Displaying publications 1 - 20 of 78 in total

Abstract:
Sort:
  1. Vision impairment and cognitive function among urban-dwelling malaysians aged 55 years and over from the Malaysian Elders Longitudinal Research (MELoR) study
    Effendi-Tenang I, Tan MP, Khaliddin N, Jamaluddin Ahmad M, Amir NN, Kamaruzzaman SB, et al.
    Arch Gerontol Geriatr, 2020 06 26;90:104165.
    PMID: 32650156 DOI: 10.1016/j.archger.2020.104165
    INTRODUCTION: Published literature on vision impairment and cognitive function amongst older Malaysians remains scarce. This study investigates the association between vision impairment and cognitive function in an older Malaysian population.

    METHODS: Subjects aged 55 years and above from the Malaysian Elders Longitudinal Research (MELoR) study with available information on vision and Montreal Cognitive Assessment (MoCA) scores were included. Data were obtained through a home-based interview and hospital-based health check by trained researchers. Visual acuity (VA) was assessed with logMAR score with vision impairment defined as VA 6/18 or worse in the better-seeing eye. Cognition was evaluated using the MoCA-Blind scoring procedure. Those with a MoCA-Blind score of <19/22 were considered to have cognitive impairment.

    RESULTS: Data was available for 1144 participants, mean (SD) age = 68.57 (±7.23) years. Vision impairment was present in 143 (12.5 %) and 758 (66.3 %) had MoCA-Blind score of <19. Subjects with vision impairment were less likely to have a MoCA-Blind score of ≥19 (16.8 % vs 36.2 %, p < 0.001). Vision impairment was associated with poorer MoCA-Blind scores after adjustments for age, gender, and ethnicity (β = 2.064; 95 % CI, -1.282 to 3.320; P = 0.003). In those who had > 6 years of education attainment, vision impairment was associated with a significant reduction of cognitive function and remained so after adjustment for age and gender (β = 1.863; 95 % CI, 1.081-3.209; P = 0.025).

    CONCLUSION: Our results suggest that vision impairment correlates with cognitive decline. Therefore, maintaining good vision is an important interventional strategy for preventing cognitive decline in older adults.

