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https://www.readbyqxmd.com/read/28089766/males-with-mecp2-c-terminal-related-atypical-rett-syndromes-and-their-carrier-mothers
#1
Gabriel M Ronen, Lauren I Brady, Mark A Tarnopolsky
BACKGROUND: This communication examines the expanding phenotypes of the MECP2 C-terminal atypical Rett syndromes in males and their affected carrier mothers. DESCRIPTIONS: We describe three males with normal karyotypes who presented with congenital evolving complex neurodevelopmental encephalopathies with multifaceted symptomatology of hypotonia, epilepsy, ataxia, spasticity, movement disorders, behavioral issues, severe intellectual impairment, and communication skills, and a protracted regression phase followed by stabilization...
October 25, 2016: Pediatric Neurology
https://www.readbyqxmd.com/read/28077020/relationship-between-18-f-flutemetamol-uptake-and-rbans-performance-in-non-demented-community-dwelling-older-adults
#2
Dustin B Hammers, Taylor J Atkinson, Bonnie C A Dalley, Kayla R Suhrie, Britney E Beardmore, Lance D Burrell, Kevin P Horn, Kelli M Rasmussen, Norman L Foster, Kevin Duff, John M Hoffman
OBJECTIVE: The Repeatable Battery for the Assessment of Neuropsychological Status (RBANS) has been used extensively for clinical care and in research for patients with mild cognitive impairment and Alzheimer's disease (AD); however, relatively few studies have evaluated the relationship between RBANS performance and AD imaging biomarkers. The purpose of the current study was to evaluate the association between a relatively new amyloid positron emission tomography imaging biomarker and performance on the RBANS...
January 12, 2017: Clinical Neuropsychologist
https://www.readbyqxmd.com/read/28074926/disrupted-global-metastability-and-static-and-dynamic-brain-connectivity-across-individuals-in-the-alzheimer-s-disease-continuum
#3
Aldo Córdova-Palomera, Tobias Kaufmann, Karin Persson, Dag Alnæs, Nhat Trung Doan, Torgeir Moberget, Martina Jonette Lund, Maria Lage Barca, Andreas Engvig, Anne Brækhus, Knut Engedal, Ole A Andreassen, Geir Selbæk, Lars T Westlye
As findings on the neuropathological and behavioral components of Alzheimer's disease (AD) continue to accrue, converging evidence suggests that macroscale brain functional disruptions may mediate their association. Recent developments on theoretical neuroscience indicate that instantaneous patterns of brain connectivity and metastability may be a key mechanism in neural communication underlying cognitive performance. However, the potential significance of these patterns across the AD spectrum remains virtually unexplored...
January 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28072380/network-functional-connectivity-and-whole-brain-functional-connectomics-to-investigate-cognitive-decline-in-neurodegenerative-conditions
#4
REVIEW
O Dipasquale, Mara Cercignani
Non-invasive mapping of brain functional connectivity (FC) has played a fundamental role in neuroscience, and numerous scientists have been fascinated by its ability to reveal the brain's intricate morphology and functional properties. In recent years, two different techniques have been developed that are able to explore FC in pathophysiological conditions and to provide simple and non-invasive biomarkers for the detection of disease onset, severity and progression. These techniques are independent component analysis, which allows a network-based functional exploration of the brain, and graph theory, which provides a quantitative characterization of the whole-brain FC...
October 2016: Functional Neurology
https://www.readbyqxmd.com/read/28070456/a-simple-rat-model-of-mild-traumatic-brain-injury-a-device-to-reproduce-anatomical-and-neurological-changes-of-mild-traumatic-brain-injury
#5
Ho Jeong Kim, Soo Jeong Han
Mild traumatic brain injury typically involves temporary impairment of neurological function. Previous studies used water pressure or rotational injury for designing the device to make a rat a mild traumatic brain injury model. The objective of this study was to make a simple model of causing mild traumatic brain injury in rats. The device consisted of a free-fall impactor that was targeted onto the rat skull. The weight (175 g) was freely dropped 30 cm to rat's skull bregma. We installed a safety device made of acrylic panel...
