of an underlying dementing illness. Results: This is a pilot study over a 12- month period. Consequently, results anticipated within the next 12 months. Conclusions: Given the reported estimations that indicate a high rate of de- lirium in the older population, a primary aim is to determine the prevalence of confirmed cases of delirium in individuals who presented to ED of East- ern Health for 2009, as well as 2010. A further aim of the current study is to clarify the nature and extent of confusional states in older individuals who present to the three Emergency Departments within Eastern Health over a 12 month period (i.e., 2011). The final aim was to determine the proportion of patients who had been seen at ED and previously diagnosed with a delirium, but had an undetected underlying dementing illness, as detected at review post discharge. However, conclusions will drawn at the end of the study. P1-505 THEORY OF MIND IN ALZHEIMER’S DISEASE Mickael Laisney 1 , Laetitia Bon 1 , Catherine Guiziou 2 , Nathalie Daluzeau 2 , Francis Eustache 1 ,B eatrice Desgranges 1 , 1 Inserm-EPHE-UCBN / U923, Caen, France; 2 H^ opital de Lisieux, Lisieux, France. Background: Theory of Mind (ToM) allows one’s own and others’ cogni- tive and emotional mental states to be inferred. Only few studies reported ToM deficits in Alzheimer’s disease (AD). They were confined to the more complex tasks involving inference of cognitive mental states, while emotional inference was preserved. Some authors concluded that ToM def- icits in AD might be secondary to the general cognitive impairment and comprehension difficulties. However further studies are needed to clarify this issue. Methods: Sixteen AD patients and 15 Healthy con- trols (HC) matched on age, sex and education level underwent the Eyes Test assessing affective ToM and a first-order and second-order false belief (FB) task, assessing cognitive ToM. To prevent comprehen- sion difficulty, we put at patients’ disposal a glossary of the terms used in the Eyes Test and designed a visual as well as verbal FB task. Con- trol questions were used to test comprehension of FB stories. An addi- tional neuropsychological examination was also carried out. Results: A marginal group effect (t ¼ 1,9; p ¼ .067) was observed in the Eyes Test. While there was no difference between AD and HC for the comprehension questions (t ¼ 0,93; p ¼ .40), significant differences were observed be- tween the two groups for the first- (t ¼ 3,4; p ¼ .002) and the second-order FB tasks (t ¼ 2,1; p ¼ .05). In the patient group, significant correlations were found between the Eyes test score and the Mattis score, between the first-order FB and the Mattis score and between the second-order FB and executive functioning (backward digit span, Stroop number of errors and fluency performance). There were no significant correlations between the three ToM scores. Conclusions: Contrary to previous reports on AD, we observed both affective TOM and cognitive ToM impairment. Affective TOM and first-order FB deficits seem to evolve with the severity ofthe dis- ease. Cognitive TOM impairment was not due to comprehension deficits since the control tasks were not impaired. First- and second-order FB seem to result from different cognitive deficits: while first-order FB are re- lated to a general cognitive impairment, second order FB are associated with executive functioning decline. P1-506 BODY DYSMORPHIC DISORDER DRIPTS ONWARD FRONTOTEMPORAL DEMENTIA Patrizia Fiori, Civil Hospital of Ariano Irpino - II University of Naples, Ariano Irpino (AV), Armed Forces Europe, Italy. Background: The structure of our body image is the cornerstone of our psy- chophysical fitness. It is composed of a real, a perceived, an ideal and a so- cially accepted body. When these components are discordant, neuropsychological disturbs may develop, among which body dysmorphic disorder (BDD). This is a polymorphic condition, whose features range from an excessive preoccupation with a presumed or minimal flaw in ap- pearance to neglect or even exhibition of an evident defect (Fiori P and Giannetti LM, 2009). The aim of our present study is to analyze brief and long term consequences of BDD on daily life, future expectations and rela- tionships. Methods: The study is ongoing on subjects admitted at our neu- rological unit. We avail of Temperament and Character Inventory, Brief Assessment of Negative Dysmorphic Signs (Fiori P. et al, 2010), Body Dys- morphic Disorder Examination (Rosen JC and Reiter JL, 1996) and Mini In- ternational Neuropsychiatry Inventory (Sheehan DV, Lecubrier Y et al, 1994). Routine blood examinations, electroencephalogram, computerized tomography and magnetic resonance imaging are performed. Results: Our results show that BDD is a misdiagnosed disorder that may pervade any aspects of daily life with individual, relational, economic and social consequences. The psychopathological process is related to modality of at- tachment, early emotional and cognitive experiences. Comorbidity with de- pression, eating disorders, addiction and schizoaffective reactions is frequent. Moreover, a drift toward dominant or submissive behaviors is ob- served. Conclusions: Cognitive-behavioral approach seems to be the best strategy to cope with BDD. Whether this represents a congenital dysfunc- tion and/or an early deterioration of mirror neuron system is under assess- ment. The importance of finding common and shared behavioral models for such disorder is highlighted. P1-507 DISCREPANCIES OF MEMORY FUNCTIONS IN HEALTHYAND MEMORY-IMPAIRED OLDER PERSONS Alexandra Economou, Sokratis Papageorgiou, University of Athens, Athens, Greece. Background: Working memory is resistant to age-related decline rela- tive to delayed recall (Economou, 2009), and the two measures may be differentially affected by pathology (Economou et al., 2006). Delayed- working memory discrepancy may, therefore, be a useful index of the onset of memory pathology. Objectives: (a) To compare immediate and delayed recall with working memory in healthy and memory-impaired in- dividuals. (b) To examine the relationship of recall-working memory dis- crepancy scores with age and education across the different groups. Methods: A group of 152 older persons derived from a community-dwell- ing sample of 322 middle-aged and older persons, 40 amnestic Mild Cog- nitive Impairment (aMCI) patients, and 16 mild AD patients. The groups spanned a wide range of years of education and were matched for age and education. Task: A battery of tests were administered that included 3 subtests of a Greek research adaptation of the Wechsler Memory Scale 3 rd edition (WMS-III): Logical Memory I (LM I), Logical Memory II (LM II), and Letter-Number Sequencing (LNS). Measures: The 3 memory measures were z-transformed based on a normative sample and 2 discrep- ancy scores were computed by subtracting LNS from LM I and LNS from LM II. Results: Memory impaired patients showed larger discrepancy scores relative to the controls (p < .001), with higher working memory than either immediate or delayed recall; however, the two discrepancy scores did not differentiate aMCI from AD patients in multivariate analyses. Discrepancy scores correlated significantly but slightly with age and years of education in the control group but not in the two im- paired groups. The more educated participants showed higher working memory than either immediate or delayed recall relative to the less ed- ucated participants. Conclusions: The discrepancy scores are sensitive to memory impairment, without being affected by age and education. Higher working memory than recall in the impaired groups indicates that working memory is resistant to decline relative to immediate and delayed recall, both in older persons of higher education and in aMCI and AD patients. The relative preservation of working memory in persons of higher educa- tion is consistent with the view that cognitive reserve is mediated through education or IQ. Poster Presentations P1 S275