    Matched MeSH terms: Cognition Disorders*
  2. Fulltext Verbal working memory in schizophrenia: relationship to cigarette smoking and psychopathology
    Hazura, H., Wan Norhaida, W.A., Zahiruddin, O., Ruzita, J.
    Malaysian Journal of Psychiatry, 2012;21(1):0-0.
    MyJurnal
    Introduction: A number of researches suggest smoking serves as a form of self-medication to reduce the side effects of antipsychotic medications, to alleviate negative symptoms, and/or to ameliorate a number of cognitive deficits associated with schizophrenia. Objective: The aim of this study was to investigate the association of cigarette smoking with verbal working memory and psychopathology of patients with schizophrenia. Methods: Fifty-three patients with schizophrenia were assessed by a single rater using the Malay Version of Auditory Verbal Learning Test (MVAVLT) and Positive and Negative Syndrome Scale (PANSS). Smokers (n=30) were compared with nonsmokers (n=23) on socio-demographic, clinical, psychopathology and verbal memory variables. Single linear and multiple regression analysis were performed to determine factors associated with verbal memory performance.
    Results: Verbal working memory performance is associated with lower number of admission to ward, lesser severity of the negative symptoms or general psychopathology of schizophrenia and use of atypical antipsychotics in all schizophrenic subjects. Smokers with schizophrenia scored higher than non- smoker in measures that reflect immediate memory, delayed recall and recognition memory. However, the association between verbal working
    memory performance and smoking status was found to be not significant. Conclusion: Verbal working memory performance is associated with negative symptoms but not positive symptoms. This study failed to detect association of smoking on verbal working memory.
    Matched MeSH terms: Cognition Disorders
  3. Tocotrienol-Rich Fraction Modulates Amyloid Pathology and Improves Cognitive Function in AβPP/PS1 Mice
    Ibrahim NF, Yanagisawa D, Durani LW, Hamezah HS, Damanhuri HA, Wan Ngah WZ, et al.
    J Alzheimers Dis, 2017;55(2):597-612.
    PMID: 27716672
    Alzheimer's disease (AD) is the most common cause of dementia. The cardinal neuropathological characteristic of AD is the accumulation of amyloid-β (Aβ) into extracellular plaques that ultimately disrupt neuronal function and lead to neurodegeneration. One possible therapeutic strategy therefore is to prevent Aβ aggregation. Previous studies have suggested that vitamin E analogs slow AD progression in humans. In the present study, we investigated the effects of the tocotrienol-rich fraction (TRF), a mixture of vitamin E analogs from palm oil, on amyloid pathology in vitro and in vivo. TRF treatment dose-dependently inhibited the formation of Aβ fibrils and Aβ oligomers in vitro. Moreover, daily TRF supplementation to AβPPswe/PS1dE9 double transgenic mice for 10 months attenuated Aβ immunoreactive depositions and thioflavin-S-positive fibrillar type plaques in the brain, and eventually improved cognitive function in the novel object recognition test compared with control AβPPswe/PS1dE9 mice. The present result indicates that TRF reduced amyloid pathology and improved cognitive functions, and suggests that TRF is a potential therapeutic agent for AD.
    Matched MeSH terms: Cognition Disorders/drug therapy*; Cognition Disorders/etiology*
  4. Time course of motor and cognitive functions after chronic cerebral ischemia in rats
    Damodaran T, Hassan Z, Navaratnam V, Muzaimi M, Ng G, Müller CP, et al.
    Behav Brain Res, 2014 Dec 15;275:252-8.
    PMID: 25239606 DOI: 10.1016/j.bbr.2014.09.014
    Cerebral ischemia is one of the leading causes of death and long-term disability in aging populations, due to the frequent occurrence of irreversible brain damage and subsequent loss of neuronal function which lead to cognitive impairment and some motor dysfunction. In the present study, the real time course of motor and cognitive functions were evaluated following the chronic cerebral ischemia induced by permanent, bilateral occlusion of the common carotid arteries (PBOCCA). Male Sprague Dawley rats (200-300g) were subjected to PBOCCA or sham-operated surgery and tested 1, 2, 3 and 4 weeks following the ischemic insult. The results showed that PBOCCA significantly reduced step-through latency in a passive avoidance task at all time points when compared to the sham-operated group. PBOCCA rats also showed significant increase in escape latencies during training in the Morris water maze, as well as a reduction of the percentage of times spend in target quadrant of the maze at all time points following the occlusion. Importantly, there were no significant changes in locomotor activity between PBOCCA and sham-operated groups. The BDNF expression in the hippocampus was 29.3±3.1% and 40.1±2.6% on day 14 and 28 post PBOCCA, respectively compared to sham-operated group. Present data suggest that the PBOCCA procedure effectively induces behavioral, cognitive symptoms associated with cerebral ischemia and, consequently, provides a valuable model to study ischemia and related neurodegenerative disorder such as Alzheimer's disease and vascular dementia.
