Displaying publications 121 - 140 of 275 in total

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  1. Changes in emotional distress, short term memory, and sustained attention following 6 and 12 sessions of progressive muscle relaxation training in 10-11 years old primary school children
    Hashim HA, Zainol NA
    Psychol Health Med, 2015;20(5):623-8.
    PMID: 25603900 DOI: 10.1080/13548506.2014.1002851
    This study compared the effects of 6 and 12 sessions of relaxation training on emotional distress, short-term memory, and sustained attention in primary school children.
    Matched MeSH terms: Memory, Short-Term/physiology*
  2. Effect of semantic coherence on episodic memory processes in schizophrenia
    Battal Merlet L, Morel S, Blanchet A, Lockman H, Kostova M
    Psychiatry Res, 2014 Dec 30;220(3):752-9.
    PMID: 25240943 DOI: 10.1016/j.psychres.2014.08.034
    Schizophrenia is associated with severe episodic retrieval impairment. The aim of this study was to investigate the possibility that schizophrenia patients could improve their familiarity and/or recollection processes by manipulating the semantic coherence of to-be-learned stimuli and using deep encoding. Twelve schizophrenia patients and 12 healthy controls of comparable age, gender, and educational level undertook an associative recognition memory task. The stimuli consisted of pairs of words that were either related or unrelated to a given semantic category. The process dissociation procedure was used to calculate the estimates of familiarity and recollection processes. Both groups showed enhanced memory performances for semantically related words. However, in healthy controls, semantic relatedness led to enhanced recollection, while in schizophrenia patients, it induced enhanced familiarity. The familiarity estimates for related words were comparable in both groups, indicating that familiarity could be used as a compensatory mechanism in schizophrenia patients.
    Matched MeSH terms: Memory, Episodic*
  3. Does exercise habit strength moderate the relationship between emotional distress and short-term memory in Malaysian primary school children?
    Zainol NA, Hashim HA
    Psychol Health Med, 2015;20(4):495-502.
    PMID: 25196807 DOI: 10.1080/13548506.2014.955034
    We examined the moderating effects of exercise habit strength on the relationship between emotional distress and short-term memory in primary school children.
    Matched MeSH terms: Memory, Short-Term*
  4. Learning and memory-enhancing effect of Bacopa monniera in neonatal rats
    Vollala VR, Upadhya S, Nayak S
    Bratisl Lek Listy, 2011;112(12):663-9.
    PMID: 22372329
    The aim of this study was to evaluate the learning and memory-enhancing effect of Bacopa monniera in neonatal rats.
    Matched MeSH terms: Memory/drug effects*
  5. Effect of ascorbic acid on the monosodium glutamate-induced neurobehavioral changes in periadolescent rats
    Narayanan SN, Kumar RS, Paval J, Nayak S
    Bratisl Lek Listy, 2010;111(5):247-52.
    PMID: 20568412
    In the current study we evaluated adverse effects of monosodium glutamate (MSG) on memory formation and its retrieval as well as the role of ascorbic acid (Vitamin-C) in prevention of MSG-induced alteration of neurobehavioral performance in periadolescent rats.
    Matched MeSH terms: Memory/drug effects*
  6. Effects of age and working memory capacity on pitch pattern sequence test and dichotic listening
    Mukari SZ, Umat C, Othman NI
    Audiol. Neurootol., 2010;15(5):303-10.
    PMID: 20150728 DOI: 10.1159/000283007
    This study assessed the effects of age and working memory capacity on dichotic listening and temporal sequencing. Double Dichotic Digit Test (DDT), Pitch Pattern Sequence Test (PPST) and Digit Span Test were administered on 40 healthy adults with hearing thresholds of not greater than 30 dB HL across octave frequencies from 250 to 4000 Hz. Twenty young (20-30 years old) and 20 older (50-65 years old) adults were included in the study. Results showed that the older group had significantly lower scores in DDT, PPST and working memory capacity measures than the young subjects. Working memory capacity was positively correlated with PPST but not with DDT, suggesting that DDT might be more auditory-modality-specific than PPST.
    Matched MeSH terms: Memory, Short-Term/physiology*
  7. Contributions of phonological awareness, phonological short-term memory, and rapid automated naming, toward decoding ability in students with mild intellectual disability
    Soltani A, Roslan S
    Res Dev Disabil, 2013 Mar;34(3):1090-9.