2017: PeerJ
https://www.readbyqxmd.com/read/28065844/effects-of-the-chronic-restraint-stress-induced-depression-on-reward-related-learning-in-rats
#6
Pan Xu, Kezhu Wang, Cong Lu, Liming Dong, Yixi Chen, Qiong Wang, Zhe Shi, Yanyan Yang, Shanguang Chen, Xinmin Liu
Chronic mild or unpredictability stress produces a persistent depressive-like state. The main symptoms of depression include weight loss, despair, anhedonia, diminished motivation and mild cognition impairment, which could influence the ability of reward-related learning. In the present study, we aimed to evaluate the effects of chronic restraint stress on the performance of reward-related learning of rats. We used the exposure of repeated restraint stress (6h/day, for 28days) to induce depression-like behavior in rats...
January 5, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/28059789/the-mild-behavioral-impairment-checklist%C3%A2-mbi-c-a-rating-scale-for%C3%A2-neuropsychiatric-symptoms-in%C3%A2-pre-dementia-populations
#7
Zahinoor Ismail, Luis Agüera-Ortiz, Henry Brodaty, Alicja Cieslak, Jeffrey Cummings, Corinne E Fischer, Serge Gauthier, Yonas E Geda, Nathan Herrmann, Jamila Kanji, Krista L Lanctôt, David S Miller, Moyra E Mortby, Chiadi U Onyike, Paul B Rosenberg, Eric E Smith, Gwenn S Smith, David L Sultzer, Constantine Lyketsos
BACKGROUND: Mild behavioral impairment (MBI) is a construct that describes the emergence at ≥50 years of age of sustained and impactful neuropsychiatric symptoms (NPS), as a precursor to cognitive decline and dementia. MBI describes NPS of any severity, which are not captured by traditional psychiatric nosology, persist for at least 6 months, and occur in advance of or in concert with mild cognitive impairment. While the detection and description of MBI has been operationalized in the International Society to Advance Alzheimer's Research and Treatment - Alzheimer's Association (ISTAART-AA) research diagnostic criteria, there is no instrument that accurately reflects MBI as described...
December 3, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28051902/the-clinical-utility-reliability-and-validity-of-the-rivermead-behavioural-memory-test-third-edition-rbmt-3-in-hong-kong-older-adults-with-or-without-cognitive-impairments
#8
K N K Fong, K K L Lee, Z P Y Tsang, J Y H Wan, Y Y Zhang, A F C Lau
This study examined the use of the Hong Kong version of the Rivermead Behavioral Memory Test-Third Edition (RBMT-3) for older adults, and by presenting the optimal cut-off scores for patients with cognitive impairments, and for a group of peers who have functional everyday cognition. Hundred older adults residing in community dwellings were recruited from three non-government organisations and completed the RBMT-3: 29 patients with mild to moderate dementia, 34 persons at risk for MCI, and 37 matched older adults with everyday functional cognition for a healthy control group (NC)...
January 4, 2017: Neuropsychological Rehabilitation
https://www.readbyqxmd.com/read/28050343/brain-insulin-resistance-deteriorates-cognition-by-altering-the-topological-features-of-brain-networks
#9
Fan Su, Hao Shu, Qing Ye, Zan Wang, Chunming Xie, Baoyu Yuan, Zhijun Zhang, Feng Bai
Insulin resistance represents one of the mechanisms underlying the link between type 2 diabetes (T2D) and Alzheimer's disease (AD), and we explored its in vivo neurobiology related to cognition based on a pathway-based genetic association analyses. Eighty-seven mild cognitive impairment (MCIs) subjects and 135 matched controls (HCs) were employed at baseline, and they underwent functional MRI scans, clinical evaluations and exon sequencings of 20 genes related to brain insulin resistance. A longitudinal study for an average of 35 months was performed to assess their cognitive decline over time...