    Matched MeSH terms: Cognition Disorders/etiology*
  5. Fulltext Thyroid disorders and psychiatric morbidities
    Sapini Y, Rokiah P, Nor Zuraida Z
    Malaysian Journal of Psychiatry, 2009;18(2):1-9.
    MyJurnal
    The functional behavior of the thyroid is fundamental in most diseases and represents the basis for diagnosis and therapy. The status can be euthyroidism, hypothyroidism or hyperthyroidism. The psychiatric manifestation varies in different thyroid status. Those with hypothyroidism were described to have depression, psychosis and cognitive dysfunction. Meanwhile, those with hyperthyroidism were found to have psychosis, aggression, anxiety as well as cognitive impairment.
    Matched MeSH terms: Cognition Disorders
  6. Fulltext The prognostic value of early follow-up computerized tomography of the brain in adult traumatic brain injury
    Kiflie A, Alias NA, Abdul-Kareem MM, Mar W, Abdullah J, Naing NN
    Med J Malaysia, 2006 Oct;61(4):466-73.
    PMID: 17243525 MyJurnal
    A total of 31 adult patients with moderate and severe head injury were assessed clinically on admission for Glasgow Coma Scale (GCS) and short test of mental status (STMS) on follow-up and compared to their initial and follow up CT scan. Good predictors were admission GCS, midline shift, volume of subdural haemorrhage in the initial CT scan of the brain as well as the presence of post-traumatic hydrocephalus, gliosis and site of gliosis in the follow-up CT scan. There was no direct correlation between the significant predictors on the first CT scan and the follow-up CT scan of the brain.
    Matched MeSH terms: Cognition Disorders/etiology; Cognition Disorders/rehabilitation*
  7. Fulltext The prevalence of cognitive impairment and depression and their associated factors in an elderly population in two villages in Kedah.
    A Rashid, K., Narayan, K.A., Azizah, A.M.
    Malaysian Journal of Public Health Medicine, 2006;6(1):29-37.
    MyJurnal
    The population of the world is ageing and Malaysia is no exception. The proportion of those above 60 will be 9.5% by the year 2020. Cognitive impairment and depression are two common problems in this age group. The objective of this study was to determine the prevalence of cognitive impairment and depression and their associated factors in the elderly population in a rural community in Kedah. The study design was descriptive cross sectional study. A standardized questionnaire was used in two villages in Mukim Kota Kuala Muda. Barthels index, geriatric depression scale and elderly cognitive assessment questionnaire were also used. The prevalence rate of cognitive impairment was 18.5%. Cognitive impairment was higher among females (22.6%) than males (12.8%). 34.8% of the widowed were cognitively impaired and it increases with age 15.1% within age groups 60 to 69 years, 42.9% in age groups 80 to 89 years and the one and only participant above 90 years was cognitively impaired. Among those with disability, the only one with very severe disability had cognitive impairment, 40% among the severely disabled and 33. 3% among the moderately disabled (p<0.05). Those with cognitive impairment were living with some functional disabilities involving feeding (p<0.05), bathing (p<0.05), grooming (p<0.05), dressing (p<0.05), bladder control (p<0.05), toilet use (p<0.05), transfer from bed to chair (p<0.05), mobility on level surfaces (p<0.05) and climbing stairs (p<0.05). The prevalence of depression was found to be 46.4%. Higher among males (48.4%) as compared to females (44.7%). Depression was 50.0% among the age groups 80 to 89 and 52.4% among the age groups 70 to 79. 63.6% of those living alone were depressed as were 54.8% of the unemployed. 43.8% of those depressed had functional disability. The only one with severe disability was depressed and 66. 7% of those with severe disability were depressed. 47.5% of those with hypertension were depressed. It is a matter of concern that even in a small population the rate of cognitive impairment and mental depression is very high. Health screening is an important aspect of health promotion and disease prevention in people over 60 years. Although screening for many conditions cannot conclusively prove benefit, special attention to these factors can decrease morbidity and improve quality of life in aging population.
    Key words: elderly, cognitive impairment, depression, rural community, Malaysia
    Study site: Two villages in Mukim Kota Kuala Muda, Kuala Muda District, Kedah, Malaysia
    Device, Questionnaire & Scale: Barthels index; Geriatric Depression Scale (GDS-30); Elderly Cognitive Assessment Questionnaire