    PMID: 23314249 DOI: 10.1016/j.ridd.2012.12.005
    Reading decoding ability is a fundamental skill to acquire word-specific orthographic information necessary for skilled reading. Decoding ability and its underlying phonological processing skills have been heavily investigated typically among developing students. However, the issue has rarely been noticed among students with intellectual disability who commonly suffer from reading decoding problems. This study is aimed at determining the contributions of phonological awareness, phonological short-term memory, and rapid automated naming, as three well known phonological processing skills, to decoding ability among 60 participants with mild intellectual disability of unspecified origin ranging from 15 to 23 years old. The results of the correlation analysis revealed that all three aspects of phonological processing are significantly correlated with decoding ability. Furthermore, a series of hierarchical regression analysis indicated that after controlling the effect of IQ, phonological awareness, and rapid automated naming are two distinct sources of decoding ability, but phonological short-term memory significantly contributes to decoding ability under the realm of phonological awareness.
    Matched MeSH terms: Memory, Short-Term/physiology
  8. Fulltext P300 correlates with learning & memory abilities and fluid intelligence
    Amin HU, Malik AS, Kamel N, Chooi WT, Hussain M
    J Neuroeng Rehabil, 2015;12:87.
    PMID: 26400233 DOI: 10.1186/s12984-015-0077-6
    Educational psychology research has linked fluid intelligence with learning and memory abilities and neuroimaging studies have specifically associated fluid intelligence with event related potentials (ERPs). The objective of this study is to find the relationship of ERPs with learning and memory recall and predict the memory recall score using P300 (P3) component.
    Matched MeSH terms: Memory/physiology*
  9. Comparative study of trait emotional intelligence and executive functioning among youth
    Alavi M, Mehrinezhad SA, Amini D, Ninggal MT, Latif AA
    J Gen Psychol, 2019 01 07;146(1):50-67.
    PMID: 30612531 DOI: 10.1080/00221309.2018.1535484
    This study investigated the relationship between trait emotional intelligence (TEI) and executive skills (ESs), and the differences between TEI and ESs among Malaysian and Iranian youths. In this study, 226 Malaysians and 248 Iranians completed the TEIQue-SF and Executive Skills Questionnaire. Hypotheses were tested with Partial Least Squares-Structural Equation Modeling (PLS-SEM). Findings indicated that TEI had significant predictions on ESs, depending on cultural contexts. Significant differences were found in the effects of TEI on ESs, including emotional control, metacognition, goal-directed persistence, response inhibition, planning/prioritization, sustained attention, stress tolerance, task initiation, and working memory among Malaysian and Iranian youth. No significant difference was found in the effects of TEI on ESs, including flexibility, organization, and time management across both groups. This study makes a unique contribution to emotional intelligence and executive functioning research literature by considering several ESs at the same time for personal development and promoting healthier lives. Comparison of the effect of TEI on ESs in the Malaysian and Iranian contexts using advanced analysis methods is one of the most important methodological contributions of the study.
    Matched MeSH terms: Memory, Short-Term/physiology*
  10. Peculiarities of innate immune memory in crustaceans
    Low CF, Chong CM
    Fish Shellfish Immunol, 2020 Sep;104:605-612.
    PMID: 32619624 DOI: 10.1016/j.fsi.2020.06.047
    Classical characteristic of the innate immune system is the lack of ability to build up immunological memory, contrast to the adaptive immune system that is capable of "remembering" antigens, and rapidly mount a greater magnitude of immune response upon subsequent exposure to the same antigens. Peculiarly, immunological memory of innate immunity is evidenced in invertebrates. At least three different memory phenomena have been described, namely sustained unique response, recalled response, and immune shift. Studies attended to decipher the mechanistic biology of the innate immune memory reveals the role of epigenetics, which modulates the response of immune memory, and the heritability of immune memory to subsequent generations. A parthenogenetic Artemia model demonstrated successful transgenerational epigenetic inheritance of resistance trait against Vibrio campbellii. Following, the role of invertebrate hemocytes and Down syndrome cell adhesion molecule (Dscam) in innate immune memory is reviewed. While there is no vertebrate antibody homolog found in invertebrates, Dscam was found to resemble the functionality of vertebrate antibody. Insight of Dscam as immune factor was illustrated further in the current review.
