[Creation and normalisation of a verbal episodic memory task in elderly adults: "GERIA-12"]. / Élaboration et normalisation d'une épreuve d'évaluation de la mémoire épisodique verbale chez la personne âgée: "GERIA-12".

INTRODUCTION: Early damage to episodic memory encoding and consolidation processes has been demonstrated in dementia of the Alzheimer type. However, in the domain of verbal episodic memory assessment, there are few diagnostic tools adapted to the old and oldest old as far as ease of administration and accuracy of normative data are concerned. Classic tasks are either too effortful (like the free recall/cued recall of 16 items), not sensitive enough (like the 5 words test), or insufficiently accurate for people above 70 years old in terms of normative data. AIM: The aim of this study was to develop a reduced task (in terms of number of items and number of trials) assessing verbal episodic memory in people aged between 70 and 89 years old. METHODS: The task (GERIA-12) used the same procedure as the RL/RI-16 task but the list comprised only 12 words and there were only 2 learning trials. In order to assess consolidation processes, we included 2 delayed recall trials, one after 20 minutes and the other after 24 hours. We also calculated indexes adapted from the Item-Specific Deficit Approach developed by Wright et al., which has the advantage of providing measures specific to encoding, consolidation and retrieval processes. Standardization was done with data from 220 people aged between 70 and 89 years old and belonging to 3 education levels. RESULTS: We obtained a significant effect of age and education level: scores decrease with age and increase with education. Norms have thus been calculated taking those two variables into consideration. Concerning the standardization, Barona method has been used for free recall scores while percentiles have been used for all other scores (total recall, free recall, encoding, consolidation and retrieval indexes). Normative data are also provided for intrusions and perseverations. CONCLUSION: This new task allows encoding, consolidation and retrieval processes assessment in older people and has the following advantages: the procedure is more suitable (ease and time of administration), there are accurate normative data for old and oldest old people, and there are normative data for two delayed recalls (at 20 minutes and at 24 hours).

The Addenbrooke's Cognitive Examination Revised is as effective as the original to detect dementia in a French-speaking population.

INTRODUCTION: This paper presents the validation of the French version of the Addenbrooke's Cognitive Examination Revised (ACE-R). METHODS: The variability of the 3 versions of the ACE-R (A, B and C), performed by the same observer, hence mainly 2 or 3 times on 119 patients showing no progression, was first calculated by Cronbach's alpha coefficient, t test and linear regression. The alpha coefficients of the 3 versions were obtained showing that the ACE-R versions can be considered as one, and an analysis of the interobserver variability was performed by Cohen's kappa coefficient, t test and linear regression on 12 patients. Eventually, we performed a receiver operating characteristic (ROC) analysis to compare the sensitivities and specificities to detect dementia of the ACE, the ACE-R and Mini Mental State Examination on 319 consecutive patients. RESULTS: The ROC areas of sensitivities and specificities of the ACE and ACE-R were very similar. Two cutoffs were identified at 83/100 and 89/100 with a specificity to normality of 98.6% if the ACE-R score was ≥83 and a sensitivity to dementia of 98.4% if the ACE-R score was ≤89. CONCLUSION: ACE-R in French is as reliable and valid as the original version to detect dementia.

[New promising caregiver's psychoeducation training program: a Belgian experience in dementing disorders]. / La psychoéducation des accompagnants de patients déments comme nouvelle approche thérapeutique à l'efficacité démontrée.

Facing difficulties due to dementia syndromes, systemic care is necessary. But nevertheless, caregivers are generally lacking in medical welfare. Therapies assessed specifically to caregivers are missing. Amongst these, psychoeducative steps seem to be the strongest effective's one on neuropsychiatrics symptoms. Psychoeducations tend to learn to caregivers to modify their interactions with patients via a better understanding of illnesses and patients. Our training "Pour mieux vivre avec la maladie d'Alzheimer ", done in groups of eight to twelve persons, is constituted of twelve sessions of two hours each. Complete formation includes behavioural and cognitive aspects of the disease and proposes some multidimensional approach which content at least pedagogical, psychological and cognitivo behavioural aspects. We illustrate here with the use of two peculiar cases that our program can reach its objectives. These preliminary results strongly argue for the pursuit and even extension of this kind of caregiver's management.