    Matched MeSH terms: Cognition Disorders
  8. Fulltext The consequences of tinnitus and tinnitus severity on cognition: A review of the behavioural evidence
    Mohamad N, Hoare DJ, Hall DA
    Hear Res, 2016 Feb;332:199-209.
    PMID: 26523370 DOI: 10.1016/j.heares.2015.10.001
    People with tinnitus report anecdotal difficulties in mental concentration and psychological treatments for tinnitus advise on concentration difficulties and how to manage them. Yet the literature lacks any coherent discussion about what precise theoretical cognitive constructs might be mediating reported concentration problems. This review addresses this gap by describing and critically appraising the behavioural evidence for the effects of tinnitus on cognitive performance (namely working memory and attention). Empirical evidence is somewhat limited, but there is some support that tinnitus interferes with executive attention, and mixed support that it impairs working memory and selective attention. We highlight a number of methodological considerations to help drive the field forward and we propose a putative model of the complex inter-relationships between tinnitus, cognition and confounding factors. This model provides a basis for hypothesis testing.
    Matched MeSH terms: Cognition Disorders/diagnosis; Cognition Disorders/etiology*
  9. Fulltext The association of nutritional risk with physical and mental health problems among elderly in a semi-urban area of Mukim Kajang, Selangor, Malaysia
    Mohd Sidik S, Rozali A, Shiran MS, Sam AA
    Malays J Nutr, 2004 Sep;10(2):149-58.
    PMID: 22691736 MyJurnal
    Imbalances and deficiencies of nutrients are particularly prevalent among the elderly, resulting in increased risk of illness and impaired outcome, as well as reduced quality of life. A cross-sectional study was conducted to assess the nutritional risk and to determine its association with physical and mental health problems among the elderly in a semiurban community in the District of Hulu Langat, Selangor. Elderly people aged 60 years and above were included in the study, conducted from 11th March to 10th May 2004. Data were collected using a questionnaire-guided interview method. The Nutrition Screening Initiative Checklist (NSI-13) was used to assess the level (low, moderate, high) of nutritional risk of the subjects. The questionnaire also included the Barthel Index, Geriatric Depression Scale (GDS-30) and Elderly Cognitive Assessment Questionnaire (ECAQ) to identify functional status, depressive symptoms and cognitive impairment respectively, among the respondents. Out of 316 elderly residents, 300 agreed to participate in the study (response rate 94.9%). Respondents aged from 60 to 93 years old and the mean age was 67.08±6.6. Prevalence of moderate and high nutritional risks were 25.3% and 36.3% respectively. Nutritional risks were found to be significantly associated with age (p=0.015), marital status (p=0.00), chronic illness (p=0.000), functional disability (p=0.000) and depressive symptoms (p=0.010). In conclusion, the health status of the elderly strongly depends on their nutritional risk. Age, marital status, chronic illness, functional disability and depressive symptoms are factors to be emphasised when assessing the nutritional risk of the elderly.
    Study site: Hulu Langat District, Selangor, Malaysia
    Device, Questionnaire & Scale: Nutrition Screening Initiative Checklist (NSI-13); Barthel Index; Geriatric Depression Scale (GDS-30); Elderly Cognitive Assessment Questionnaire (ECAQ)
    Prevalence data: Depression 6.3%, cognitive impairment 8.3%
    Matched MeSH terms: Cognition Disorders
  10. Fulltext The Influence of Demographic, Clinical, Psychological and Functional Determinants on Post-stroke Cognitive Impairment at Day Care Stroke Center, Malaysia
    Mohd Zulkifly MF, Ghazali SE, Che Din N, Subramaniam P
    Malays J Med Sci, 2016 Mar;23(2):53-64.
    PMID: 27547115 MyJurnal
    This study aims to estimate the prevalence and explore the predictors for post-stroke cognitive impairment at the community level in Malaysia.
    Matched MeSH terms: Cognition Disorders
  11. Fulltext The Association Between Diabetes and Cognitive Function in Later Life
    Momtaz YA, Hamid TA, Bagat MF, Hazrati M
    Curr Aging Sci, 2019;12(1):62-66.
    PMID: 31589113 DOI: 10.2174/1874609812666190614104328
    INTRODUCTION: Although diabetes through several possible mechanisms such as increased microvascular pathology and inefficiency of glucose utilization during cognitive tasks can be associated with cognitive impairment, there is inconclusive evidence that shows elderly diabetic patients under therapy have higher cognitive function compared to their non-diabetics counterparts. The present study was conducted to elucidate the association between diabetes and cognitive function in later life.