    Matched MeSH terms: Immunologic Memory*
  11. Fulltext Enhanced memory in Wistar rats by virgin coconut oil is associated with increased antioxidative, cholinergic activities and reduced oxidative stress
    Rahim NS, Lim SM, Mani V, Abdul Majeed AB, Ramasamy K
    Pharm Biol, 2017 Dec;55(1):825-832.
    PMID: 28118770 DOI: 10.1080/13880209.2017.1280688
    CONTEXT: Virgin coconut oil (VCO) has been reported to possess antioxidative, anti-inflammatory and anti-stress properties.

    OBJECTIVE: Capitalizing on these therapeutic effects, this study investigated for the first time the potential of VCO on memory improvement in vivo.

    MATERIALS AND METHODS: Thirty male Wistar rats (7-8 weeks old) were randomly assigned to five groups (n = six per group). Treatment groups were administered with 1, 5 and 10 g/kg VCO for 31 days by oral gavages. The cognitive function of treated-rats were assessed using the Morris Water Maze Test. Brains were removed, homogenized and subjected to biochemical analyses of acetylcholine (ACh) and acetylcholinesterase (AChE), antioxidants [superoxide dismutase (SOD), catalase (CAT), glutathione (GSH), glutathione peroxidase (GPx) and glutathione reductase (GRx)], lipid peroxidase [malondialdehyde (MDA)] as well as nitric oxide (NO). α-Tocopherol (αT; 150 mg/kg) was also included for comparison purposes.

    RESULTS: VCO-fed Wistar rats exhibited significant (p  33%) and NO (≥ 34%). Overall, memory improvement by VCO was comparable to αT.

    DISCUSSION AND CONCLUSION: VCO has the potential to be used as a memory enhancer, the effect of which was mediated, at least in part, through enhanced cholinergic activity, increased antioxidants level and reduced oxidative stress.

    Matched MeSH terms: Memory/drug effects*
  12. Fulltext Development of clinical pathway for Mild Cognitive Impairment and Dementia to quantify cost of age-related cognitive disorders in Malaysia
    Syed Mohamed Aljunid, Namaitijiang Maimaiti, Zafar Ahmed, Amrizal Muhammad Nur, Norashidah Mohamed Nor, Normazwana Ismail, et al.
    Malaysian Journal of Public Health Medicine, 2014;14(3):0-0.
    MyJurnal
    As the Malaysian population ages, the burden of age-related cognitive disorders such as dementia and Alzheimer’s disease will increase concomitantly. This is one of the sub-study under a research project titled by quantify the cost of age-related cognitive impairment in Malaysia, which was undertaken to develop a clinical pathway for Mild Cognitive Impairment (MCI) and Dementia. The clinical pathway (CP) will be used to support the costing studies of MCI and Dementia. An expert group discussion (EGD) was conducted among selected experts from six (6) government hospitals from different states of Malaysia, Ministry of Health, and United Nations University, International Institute for Global Health, UKM and UPM. The expert group includes psychiatrist specialists and public health medicine specialists. A total of 15 participants took part in the EGD. The group was presented with the different approach in managing MCI and Dementia. Finally, the group came to the consensus agreement on the most appropriate and efficient ways of managing the two conditions. In the EGD, an operational definition for MCI and Dementia was agreed upon and a pathway was developed for the usual practice in the Malaysian health system. A typical case used, as a reference is a 60-year-old patient referred to a memory clinic with complaint of “forgetfulness”. After three outpatient visits in the clinic, the diagnosis of MCI and Dementia could be clinically established. The clinical pathways covered all active clinical and non-clinical management of the patient over a period of one year. The experts identified the additional resources required to manage these patients for the whole spectrum of lifetime based on the expected life expectancy. The Clinical pathway (CP) for MCI and Dementia was successfully developed in EGD with strong support from practitioners in the health system. The findings will help the researchers to identify all-important clinical activities and interventions that will be included in the costing study.
    Matched MeSH terms: Memory; Memory Disorders
  13. Fulltext Working Memory From the Psychological and Neurosciences Perspectives: A Review
    Chai WJ, Abd Hamid AI, Abdullah JM
    Front Psychol, 2018;9:401.
