Centre d'Information et de documentation du CRA Rhône-Alpes
CRA
Informations pratiques
-
Adresse
Centre d'information et de documentation
du CRA Rhône-Alpes
Centre Hospitalier le Vinatier
bât 211
95, Bd Pinel
69678 Bron CedexHoraires
Lundi au Vendredi
9h00-12h00 13h30-16h00Contact
Tél: +33(0)4 37 91 54 65
Mail
Fax: +33(0)4 37 91 54 37
-
Détail de l'auteur
Auteur Jordan GRAFMAN |
Documents disponibles écrits par cet auteur (2)
Faire une suggestion Affiner la recherche
Distinctions and similarities among working memory processes: an event-related potential study / Daniel S. RUCHKIN in Cognitive Brain Research, 1-1 (June 1992)
[article]
Titre : Distinctions and similarities among working memory processes: an event-related potential study Type de document : Texte imprimé et/ou numérique Auteurs : Daniel S. RUCHKIN, Auteur ; Ray JR JOHNSON, Auteur ; Jordan GRAFMAN, Auteur ; Howard CANOUNE, Auteur ; Walter RITTER, Auteur Année de publication : 1992 Article en page(s) : p.53-66 Langues : Anglais (eng) Mots-clés : Event-related-potential Slow-wave Working-memory Short-term-memory Visuo-spatial-sketch-pad Articulatory-rehearsal Index. décimale : PER Périodiques Résumé : Working memory has been conceptualized as consiting of a number of components, such as an articulatory loop for rehearsing verbal material, a visuo-spatial sketch pad for maintaining visual images and a central executive that controls which information is made available for conscious processing. We recorded event-related brain potentials (ERPs) from normal human subjects while they maintained either visuo-spatial or phonological material in short-term memory for a 5-s interval. The results indicated that specialized brain systems for short-term storage of phonological and visuo-spatial information could be identified on the basis of marked differences between the topographies and morphologies of the ERP components elicited during these two types of short-term memory. The differences emerged during early encoding stages and continued through later retention stages. Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=780
in Cognitive Brain Research > 1-1 (June 1992) . - p.53-66[article] Distinctions and similarities among working memory processes: an event-related potential study [Texte imprimé et/ou numérique] / Daniel S. RUCHKIN, Auteur ; Ray JR JOHNSON, Auteur ; Jordan GRAFMAN, Auteur ; Howard CANOUNE, Auteur ; Walter RITTER, Auteur . - 1992 . - p.53-66.
Langues : Anglais (eng)
in Cognitive Brain Research > 1-1 (June 1992) . - p.53-66
Mots-clés : Event-related-potential Slow-wave Working-memory Short-term-memory Visuo-spatial-sketch-pad Articulatory-rehearsal Index. décimale : PER Périodiques Résumé : Working memory has been conceptualized as consiting of a number of components, such as an articulatory loop for rehearsing verbal material, a visuo-spatial sketch pad for maintaining visual images and a central executive that controls which information is made available for conscious processing. We recorded event-related brain potentials (ERPs) from normal human subjects while they maintained either visuo-spatial or phonological material in short-term memory for a 5-s interval. The results indicated that specialized brain systems for short-term storage of phonological and visuo-spatial information could be identified on the basis of marked differences between the topographies and morphologies of the ERP components elicited during these two types of short-term memory. The differences emerged during early encoding stages and continued through later retention stages. Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=780 Precision and accuracy of subjective time estimation in different memory disorders / Paolo NICHELLI in Cognitive Brain Research, 1-2 (April 1993)
[article]
Titre : Precision and accuracy of subjective time estimation in different memory disorders Type de document : Texte imprimé et/ou numérique Auteurs : Paolo NICHELLI, Auteur ; Jordan GRAFMAN, Auteur ; Annalena VENNERI, Auteur ; Mariangela MOLINARI, Auteur ; Federica TAVANI, Auteur Année de publication : 1993 Article en page(s) : p.87-93 Langues : Anglais (eng) Mots-clés : Time-perception Neuropsychology Amnesia Frontal-lobe Alzheimer's-dementia Index. décimale : PER Périodiques Résumé : The aim of this study was to evaluate how different memory disorders affect subjective time durations. For this purpose we studied prospective time estimations in 4 amnesic (A) and in 15 Alzheimer's disease (AD) patients, and compared their performance with that of 5 matched young normal controls (YC) and 15 elderly subjects (EC). For the short-time durations we asked the subject to repeatedly reproduce a standard interval of 1 s. To test how subjects evaluated longer time durations, we choose a verbal estimation procedure. The subjects' task was to read either 5, 10, 20, or 40 digits appearing one at a time, while concurrently keeping the rhythm of 1 key press per second. At the end of each sequence, subjects had to judge the elapsed time from the beginning of the trial. Results showed that amnesics can correctly reproduce 1-s intervals. However, their accuracy of verbal estimates of longer durations was severely impaired. AD patients showed increased variability on repeated reproduction of 1-s intervals and were both inaccurate and imprecise in their verbal estimate of longer durations. Using the framework of the Scalar Timing Model, we conclude that amnesic patients exhibit a deficit in encoding and storing the current time for intervals that exceed their short-term memory range, while AD patients show a pattern of deficit that is explained by a more widespread involvement of both the clock, the memory, and the decisional mechanisms. Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=780
in Cognitive Brain Research > 1-2 (April 1993) . - p.87-93[article] Precision and accuracy of subjective time estimation in different memory disorders [Texte imprimé et/ou numérique] / Paolo NICHELLI, Auteur ; Jordan GRAFMAN, Auteur ; Annalena VENNERI, Auteur ; Mariangela MOLINARI, Auteur ; Federica TAVANI, Auteur . - 1993 . - p.87-93.
Langues : Anglais (eng)
in Cognitive Brain Research > 1-2 (April 1993) . - p.87-93
Mots-clés : Time-perception Neuropsychology Amnesia Frontal-lobe Alzheimer's-dementia Index. décimale : PER Périodiques Résumé : The aim of this study was to evaluate how different memory disorders affect subjective time durations. For this purpose we studied prospective time estimations in 4 amnesic (A) and in 15 Alzheimer's disease (AD) patients, and compared their performance with that of 5 matched young normal controls (YC) and 15 elderly subjects (EC). For the short-time durations we asked the subject to repeatedly reproduce a standard interval of 1 s. To test how subjects evaluated longer time durations, we choose a verbal estimation procedure. The subjects' task was to read either 5, 10, 20, or 40 digits appearing one at a time, while concurrently keeping the rhythm of 1 key press per second. At the end of each sequence, subjects had to judge the elapsed time from the beginning of the trial. Results showed that amnesics can correctly reproduce 1-s intervals. However, their accuracy of verbal estimates of longer durations was severely impaired. AD patients showed increased variability on repeated reproduction of 1-s intervals and were both inaccurate and imprecise in their verbal estimate of longer durations. Using the framework of the Scalar Timing Model, we conclude that amnesic patients exhibit a deficit in encoding and storing the current time for intervals that exceed their short-term memory range, while AD patients show a pattern of deficit that is explained by a more widespread involvement of both the clock, the memory, and the decisional mechanisms. Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=780