[Evaluation of our psycho-educative program by participating caregivers]. / Evaluation de notre programme de psychoéducation par les accompagnants de patients déments.

Facing difficulties due to dementia syndromes, systemic care is necessary. Amongst therapies assessed specifically to caregivers, psychoeducative steps seem to be the strongest effective one on neuropsychiatrics symptoms. Psychoeducations tend to teach the caregivers to modify their interactions with patients via a better understanding of illnesses and patients. Our training "Pour mieux vivre avec la maladie d'Alzheimer", applied in groups of eight to twelve persons, consists in twelve sessions of two hours each. To assure the biggest possible availability, we recently incorporated the concomitant coverage of patients into artistic workshops. These sessions of art-therapy realized in parallel to our psychoeducative program will thus be estimated according to the same rigorous methodology. The critical evaluations realized by participants at the end of our program reflect the outcome of our main objective (to teach to modify interactions with the patients) while contributing to the improvement of social contacts and to the learning of calling to existing helps. These preliminary results strongly argue for the pursuit and even extension of this kind of caregiver's management.

Alterations in resting-state network dynamics along the Alzheimer's disease continuum.

Human brain activity is intrinsically organized into resting-state networks (RSNs) that transiently activate or deactivate at the sub-second timescale. Few neuroimaging studies have addressed how Alzheimer's disease (AD) affects these fast temporal brain dynamics, and how they relate to the cognitive, structural and metabolic abnormalities characterizing AD. We aimed at closing this gap by investigating both brain structure and function using magnetoencephalography (MEG) and hybrid positron emission tomography-magnetic resonance (PET/MR) in 10 healthy elders, 10 patients with subjective cognitive decline (SCD), 10 patients with amnestic mild cognitive impairment (aMCI) and 10 patients with typical Alzheimer's disease with dementia (AD). The fast activation/deactivation state dynamics of RSNs were assessed using hidden Markov modeling (HMM) of power envelope fluctuations at rest measured with MEG. Correlations were sought between temporal properties of HMM states and participants' cognitive test scores, whole hippocampal grey matter volume and regional brain glucose metabolism. The posterior default-mode network (DMN) was less often activated and for shorter durations in AD patients than matched healthy elders. No significant difference was found in patients with SCD or aMCI. The time spent by participants in the activated posterior DMN state did not correlate significantly with cognitive scores, nor with the whole hippocampal volume. However, it correlated positively with the regional glucose consumption in the right dorsolateral prefrontal cortex (DLPFC). AD patients present alterations of posterior DMN power activation dynamics at rest that identify an additional electrophysiological correlate of AD-related synaptic and neural dysfunction. The right DLPFC may play a causal role in the activation of the posterior DMN, possibly linked to the occurrence of mind wandering episodes. As such, these data might suggest a neural correlate of the decrease in mind wandering episodes reported in pathological aging.

Is the Addenbrooke's cognitive examination effective to detect frontotemporal dementia?

We evaluated the Addenbrooke's cognitive examination (ACE), a simple instrument to differentiate frontotemporal dementia (FTD) from Alzheimer's disease (AD), in our dementia patients clinic population. The Verbal-Language/Orientation-Memory (VLOM) ratio, which compares its language and memory scores, determines whether FTD or AD is more likely. The ACE was translated into French with adaptation maintaining the number of words in the name and address learning and delayed recall test, and with cultural adaptation for the semantic memory. The 85 included subjects had no evidence of two or more organic pathologies, after at least six months of follow-up, and an MMSE score>or=20/30. Patients with cognitive impairment due to alcohol intake were excluded. The diagnosis of a specific dementing illness was based on the consensus of the neurologist and neuropsychologists in the team. Thereafter, another neurologist expert in dementia, blinded to the ACE result and to the diagnosis and treatment, reviewed all cases files and proposed a diagnosis. A diagnostic agreement was reached for 79 cases (92.9%) with 40 (50.6%) dementia: 25 AD (62.5 %), 9 FTD (22.5 %). We estimated that the sensitivity for detecting dementia of an ACE score3.2 was 72%,with a specificity of 69.4%. We conclude that, when used as originally proposed, ACE is very accurate for the detection of dementia, but much less effective in discriminating the most common frontal variant of FTD.