    METHODS: Data for this study, consisting of 2202 older adults aged 60 years and above, were taken from a population-based survey entitled "Identifying Psychosocial and Identifying Economic Risk Factor of Cognitive Impairment among Elderly. Data analysis was conducted using the IBM SPSS Version 23.0.

    RESULTS: The mean of MMSE was found to be 22.67 (SD = 4.93). The overall prevalence of selfreported diabetes was found to be 23.6% (CI95%: 21.8% - 25.4%). The result of independent t-test showed diabetic subjects had a higher mean score of MMSE (M = 23.05, SD =4 .55) than their counterparts without diabetes (M = 22.55, SD = 5.04) (t = -2.13 p

    Matched MeSH terms: Cognition Disorders/diagnosis*; Cognition Disorders/epidemiology*
  12. Symposium on nutrition and cognition: towards research and application for different life stages
    Benton D, Winichagoon P, Ng TP, Tee ES, Isabelle M
    Asia Pac J Clin Nutr, 2012;21(1):104-24.
    PMID: 22374567
    A SYMPOSIUM ON NUTRITION AND COGNITION: Towards research and application for different life stages was held on October 2010 in Malaysia. The influence of diet and nutrition on the cognitive development of the child and on cognitive decline in later life was reviewed. Central to the study of such topics is the assessment of cognitive functioning. Cognitive functioning falls into six main areas: executive functioning, memory, attention, perception, psychomotor and language skills, although each domain can be further subdivided. As it is in the nature of human functioning that the performance on any cognitive test can reflect aspects of many of these domains, ideally a battery of tests should be used to establish the basis of any difference in performance. In intervention studies, frequently there has been a failure to demonstrate a beneficial influence of changes in diet. A possible reason is that studies have failed to acknowledge the time scale and critical ages over which diet has an impact. Diet may have a slow and progressive influence making it difficult for short-term studies to show an improvement. In addition, as many factors influence human behaviour, dietary interventions should only be one part of a coordinated approach; the effect of diet will depend on the social and psychological context in which an individual lives. Placing diet into a broader social and psychological context greatly increases the chance of generating significant findings. This report highlights and reviews presentations and discussions at the symposium.
    Matched MeSH terms: Cognition Disorders
  13. Subjective memory and concentration deficits in medication-free, non-elderly Asians with major depressive disorder: prevalence and their correlates
    Srisurapanont M, Bautista D, Chen CH, Wang G, Udomratn P, Eurviriyanukul K
    J Affect Disord, 2015 Jan 15;171:105-10.
    PMID: 25303026 DOI: 10.1016/j.jad.2014.09.007
    BACKGROUND: Subjective cognitive impairment (SCI) in major depressive disorder (MDD) is prevalent and correlated with disability. This study aimed to examine the prevalence rates and correlates of subjective memory deficit (SMD) and subjective concentration deficit (SCD) in medication-free, non-elderly Asians with MDD.
    METHODS: The SMD and SCD were assessed by using two items of the Symptom Checklist-90-Revised (SCL-90-R). Other measurements of interest included the Montgomery-Asberg Depression Rating Scale (MADRS), the Fatigue Severity Scale (FSS), the Sheehan Disability Scale (SDS), and the Short Form Health Survey (SF-36). Adjusted odds ratios with 95% confidence intervals were calculated.
