfortunately very frequent, we first discuss a number of fundamental principles of clinical evaluation that should guide the assessment of consciousness in brain-damaged patients in order to avoid confusion between vegetative state and minimally conscious state. The role of standardized behavioral assessment tools is particularly stressed. The second part of this paper reviews existing behavioral assessment techniques of consciousness, showing that there are actually a large number of these scales. After a discussion of the most widely used scale, the Glasgow Coma Scale, we present several new promising tools that show higher sensitivity and reliability for detecting subtle signs of recovery of consciousness in the post-acute setting. [less ▲]

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See detailMémoire à court terme verbale et développement lexical chez l'enfant normal et l'enfant avec troubles spécifiques du langage
Majerus, Steve ULg; Poncelet, Martine ULg

in Hommet, C. (Ed.) Neuropsychologie de l'enfant et troubles du développement (2005)

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See detailCerebral processing in the minimally conscious state
Laureys, Steven ULg; Perrin, Fabien; Faymonville, Marie ULg et al

in Neurology (2004), 63(5), 916-918

We studied a patient in a minimally conscious state using PET and cognitive evoked potentials. Cerebral metabolism was below half of normal values. Auditory stimuli with emotional valence ( infant cries ... [more ▼]

We studied a patient in a minimally conscious state using PET and cognitive evoked potentials. Cerebral metabolism was below half of normal values. Auditory stimuli with emotional valence ( infant cries and the patient's own name) induced a much more widespread activation than did meaningless noise; the activation pattern was comparable with that previously obtained in controls. Cognitive potentials showed preserved P300 responses to the patient's own name. [less ▲]

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See detailCan phonological and semantic short-term memory be dissociated ? Further evidence from Landau-Kleffner syndrome
Majerus, Steve ULg; Van der Linden, Martial ULg; Poncelet, Martine ULg et al

in Cognitive Neuropsychology (2004), 21(5), 491-512

Recent studies have made a distinction between short-term storage capacities for phonological information and short-term storage capacities for lexico-semantic information (R. Martin, Lesch,

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See detailMémoire à court terme verbale : cause ou conséquence du développement du langage ?
Majerus, Steve ULg; Poncelet, Martine ULg

in Metz-Lutz, M. (Ed.) Développement cognitif et troubles des apprentissages : évaluer, comprendre, rééduquer et prendre en charge (2004)

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See detailPhonological processing in Williams syndrome
Majerus, Steve ULg

in Bartke, Susanne (Ed.) Williams syndrome across language (2004)

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See detailLes liens entre attention et mémoire à court terme verbale
Poncelet, Martine ULg; Majerus, Steve ULg

in Rééducation Orthophonique (2004), 218

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