References of "Majerus, Steve"
     in
Bookmark and Share    
Full Text
Peer Reviewed
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),

Detailed reference viewed: 12 (2 ULg)
Full Text
Peer Reviewed
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 ▲]

Detailed reference viewed: 48 (5 ULg)
Full Text
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)

Detailed reference viewed: 347 (18 ULg)
Full Text
Peer Reviewed
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 ▲]

Detailed reference viewed: 59 (2 ULg)
Full Text
Peer Reviewed
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 ▲]

Detailed reference viewed: 21 (7 ULg)
Full Text
Peer Reviewed
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,

Detailed reference viewed: 25 (11 ULg)
Full Text
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)

Detailed reference viewed: 160 (24 ULg)
Full Text
See detailPhonological processing in Williams syndrome
Majerus, Steve ULg

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

Detailed reference viewed: 40 (4 ULg)
Full Text
See detailLes liens entre attention et mémoire à court terme verbale
Poncelet, Martine ULg; Majerus, Steve ULg

in Rééducation Orthophonique (2004), 218

Detailed reference viewed: 34 (12 ULg)
Full Text
See detailLes relations entre attention et langage
Poncelet, Martine ULg; Majerus, Steve ULg

in Rééducation Orthophonique (2004), 218

Detailed reference viewed: 43 (11 ULg)
Full Text
Peer Reviewed
See detailDoes sustained ERP activity in posterior lexico-semantic processing areas during short-term memory tasks only reflect activated long-term memory?
Majerus, Steve ULg; Van der Linden, Martial ULg; Collette, Fabienne ULg et al

in Behavioral and Brain Sciences (2003), 26(6), 746-747

We challenge Ruchkin et al.'s claim in reducing short-term memory (STM) to the active part of long-term memory (LTM), by showing that their data cannot rule out the possibility that activation of ... [more ▼]

We challenge Ruchkin et al.'s claim in reducing short-term memory (STM) to the active part of long-term memory (LTM), by showing that their data cannot rule out the possibility that activation of posterior brain regions could also reflect the contribution of a verbal STM buffer. [less ▲]

Detailed reference viewed: 21 (3 ULg)
Full Text
Peer Reviewed
See detailAn investigation of verbal short-term memory and phonological processing in four children with Williams syndrome
Majerus, Steve ULg; Barisnikov, K.; Vuillemin, I. et al

in Neurocase : Case Studies in Neuropsychology, Neuropsychiatry & Behavioural Neurology (2003), 9(5), 390-401

Although phonological processing is generally considered to be a proficiency in Williams syndrome (WS), there are very few studies which have extensively explored phonological processing abilities in WS ... [more ▼]

Although phonological processing is generally considered to be a proficiency in Williams syndrome (WS), there are very few studies which have extensively explored phonological processing abilities in WS. In this study, we re-assessed phonological processing in WS by exploring verbal STM and phonological awareness abilities in 4 children with WS (CA: 10-12 years) and two control groups, one matched for chronological age (CA) and the other matched for verbal mental age (VA). Our results confirm and extend previous claims of preserved phonological STM in WS by showing specifically preserved STM performance for non-words, compared to both VA and CA control groups. However, we observed that this was the case only for non-words where support of phonological and lexico-semantic knowledge was minimized, with reduced phonological and lexico-semantic effects on STM performance. Furthermore, a more direct assessment of phonological processing abilities through phonological awareness tasks showed impaired performance for the 4 WS children. Our data confirm that STM for non-words represents a real strength in. WS but they do not support previous assumptions of a more general preservation of phonological processing abilities in WS. Implications for impaired and preserved cognitive processes underlying verbal STM and phonological awareness abilities in WS are discussed. [less ▲]

Detailed reference viewed: 56 (5 ULg)
Full Text
Peer Reviewed
See detailPhonological short-term memory networks following recovery from Landau and Kleffner syndrome
Majerus, Steve ULg; Laureys, Steven ULg; Collette, Fabienne ULg et al

in Human Brain Mapping (2003), 19(3), 133-144

Landau-Kleffner syndrome (LKS) is a rare acquired aphasia occurring in otherwise healthy children, together with spike-wave discharges predominating over superior temporal regions and activated by sleep ... [more ▼]