    PMID: 29636715 DOI: 10.3389/fpsyg.2018.00401
    Since the concept of working memory was introduced over 50 years ago, different schools of thought have offered different definitions for working memory based on the various cognitive domains that it encompasses. The general consensus regarding working memory supports the idea that working memory is extensively involved in goal-directed behaviors in which information must be retained and manipulated to ensure successful task execution. Before the emergence of other competing models, the concept of working memory was described by the multicomponent working memory model proposed by Baddeley and Hitch. In the present article, the authors provide an overview of several working memory-relevant studies in order to harmonize the findings of working memory from the neurosciences and psychological standpoints, especially after citing evidence from past studies of healthy, aging, diseased, and/or lesioned brains. In particular, the theoretical framework behind working memory, in which the related domains that are considered to play a part in different frameworks (such as memory's capacity limit and temporary storage) are presented and discussed. From the neuroscience perspective, it has been established that working memory activates the fronto-parietal brain regions, including the prefrontal, cingulate, and parietal cortices. Recent studies have subsequently implicated the roles of subcortical regions (such as the midbrain and cerebellum) in working memory. Aging also appears to have modulatory effects on working memory; age interactions with emotion, caffeine and hormones appear to affect working memory performances at the neurobiological level. Moreover, working memory deficits are apparent in older individuals, who are susceptible to cognitive deterioration. Another younger population with working memory impairment consists of those with mental, developmental, and/or neurological disorders such as major depressive disorder and others. A less coherent and organized neural pattern has been consistently reported in these disadvantaged groups. Working memory of patients with traumatic brain injury was similarly affected and shown to have unusual neural activity (hyper- or hypoactivation) as a general observation. Decoding the underlying neural mechanisms of working memory helps support the current theoretical understandings concerning working memory, and at the same time provides insights into rehabilitation programs that target working memory impairments from neurophysiological or psychological aspects.
    Matched MeSH terms: Memory Disorders; Memory, Short-Term
  14. Memory and time: Backward and forward telescoping in Alzheimer's disease
    El Haj M, Janssen SMJ, Antoine P
    Brain Cogn, 2017 10;117:65-72.
    PMID: 28629646 DOI: 10.1016/j.bandc.2017.06.005
    Backward and forward telescoping are opposite timing biases. The former refers to misattributing events to earlier dates, whereas the latter refers to misattributing events to later dates. The present study investigated both biases in participants with Alzheimer's Disease (AD) and healthy older adults, matched on age, sex, and education level. Participants were asked to recall the years when five remote and five recent public events had occurred. They were also assessed with a cognitive and clinical battery that included a context memory task on which they had to associate letters and locations. Results showed backward telescoping for recent events and forward telescoping for remote events in AD participants and older adults. Furthermore, poorer context recall was observed in AD participants and older adults displaying backward telescoping than in those displaying forward telescoping. These findings suggest an association between the amount of contextual information recalled and the direction of the timing bias. Backward telescoping can be associated with deficiencies in retrieving context characteristics of events, which have been associated with retrograde amnesia and pathological changes to the hippocampus in AD.
    Matched MeSH terms: Memory/physiology*
  15. Probiotic Lactobacillus plantarum P8 alleviated stress and anxiety while enhancing memory and cognition in stressed adults: A randomised, double-blind, placebo-controlled study
    Lew LC, Hor YY, Yusoff NAA, Choi SB, Yusoff MSB, Roslan NS, et al.
    Clin Nutr, 2019 10;38(5):2053-2064.
    PMID: 30266270 DOI: 10.1016/j.clnu.2018.09.010
    BACKGROUND & AIMS: To investigate the effects of probiotic in alleviation of stress in stressed adults, along our focus to identify and justify strain specificity on selected health benefits with a precisely targeted population.

    METHODS: This 12-weeks randomized, double-blind and placebo-controlled study investigated the effects of a probiotic (Lactobacillus plantarum P8; 10 log CFU daily) on psychological, memory and cognition parameters in one hundred and three (P8 n = 52, placebo n = 51) stressed adults with mean age of 31.7 ± 11.1 years old. All subjects fulfilled the criteria of moderate stress upon diagnosis using the PSS-10 questionnaire.

