- ICH GCP
- Registro de ensayos clínicos de EE. UU.
- Ensayo clínico NCT01839422
Imaging of New Learning in Severe Alzheimer's Disease Patients (INCAS)
Functionnal Magnetic Resonnance Imaging (fMRI)Study of Cerebral Substrates of New Musical and Pictorial Learning in Alzheimer Patients
This research attempts to better understand the altered and preserved memory mechanisms in Alzheimer disease, particularly to better apprehend learning implicit memory processes, and give a scientific support to non-pharmalogical interventions. At the present time, it is possible to delay the emergence of the symptoms related to this disease, eventually to decrease it, but not to cure it. Yet, care these patients became a crucial question and the solutions proposed to healthy aging people are not appropriate for Alzheimer patients who present specific disorders. The improvement of the quality of life of the institutionalized patients lies on a better comprehension of their disorders but also of their preserved abilities. The literature testifies of a great heterogeneity in the clinical expression of this disease, however we noticed two constants with regard to the capabilities generally announced as being preserved, on one hand, the implicit memory, and on the other hand the artistic aptitudes, and more particularly musical capabilities.
Patients with Alzheimer disease present a particularly severe and early deterioration of episodic memory. Thus, at the beginning of the disease the explicit acquisition of new knowledge becomes increasingly difficult. However, some clinical observations, such as new learning of unknown songs, even with patients at a severe stage of the illness, seem to support the assumption of a preservation of some implicit learning abilities. Indeed, several studies already showed preserved implicit memory capabilities among patients with Alzheimer disease, mostly at the beginning stage of the illness: preserved effects of perceptual priming, procedural learning. Thus, we are mainly interested by the effects of exposure and the rising of a feeling of familiarity, both showing preserved implicit learning abilities, for moderate to severe Alzheimer patients. However, no study was carried out to date using the neuroimaging techniques, among Alzheimer patients at a moderated to severe stage of illness, with the main objective to identify the cerebral substrates implied in the learning of new knowledge.
Indeed, several studies already showed preserved implicit memory capabilities among patients with Alzheimer disease, mostly were performed at the beginning stage of the illness and none of them have studied theses learning abilities for moderate to severe Alzheimer patients.
The objective of this work is to specify, in severe form of Alzheimer disease, the cognitive mechanisms allowing the memorizing (feeling of familiarity) of new information and thus to highlight neural networks underlying this learning process (recently learned stimuli vs old stimuli). The goal is to propose a positive image of the Alzheimer patients, in understanding which cognitive mechanisms and cerebral areas allow these learning capabilities.
20 patients Alzheimer at a moderate to severe stage, 20 patients at a mild to moderate stage of the illness, and 20 healthy aging participants, are selected after a neurological interview and a neuropsychological evaluation. The whole of the included participants take part of the experimental protocol organized in two phases: - the phase of familiarization and the phase of test. The phase of familiarization consists of the repeated exposure (daily session before the MRI acquisition) of new songs and new painting until obtaining a high feeling of familiarity for each item. The phase of test is carried out in the 3T MRI camera, it comprises an anatomical (T1, T2 MRI) and a functional acquisitions. The functional acquisition corresponds to a passive listening and seeing tasks of musical and pictorial stimuli. Finally, all participants realize a debriefing phase that allows obtaining a feedback on the familiarity of stimuli presented during the functional acquisition.
Descripción general del estudio
Estado
Condiciones
Intervención / Tratamiento
Tipo de estudio
Inscripción (Anticipado)
Fase
- No aplica
Contactos y Ubicaciones
Estudio Contacto
- Nombre: Julien Chavant
- Número de teléfono: +33231065495
- Correo electrónico: memoire-rechcerche.caen@inserm.fr
Ubicaciones de estudio
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Caen, Francia, 14000
- Reclutamiento
- GIP Cyceron
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Investigador principal:
- Vincent de La Sayette, MD
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Criterios de participación
Criterio de elegibilidad
Edades elegibles para estudiar
Acepta Voluntarios Saludables
Géneros elegibles para el estudio
Descripción
Inclusion Criteria:
- Native language: French
Medical, neurological, neuropsychological and neuroradiological depth in accordance with the criteria for inclusion and exclusion-specific population, that is to say:
- Healthy Elderly volunteers: over 60 years old, living at home, without memory complaints, normal performances compared to the age and the educational level for all tests of the diagnostic battery.
- Alzheimer's patients: presenting the standard criteria of NINCDS-ADRDA probable Alzheimer's disease, including abnormal global cognitive function and deficits in at least two cognitive domains identified by the diagnostic battery.
Exclusion Criteria:
- The sudden onset of cognitive impairments (as opposed to their slow and gradual installation in Alzheimer's disease)
- A chronic neurological, psychiatric, endocrine, hepatic or infectious complaint
- A history of major disease (an uncontrolled diabetes, a lung, heart, metabolic, hematologic, endocrine disease or a severe cancer);
- A medication that may interfere with memory or metabolic measures
- A alcohol or drugs abuse
- The cons-indications to MRI (claustrophobia, metallic object in the body).
- A predominantly left-hand (score below 50% in Edinburgh Inventory)
Plan de estudios
¿Cómo está diseñado el estudio?
Detalles de diseño
- Propósito principal: Cuidados de apoyo
- Asignación: No aleatorizado
- Modelo Intervencionista: Asignación paralela
- Enmascaramiento: Ninguno (etiqueta abierta)
Armas e Intervenciones
Grupo de participantes/brazo |
Intervención / Tratamiento |
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Experimental: Controls
Memory assessment.
Brain imaging examination MRI.
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Cognitive assessment : Neuropsycological tests, learning sessions of new stimuli.
Brain imaging examination : Structural and functional MRI to compare differences between each sample.
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Experimental: Beginner Alzheimer's Disease patients
Memory assessment.
Brain imaging examination MRI.
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Cognitive assessment : Neuropsycological tests, learning sessions of new stimuli.
Brain imaging examination : Structural and functional MRI to compare differences between each sample.
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Experimental: Severe Alzheimer's Disease patients
Memory assessment.
Brain imaging examination MRI.
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Cognitive assessment : Neuropsycological tests, learning sessions of new stimuli.
Brain imaging examination : Structural and functional MRI to compare differences between each sample.
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¿Qué mide el estudio?
Medidas de resultado primarias
Medida de resultado |
Periodo de tiempo |
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Succesful learning of new songs and paintings, succesful MRI acquisitions.
Periodo de tiempo: 10 days max. One week for the learning sessions, before MRI scans done one or two days after.
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10 days max. One week for the learning sessions, before MRI scans done one or two days after.
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Colaboradores e Investigadores
Fechas de registro del estudio
Fechas importantes del estudio
Inicio del estudio
Finalización primaria (Anticipado)
Fechas de registro del estudio
Enviado por primera vez
Primero enviado que cumplió con los criterios de control de calidad
Publicado por primera vez (Estimar)
Actualizaciones de registros de estudio
Última actualización publicada (Estimar)
Última actualización enviada que cumplió con los criterios de control de calidad
Última verificación
Más información
Términos relacionados con este estudio
Términos MeSH relevantes adicionales
Otros números de identificación del estudio
- 2011-A00351-40
Esta información se obtuvo directamente del sitio web clinicaltrials.gov sin cambios. Si tiene alguna solicitud para cambiar, eliminar o actualizar los detalles de su estudio, comuníquese con register@clinicaltrials.gov. Tan pronto como se implemente un cambio en clinicaltrials.gov, también se actualizará automáticamente en nuestro sitio web. .
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