2017: NeuroImage: Clinical
https://www.readbyqxmd.com/read/28035938/dementia-and-pressure-ulcers-is-there-a%C3%A2-close-pathophysiological-interrelation
#10
Efraim Jaul, Oded Meiron
The current theoretical investigation aimed to explore common pathophysiological mechanisms underlying dementia and pressure ulcers (PU). Along with the increased longevity, especially in frail elderly patients, there is a higher rate of functional and cognitive impairment with dementia coinciding with disabilities, immobility resulting in a higher rate of PU. Understanding common etiological paths resulting in pressure ulcers and dementia is likely to produce new treatment strategies that could lead to the prevention of comorbid complications...
December 30, 2016: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/27992071/are-behaviour-problems-in-extremely-low-birth-weight-children-related-to-their-motor-ability
#11
Marcella Danks, Kate Cherry, Yvonne R Burns, Peter H Gray
AIM: Investigate if behaviour problems are independently related to mild motor impairment in 11-13 year old children born preterm with extremely low birth weight (ELBW). METHODS: The cross sectional study included 48 (27 male) non-disabled, otherwise healthy ELBW children (<1000g) and 55 (28 male) term born peers. Parents reported behaviour using the Child Behavior Checklist (CBCL). Children completed the Movement Assessment Battery for Children (Movement ABC)...
December 19, 2016: Acta Paediatrica
https://www.readbyqxmd.com/read/27990134/allocentric-spatial-memory-testing-predicts-conversion-from-mild-cognitive-impairment-to-dementia-an-initial-proof-of-concept-study
#12
Ruth A Wood, Kuven K Moodley, Colin Lever, Ludovico Minati, Dennis Chan
The hippocampus is one of the first regions to exhibit neurodegeneration in Alzheimer's disease (AD), and knowledge of its role in allocentric spatial memory may therefore aid early diagnosis of AD. The 4 Mountains Test (4MT) is a short and easily administered test of spatial memory based on the cognitive map theory of hippocampal function as derived from rodent single cell and behavioral studies. The 4MT has been shown in previous cross-sectional studies to be sensitive and specific for mild cognitive impairment (MCI) due to AD...
2016: Frontiers in Neurology
https://www.readbyqxmd.com/read/27984340/predictors-of-long-term-victimization-after-early-pediatric-traumatic-brain-injury
#13
Anna H Hung, Amy Cassedy, Hanna M Schultz, Keith Owen Yeates, Hudson Gerry Taylor, Terry Stancin, Nicolay Chertkoff Walz, Shari L Wade
OBJECTIVE: Pediatric traumatic brain injuries (TBIs) adversely affect long-term functional and social outcomes. Limited research suggests children with TBI are more likely to be victimized by peers than noninjured children. Deficits in social information processing (SIP), cognitive ability, and executive functioning (EF) may contribute to increased victimization risk. This study examined rates of peer victimization/bullying in children with early TBI compared with children with orthopedic injuries (OIs) and the role of processing speed, executive function (EF), and SIP as mediators of the association of TBI and peer victimization...
January 2017: Journal of Developmental and Behavioral Pediatrics: JDBP
https://www.readbyqxmd.com/read/27976608/network-functional-connectivity-and-whole-brain-functional-connectomics-to-investigate-cognitive-decline-in-neurodegenerative-conditions
#14
O Dipasquale, Mara Cercignani
Non-invasive mapping of brain functional connectivity (FC) has played a fundamental role in neuroscience, and numerous scientists have been fascinated by its ability to reveal the brain's intricate morphology and functional properties. In recent years, two different techniques have been developed that are able to explore FC in pathophysiological conditions and to provide simple and non-invasive biomarkers for the detection of disease onset, severity and progression. These techniques are independent component analysis, which allows a network-based functional exploration of the brain, and graph theory, which provides a quantitative characterization of the whole-brain FC...
December 15, 2016: Functional Neurology
https://www.readbyqxmd.com/read/27936937/driving-in-mild-cognitive-impairment-the-role-of-depressive-symptoms
#15
Ion N Beratis, Nikos Andronas, Dionysia Kontaxopoulou, Stella Fragkiadaki, Dimosthenis Pavlou, John Papatriantafyllou, Alexandra Economou, George Yannis, Sokratis G Papageorgiou
OBJECTIVES: Previous studies indicate a negative association between depression and driving fitness in the general population. Our goal was to cover a gap in the literature and to explore the link between depressive symptoms and driving behavior in individuals with Mild Cognitive Impairment (MCI) through the use of a driving simulator experiment. METHODS: Twenty-four individuals with MCI (Age: Mean = 67.42, SD = 7.13) and 23 cognitively healthy individuals (Age: Mean = 65...