    RESULTS: Of 515 participants from China, Korea, Malaysia, Singapore, Taiwan, and Thailand, 347 (67.4%) and 377 (73.2%) had SMD and SCD, respectively. In total, 420 participants (81.6%) had SMD alone, SCD alone, and both deficits. Severe depression and poor mental health were significant correlates of SMD. Severe depression, clinically significant disability, poor physical health, and poor mental health were significantly independent correlates of SCD. Compared with young adults (18-34 years), older adults aged 50-65 years had a significantly lower risk of SCD (OR=.33, 95% CI: .19-.57).
    LIMITATIONS: Only two SCL-90-R items were used to assess the SMD and SCD. The exclusion of MDD patients treated with psychotropic medications eliminated many patients commonly seen in typical clinic settings.
    CONCLUSION: SMD and SCD are prevalent in medication-free, non-elderly Asians with MDD. Both deficits are correlated with depression and mental health status. The independent correlation between SCD and disability underscores the crucial role of SCI in MDD.
    KEYWORDS: Asian; Cognitive impairment; Depressive disorders; SCL-90-R; Subjective
    Matched MeSH terms: Cognition Disorders/ethnology*; Cognition Disorders/psychology
  14. Fulltext Sociodemographic correlates of unipolar major depression among the Chinese elderly in Klang Valley, Malaysia: an epidemiological study
    Verma RK, Min TH, Chakravarthy S, Barua A, Kar N
    ScientificWorldJournal, 2014;2014:812712.
    PMID: 25544962 DOI: 10.1155/2014/812712
    BACKGROUND: Depression, as one of the most disabling diseases around the world, had caught the global concern with its rising prevalence rate. There is a growing need of detecting depression, particularly in the old age population which is often left being overlooked.
    METHODS: We conducted a cross-sectional community-based study which included 150 Chinese elderly aged 60 and above within Klang Valley area. We obtained the sociodemographic profiles and assessed the status of well-being, depression, and cognitive function of the participants with the help of instruments: WHO Five-Item Well-Being Index, Major (ICD-10) Depression Inventory, and 6-Item Cognitive Impairment Test.
    RESULTS: We found that the prevalence of depression among the Chinese elderly within Klang Valley region was 10.7%. With multiple logistic regression, decision to consult doctor on depressed mood or memory problem and presence of cognitive impairment were shown to be significantly associated with unipolar major depression, whereas wellbeing status was also found to be statistically correlated with depression in univariate analysis.
    CONCLUSION: The prevalence of unipolar depression among Chinese elderly within Klang Valley, Malaysia presented that there was an increased trend compared to the previous studies..
    Matched MeSH terms: Cognition Disorders/ethnology; Cognition Disorders/epidemiology*; Cognition Disorders/physiopathology
  15. Fulltext Smoking and cognitive impairment among older persons in Malaysia
    Momtaz YA, Ibrahim R, Hamid TA, Chai ST
    Am J Alzheimers Dis Other Demen, 2015 Jun;30(4):405-11.
    PMID: 25260596 DOI: 10.1177/1533317514552318
    INTRODUCTION: Previous studies have shown conflicting results on the association between smoking and cognitive function. This study aims to examine the relationship of smoking with cognitive function.