    RESULTS: At the end of study, subjects on P8 showed reduced scores of stress (mean difference 2.94; 95% CI 0.08 to 5.73; P = 0.048), anxiety (mean difference 2.82; 95% CI 0.35 to 5.30; P = 0.031) and total score (mean difference 8.04; 95% CI 0.73 to 15.30; P = 0.041) as compared to placebo after 4-weeks, as assessed by the DASS-42 questionnaire. Although plasma cortisol levels were only marginally different between placebo and P8 (mean difference 3.28 ug/dl; 95% CI -7.09 to 0.52; P = 0.090), pro-inflammatory cytokines such as IFN-γ (mean difference 8.07 pg/ml; 95% CI -11.2 to -4.93; P 

    Matched MeSH terms: Memory/drug effects
  16. Phyllanthus amarus protects against spatial memory impairment induced by lipopolysaccharide in mice
    Alagan A, Jantan I, Kumolosasi E, Azmi N
    Bioinformation, 2019;15(8):535-541.
    PMID: 31719762 DOI: 10.6026/97320630015535
    Phyllanthus amarus Schumach. and Thonn. is a wide spread medicinal herb with various traditional uses. It is well documented for its antioxidant, anti-inflammatory, and hepatoprotective activities. Therefore, it is of interest to evaluate the 80% ethanol extract of Phyllanthus amarus (PA) on spatial memory using the 8-radial arm maze (8-RAM) in mice after induction of neuro inflammation by lipopolysaccharide (LPS) in a 14- and 28-days treatment study. LC-MS/MS was performed to profile the chemical composition in PA extract. Mice were treated orally with 5% v/v tween 20, PA extract (100, 200 and 400 mg/kg), or ibuprofen (IBF 40 mg/kg) for 14 and 28 days. All groups were challenged with LPS (1 mg/kg) via intraperitoneal (i.p.) injection a day prior to the 8-RAM task except for the negative control group which received an i.p. injection of saline. Data obtained were analyzed with one-way ANOVA followed by post hoc Dunnett's test (comparison of all groups against vehicle control). Analysis of LC-MS/MS data revealed the presence of 16 compounds in the PA extract. Administration of PA extract at 200 and 400 mg/kg for 14 and 28 days significantly (*P<0.05) decreased the working and reference memory errors against LPS-induced spatial memory impairment. The observed protective action is possibly due to the putative antineuroinflammatory effects of PA. In conclusion, PA extract possess neuroprotective effects against spatial memory impairment mediated by LPS.
    Matched MeSH terms: Memory Disorders; Spatial Memory
  17. Investigating the mediating role of self-construal on the relationship between cultural group (Malay and Australian) and the characteristics and functional use of autobiographical memory
    Jobson L, Whittles N, Tsecoutanis E, Raj S, Yew RY, Haque S
    Memory, 2019 09;27(8):1054-1062.
    PMID: 31104591 DOI: 10.1080/09658211.2019.1619776
    Cultural differences in autobiographical memory characteristics and function have often been presumed to be associated with different cultural beliefs related to the self. The current research aimed to investigate whether self-construal mediated the relationship between cultural group and the characteristics and functional use of autobiographical memory. Caucasian Australians (n = 71) and Malay Malaysians (n = 50) completed an online questionnaire that included the Self-Defining Memory task, the Thinking About Life Experiences Revised Questionnaire and the Self Construal Scale. As expected, the Australian group provided longer, more autonomously oriented, specific memories than the Malay group. However, contrary to our predictions, self-construal did not mediate the relationships between cultural group and memory characteristics. The Malay group reported more frequently using autobiographical memories for self-continuity than the Australian group. Finally, there was support for an indirect pathway between cultural group and use of autobiographical memories for self-continuity and social-bonding through self-construal (i.e. independent self relative to interdependent self). The findings highlight the importance of explicitly examining values assumed to be associated with autobiographical remembering, and relating these values to memory characteristics and function.
    Matched MeSH terms: Memory, Episodic*
  18. Effects of white noise on word recall performance and brain activity in healthy adolescents with normal and low auditory working memory
    Othman E, Yusoff AN, Mohamad M, Abdul Manan H, Abd Hamid AI, Giampietro V
    Exp Brain Res, 2020 Apr;238(4):945-956.