Personal name anomia: a single case study.

A case presenting an anomia specific for person proper names but no naming impairment either for other types of proper names or for common names is reported. The deficit was equally present both in face-naming and in naming upon definition and was not affected by the descriptiveness of the labels borne by the individuals. The patient had no semantic processing impairment either for faces or names. The results are discussed in terms of impaired access to intact phonological representations.

Could visual neglect induce amblyopia?

Oculomotor nerve disease is a common cause of diplopia. When strabismus is present, absence of diplopia has to induce the research of either uncovering of visual fields or monocular suppression, amblyopia or blindness. We describe the case of a 41-year-old woman presenting with right oculomotor paresis and left object-centred visual neglect due to a right fronto-parietal haemorrhage expanding to the right peri-mesencephalic cisterna caused by the rupture of a right middle cerebral artery aneurysm. She never complained of diplopia despite binocular vision and progressive recovery of strabismus, excluding uncovering of visual fields. Since all other causes were excluded in this case, we hypothesise that the absence of diplopia was due to the object-centred visual neglect. Partial internal right oculomotor paresis causes an ocular deviation in abduction; the image being perceived deviated contralaterally to the left. Thus, in our case, the neglect of the left image is equivalent to a right monocular functional blindness. However, bell cancellation test clearly worsened when assessed in left monocular vision confirming that eye patching can worsen attentional visual neglect. In conclusion, our case argues for the possibility of a functional monocular blindness induced by visual neglect. We think that in presence of strabismus, absence of diplopia should induce the search for hemispatial visual neglect when supratentorial lesions are suspected.

[Cognitive impairments and breast cancer: a critical review of the literature]. / Altérations cognitives et cancer du sein: une revue critique de la littérature.

Since the 1980's, women treated for breast cancer are reporting moderate cognitive impairments during and after chemotherapy. These cognitive impairments may be related to chemotherapy but also to hormone therapy, psychological distress, fatigue... This work is a critical review of the literature, which reports types of impairments, frequency, severity, causes and mechanisms involved in this issue. It also provides an update on potential moderators factors, which may be associated with mild cognitive impairments and various tools for their assessment used in the studies. These studies--selected between 1997 and 2008--show that cognitive impairments are frequently reported by patients with breast cancer but that the mechanisms are still poorly understood and that the methods of assessment are very heterogeneous and difficult to compare. This review indicates that future studies should include more homogenous patient groups, be longitudinal, use more sensitive and specific assessment tools and control moderators factors that play a role in impairment in cognitive function.

The French Addenbrooke's cognitive examination is effective in detecting dementia in a French-speaking population.

We evaluated the sensitivity and specificity of our French version of Addenbrooke's cognitive examination (ACE) to detect dementia in our patient population. One hundred and fifty-eight cases were included in the study. In our patient series, the sensitivity for diagnosing dementia with a Mini-Mental State Examination (MMSE) score of < or = 24/30 was 48.5%, the sensitivity of an MMSE score of < or = 27/30 was 82.5% with a specificity of 72.1%, the sensitivity of an ACE score of < or = 83/100 was 86.6% with a specificity of 70.5% and the sensitivity of an ACE score of < or = 88/100 was 97.9% with a specificity of 59%. We conclude that the French version of the ACE is a very accurate test for the detection of dementia, and should be widely used in clinical practice.