    METHODOLOGY: Data for the study, consisting of 2553 older adults aged 60 years and older, were drawn from a nationwide household survey entitled "Determinants of Wellness among Older Malaysians: A Health Promotion Perspective" conducted in 2010.

    RESULTS: Current smokers had lower rates of cognitive impairment compared to never smokers (17.4% vs 25.9%), while cognitive function in former or ex-smokers was almost similar to that of the never smokers. Findings from multiple logistic regression analysis showed that current smokers were 37% less likely to be cognitively impaired, compared to the never smokers (odds ratio [OR] = .63; 95% confidence interval [CI]: .46-.86) while controlling for potential confounders. No difference in cognitive function was observed between former smokers and never smokers (OR = .94; 95% CI: .71-1.25).

    CONCLUSION: Although the findings indicated a negative association between cigarette smoking and cognitive impairment, we are unable to conclude whether this relationship is causal or affected by other unmeasured confounding factors, especially survival bias.

    Matched MeSH terms: Cognition Disorders/epidemiology; Cognition Disorders/prevention & control*
  16. Serum folate concentration, cognitive impairment, and DNA damage among elderly individuals in Malaysia
    Lee LK, Shahar S, Rajab N
    Nutr Res, 2009 May;29(5):327-34.
    PMID: 19555814 DOI: 10.1016/j.nutres.2009.05.006
    The notion that dietary factors affect cognitive function and subsequently the risk of dementia has increased over the years from a global viewpoint. Because low folate intake has been described to impair cognitive function, we tested the hypothesis that low serum folate concentration is associated with cognitive impairment and an attenuated increase in DNA damage. We investigated the relationship between serum folate concentration, cognitive impairment, and DNA damage among elderly people attending health clinics in Klang Valley, an urban area in Malaysia. Two hundred thirty-two participants, composed of 115 men (49.6%) and 117 women (50.4%), were involved; none of the patients were diagnosed with neuropsychiatric problems, nor where they terminally ill. Sociodemography and health variables were assessed through face-to-face interview. Cognitive impairment review was conducted through an Elderly Cognitive Assessment Questionnaire. The estimation of dietary intake, serum folate concentration, and DNA damage was individually analyzed using validated Dietary History Questionnaires, immunoassay methods, and an Alkaline Comet Assay study (10 mL of peripheral venous blood), respectively. Results indicated that more men had cognitive impairment (33.0%) and DNA damage (27.0% for percentage DNA in tail, 22.6% tail moment) compared with women (25.6%, 15.4%, and 15.4%, respectively) (P < .05 for all parameters), recording an average folate deficiency value of 13.9% (0.2% higher than women). Multivariate binary logistic regression analysis outlined the association of cognitive impairment with older age (odds ratio [OR], 2.74; 95% confidence interval [CI], 1.35-5.57), smoking habits (OR, 5.12; 95% CI, 2.48-10.57), poor serum folate concentration (OR, 3.46; 95% CI, 1.26-9.52), and DNA damage (percentage DNA in tail) (OR, 13.70; 95% CI, 1.36-138.29). In conclusion, this study highlighted the important role of serum folate concentration for cognitive function and provided a concise picture regarding the elevated levels of oxidative DNA damage in peripheral lymphocytes.
    Matched MeSH terms: Cognition Disorders/blood; Cognition Disorders/genetics; Cognition Disorders/epidemiology*
  17. Scopolamine, a Toxin-Induced Experimental Model, Used for Research in Alzheimer's Disease
    Chen WN, Yeong KY
    CNS Neurol Disord Drug Targets, 2020;19(2):85-93.
    PMID: 32056532 DOI: 10.2174/1871527319666200214104331
    Scopolamine as a drug is often used to treat motion sickness. Derivatives of scopolamine have also found applications as antispasmodic drugs among others. In neuroscience-related research, it is often used to induce cognitive disorders in experimental models as it readily permeates the bloodbrain barrier. In the context of Alzheimer's disease, its effects include causing cholinergic dysfunction and increasing amyloid-β deposition, both of which are hallmarks of the disease. Hence, the application of scopolamine in Alzheimer's disease research is proven pivotal but seldom discussed. In this review, the relationship between scopolamine and Alzheimer's disease will be delineated through an overall effect of scopolamine administration and its specific mechanisms of action, discussing mainly its influences on cholinergic function and amyloid cascade. The validity of scopolamine as a model of cognitive impairment or neurotoxin model will also be discussed in terms of advantages and limitations with future insights.
    Matched MeSH terms: Cognition Disorders