    PMID: 32179941 DOI: 10.1007/s00221-020-05765-3
    The present study examined the impact of white noise on word recall performance and brain activity in 40 healthy adolescents, split in two groups (normal and low) depending on their auditory working memory capacity (AWMC). Using functional magnetic resonance imaging, participants performed a backward recall task under four different signal-to-noise ratio (SNR) conditions: 15, 10, 5, and 0-dB SNR. Behaviorally, normal AWMC individuals scored significantly higher than low AWMC individuals across noise levels. Whole-brain analyses showed brain activation not to be statistically different between groups across noise levels. In the normal group, a significant positive relationship was found between performance and number of activated voxels in the right superior frontal gyrus. In the low group, significant positive correlations were found between performance and number of activated voxels in left superior frontal gyrus, left inferior frontal gyrus, and left anterior cingulate cortex. These findings suggest that the strategic structure involved in the enhancement of AWM performance may differ in normal and low AWMC individuals.
    Matched MeSH terms: Memory, Short-Term/physiology*
  19. Tualang honey consumption enhanced hippocampal pyramidal count and spatial memory performance of adult male rats
    Mohd Amiruddin Kamarulzaidi, Zulkifli Mohd. Yusoff MY, Abdul Majid Mohamed, Durriyyah Sharifah Hasan Adli
    Sains Malaysiana, 2016;45:215-220.
    As a natural anti-oxidant source, Tualang honey, produced by wild bees nesting on the Tualang tree (Koompassia excelsa) is expected to have positive influence on health, including memory. This study investigated the effect of Tualang honey on the cell count of memory formation related hippocampal pyramidal neuron and on spatial memory performance (SMP) of rats using the radial arm maze (RAM). Sprague Dawley male rats (n=24), 7-8 weeks old were divided into two groups; experimental group group force-fed 1 mL/100 g body weight with 70% honey (HG); and the control group with 0.9% saline (CG) for 12 weeks. Nissl staining technique (with cresyl violet) was employed for neurohistological analysis of the hippocampal tissue. Six randomly selected rats from each group were used for the neuronal soma counting of pyramidal cell layer CA1, CA3a and CA3c regions. Two-way ANOVA analysis showed positively significant differences between treatment and control groups for SMP comparison of working memory and reference memory components, as well as the number of pyramidal neurons. Hence, this positive effects of Tualang honey, as demonstrated behaviorally and neurohistologically, supported report that Tualang honey could improve memory and deter hippocampal morphological impairments; possibly due to its high anti-oxidant properties.
    Matched MeSH terms: Memory, Short-Term; Spatial Memory
  20. TRPM4 inhibition improves spatial memory impairment and hippocampal long-term potentiation deficit in chronic cerebral hypoperfused rats
    Hazalin NAMN, Liao P, Hassan Z
    Behav Brain Res, 2020 09 01;393:112781.
    PMID: 32619565 DOI: 10.1016/j.bbr.2020.112781
    Chronic cerebral hypoperfusion (CCH) been well characterized as a common pathological status contributing to neurodegenerative diseases such as Alzheimer's disease and vascular dementia. CCH is an important factor that leads to cognitive impairment, but the underlying neurobiological mechanism is poorly understood and no effective treatment is available. Recently, transient receptor potential melastatin 4 (TRPM4) cation channel has been identified as an important molecular element in focal cerebral ischemia. Over activation of the channel is a major molecular mechanism of oncotic cell death. However, the role of TRPM4 in CCH that propagates global brain hypoxia have not been explored. Therefore, the present study is designed to investigate the effect of TRPM4 inhibition on the cognitive functions of the rats following CCH via permanent bilateral occlusion of common carotid arteries (PBOCCA) model. In this model, treatment with siRNA suppressed TRPM4 expression at both the mRNA and protein levels and improved cognitive deficits of the CCH rats without affecting their motor function. Furthermore, treatment with siRNA rescued the LTP impairment in CCH-induced rats. Consistent with the restored of LTP, western blot analysis revealed that siRNA treatment prevented the reduction of synaptic proteins, including calcium/calmodulin-dependent kinase II alpha (CaMKIIα) and brain-derived neurotrophic factor (BDNF) in brain regions of CCH rats. The present findings provide a novel role of TRPM4 in restricting cognitive functions in CCH and suggest inhibiting TRPM4 may represent a promising therapeutic strategy in targeting ion channels to prevent the progression of cognitive deficits induced by ischemia.
    Matched MeSH terms: Spatial Memory/physiology*
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