Landau-Kleffner syndrome (LKS) is a rare acquired aphasia occurring in otherwise healthy children, together with spike-wave discharges predominating over superior temporal regions and activated by sleep. Although the outcome of language abilities is variable, a residual impairment in verbal short-term memory (STM) is frequent. This STM deficit might be related to the persistent dysfunction of those temporal lobe regions where epileptic discharges were observed during the active phase of the disorder. We tested this hypothesis by measuring brain activation during immediate serial recall of lists of 4 words, compared to single word repetition, using H(2) (15)O positron emission tomography (PET), in 3 LKS patients after recovery and in 14 healthy controls. The patients (TG, JPH, and DC) had shown abnormally increased or decreased glucose metabolism in left or right superior temporal gyrus (STG) at different stages during the active phase of their disease. At the time of this study, the patients were 6-10 years from the active phase of LKS. Results showed that Patients JPH and DC had impaired performance in the STM condition, whereas TG showed near normal performance. PET data showed that JPH and DC activated significantly less than controls left and right posterior STG. TG, having near normal STM performance, showed increased activity in the posterior part of the right STG. These data suggest that impaired verbal STM at late outcome of LKS might indeed be related to a persistent decrease of activity in those posterior superior temporal gyri that were involved in the epileptic focus during the active phase. [less ▲]

Detailed reference viewed: 38 (4 ULg)
Full Text
Peer Reviewed
See detailLong-term memory effects on verbal short-term memory : a replication study
Majerus, Steve ULg; Van der Linden, Martial ULg

in British Journal of Developmental Psychology (2003), 21(Part 2), 303-310

The influence of lexico-semantic language representations stored in long-term memory (LTM) on short-term memory (STM) performance has been studied extensively in adults. However, there are relatively few ... [more ▼]

The influence of lexico-semantic language representations stored in long-term memory (LTM) on short-term memory (STM) performance has been studied extensively in adults. However, there are relatively few data on lexico-semantic LTM effects on STM in children. On the other hand, the influence of phonological LTM effects on STM has been studied more extensively in children than in adults. In this study, we explored whether these different LTM effects on verbal STM could be replicated in both adults and children by administering immediate serial recall tasks (ISR) for high- and low-frequency words, for high- and low-imageability words, for words and non-words, and for high and low phonotactic frequency non-words to 6-, 8-, and 10-year-old children, to adolescents and to adults. Significant word frequency, lexicality and phonotactic frequency effects were observed in all age groups, as well as a word imageability effect which was, however, weaker than the other three effects. Our data suggest that LTM effects on STM are equivalent in both children and adults. [less ▲]

Detailed reference viewed: 37 (4 ULg)
Full Text
Peer Reviewed
See detailFunctional neuroimaging of auditory processing
Laureys, Steven ULg; Salmon, Eric ULg; Goldman, Serge et al

in Acta Oto-Rhino-Laryngologica Belgica (2003), 57(4), 267-273

There is a complex functional organization of the central auditory system from the brainstem to primary and associative auditory cortices. Functional neuroimaging has been used to visualize and confirm ... [more ▼]

There is a complex functional organization of the central auditory system from the brainstem to primary and associative auditory cortices. Functional neuroimaging has been used to visualize and confirm the spatial distribution of brain activation in temporal areas for the processing of simple acoustic stimuli. Brain activity is much more complex for words, and different networks can be recruited when phonological, lexical and semantic levels of processing are engaged. [less ▲]

Detailed reference viewed: 3 (0 ULg)
See detailL'évaluation des troubles de la mémoire de travail
Collette, Fabienne ULg; Poncelet, Martine ULg; Majerus, Steve ULg

in Meulemans, Thierry; Desgranges, Béatrice; Adam, Stéphane (Eds.) et al Evaluation et prise en charge des troubles mnésiques (2003)

Detailed reference viewed: 162 (13 ULg)
Full Text
Peer Reviewed
See detailA PET investigation of lexicality and phonotactic frequency in oral language processing
Majerus, Steve ULg; Collette, Fabienne ULg; Van der Linden, Martial ULg et al

in Cognitive Neuropsychology (2002), 19(4), 343-360

Lexicality and phonotactic frequency effects are observed in many cognitive studies on language processing, but little is known about their underlying neural substrates, especially with regard to ... [more ▼]

Lexicality and phonotactic frequency effects are observed in many cognitive studies on language processing, but little is known about their underlying neural substrates, especially with regard to phonotactic frequency effects. Here, we conducted a positron emission tomography (PET) study in which 11 right-handed volunteers had either to repeat or to listen to lists of words, high phonotactic frequency nonwords, and low phonotactic frequency nonwords. The comparison of word versus nonword processing consistently confirmed previous findings of left temporal and prefrontal activations classically ascribed to lexicosemantic processing. Higher activation was found in the right posterior superior temporal gyrus when comparing high phonotactic frequency nonwords to words, but not when comparing low phonotactic frequency nonwords to words. We propose that this region is implicated in the formation of temporary phonological representations for high-probability phonological events, which may support processing of high phonotactic frequency nonwords [less ▲]

Detailed reference viewed: 30 (6 ULg)