  18. Fulltext Relationship between traditional Malaysian vegetables (ulam) intake and cognitive status among middle-aged adults from low cost residential areas
    Yee, Xing You, Suzana Shahar, Hasnah Haron, Hanis Mastura Yahya, Normah Che Din
    Jurnal Sains Kesihatan Malaysia, 2019;17(3):139-148.
    MyJurnal DOI: 10.17576/JSKM-2019-16
    Ulam is fresh traditional Malaysian vegetables which normally consumed in raw form or after a short blanching process.It contains high antioxidants and polyphenols. However, there is limited study about the relationship between ulam consumption and cognitive status. Thus, a cross sectional study was conducted to determine the relation with cognitive function among 132 middle-aged Malays adults (45-59 years old), ecruited by convenient sampling from low income residences in Klang Valley. Respondents were interviewed to obtain data on sociodemography, dietary intake and total ulam intake and also measured for anthropometric parameters at respective community centres. Cognitive status was measured using Digit Span (attention and working memory), Rey auditory verbal learning test (RAVLT) (verbal memory) and comprehensive trail making test (CTMT) (cognitive flexibility). The average ulam intake by the respondents was 15.1 ± 8.2g/day and the top five highest consumed ulam were petai (68.1%), pucuk paku (62.9%), ulam raja (56.8%), pegaga (54.6%) and kesum (44.7%).There was a significant correlation between ulam intake with Digit Span (r = 0.265, p = 0.006), total immediate recall of RAVLT (r = 0.427, p < 0.001) and CTMT (r = 0.257, p = 0.007). Analysis of multiple regression indicated that total ulam intake was a significant predictor for Digit Span (R2 = 0.152, p < 0.05), RAVLT (R2 = 0.335, p = 0.001) and CTMT (R2 = 0.310, p < 0.001). In conclusion, this study showed that ulam has the potential to protect against cognitive decline, however, randomized control trials should be conducted to determine the efficacy of the ulam as neuroprotective agent.
    Matched MeSH terms: Cognition Disorders
  19. Fulltext Psychosis post corona radiata and lentiform nucleus infarction
    Abdullah KH, Saini SM, Sharip S, Rahman AH
    BMJ Case Rep, 2015 Apr 02;2015.
    PMID: 25837653 DOI: 10.1136/bcr-2014-208954
    Complications of stroke can include neuropsychiatric symptoms. However, post-stroke psychosis is rare. We report a case where an acute presentation of psychosis, depression and fluctuating cognitive impairment in a middle-aged man turned out to be related to a silent brain infarction. The patient had a background of poorly controlled type 2 diabetes mellitus with glycated haemoglobin level of 9.0-11.0%, hypertension and ischaemic heart disease. His CT brain results showed multifocal infarct with hypodensities at bilateral lentiform nucleus and bilateral corona radiata. His strong genetic predisposition of psychosis and a history of brief psychotic disorder with complete remission 3 years prior to the current presentation might possibly contribute to his post-stroke atypical neuropsychiatric presentation, and posed diagnostic challenges. He showed marked improvement with risperidone 6 mg nocte, chlorpromazine 50 mg nocte and fluvoxamine of 200 mg nocte. The need of comprehensive treatments to modify his stroke risk factors was addressed.
    Matched MeSH terms: Cognition Disorders/etiology
  20. Fulltext Psychosis in Parkinson's disease patients
    Abdul Hamid Abdul Rahman, Suriati Mohamed Saini, Ibrahim Abu Samah
    ASEAN Journal of Psychiatry, 2013;14(2):96-102.
    MyJurnal
    The objective of this study is to determine the prevalence and factors associated with psychosis in Parkinson’s disease (PD) patients.
    Method: This is a cross-sectional study of 108 PD patients from neurological clinic UKM Medical Centre and Kuala Lumpur Hospital. The patients were recruited from August to December 2004. Psychosis was determined using SCID, the severity of psychosis was rated using BPRS. The cognitive functions were evaluated with MMSE and the severity of depression was assessed with HAM-D.
    Results: The result shows that the prevalence of psychosis in Parkinson's disease patients in this sample was 13%. The psychosis was found to be significantly associated with advancing age, duration of illness, severity of depression and cognitive impairment. Multivariate analysis demonstrates that severity of depression (OR = 1.08, 95% C.I. = 1.01 - 1.16) and advancing age (OR = 4.72, 95% C.I. = 1.37 - 16.29) increased risk of psychosis in PD patients.
    Conclusion: We found that advancing age and severity of depression increase risk to develop psychosis in patients with PD.

    Study site: neurological clinic UKM Medical Centre and Kuala Lumpur Hospita
    Matched MeSH terms: Cognition Disorders
Related Terms
Filters
Contact Us

Please provide feedback to Administrator (afdal@afpm.org.my)

External Links