December 12, 2016: Traffic Injury Prevention
https://www.readbyqxmd.com/read/27933285/developmental-profile-and-diagnoses-in-children-presenting-with-motor-stereotypies
#16
Francesco Cardona, Francesca Valente, Daniela Miraglia, Caterina D'Ardia, Valentina Baglioni, Flavia Chiarotti
INTRODUCTION: Motor stereotypies represent a typical example of the difficulty in distinguishing non-clinical behaviors (physiological and transient) from symptoms or among different disorders ["primary stereotypies," associated with autistic spectrum disorder (ASD), intellectual disabilities, genetic syndromes, and sensory impairment]. The aim of this study was to obtain an accurate assessment on the relationship between stereotypies and neurodevelopmental disorders. METHODS: We studied 23 children (3 girls), aged 36-95 months, who requested a consultation due to the persistence or increased severity of motor stereotypies...
2016: Frontiers in Pediatrics
https://www.readbyqxmd.com/read/27923640/the-accumulation-of-brain-injury-leads-to-severe-neuropathological-and-neurobehavioral-changes-after-repetitive-mild-traumatic-brain-injury
#17
Huabin Gao, Zhaoli Han, Ruojing Bai, Shan Huang, Xintong Ge, Fanglian Chen, Ping Lei
Traumatic brain injury (TBI) is a major public health problem with long-term neurobehavioral sequela. The evidences have revealed that TBI is a risk factor for later development of neurodegenerative disease and both the single and repetitive brain injury can lead to the neurodegeneration. But whether the effects of accumulation play an important role in the neurodegenerative disease is still unknown. We utilized the Sprague Dawley (SD) rats to develop the animal models of repetitive mild TBI and single mild TBI in order to detect the neurobehavioral changes...
December 3, 2016: Brain Research
https://www.readbyqxmd.com/read/27922638/enhancing-dopaminergic-signaling-and-histone-acetylation-promotes-long-term-rescue-of-deficient-fear-extinction
#18
N Whittle, V Maurer, C Murphy, J Rainer, D Bindreither, M Hauschild, A Scharinger, M Oberhauser, T Keil, C Brehm, T Valovka, J Striessnig, N Singewald
Extinction-based exposure therapy is used to treat anxiety- and trauma-related disorders; however, there is the need to improve its limited efficacy in individuals with impaired fear extinction learning and to promote greater protection against return-of-fear phenomena. Here, using 129S1/SvImJ mice, which display impaired fear extinction acquisition and extinction consolidation, we revealed that persistent and context-independent rescue of deficient fear extinction in these mice was associated with enhanced expression of dopamine-related genes, such as dopamine D1 (Drd1a) and -D2 (Drd2) receptor genes in the medial prefrontal cortex (mPFC) and amygdala, but not hippocampus...
December 6, 2016: Translational Psychiatry
https://www.readbyqxmd.com/read/27917121/neurochemical-and-neuroanatomical-plasticity-following-memory-training-and-yoga-interventions-in-older-adults-with-mild-cognitive-impairment
#19
Hongyu Yang, Amber M Leaver, Prabha Siddarth, Pattharee Paholpak, Linda Ercoli, Natalie M St Cyr, Harris A Eyre, Katherine L Narr, Dharma S Khalsa, Helen Lavretsky
Behavioral interventions are becoming increasingly popular approaches to ameliorate age-related cognitive decline, but their underlying neurobiological mechanisms and clinical efficiency have not been fully elucidated. The present study explored brain plasticity associated with two behavioral interventions, memory enhancement training (MET) and a mind-body practice (yogic meditation), in healthy seniors with mild cognitive impairment (MCI) using structural magnetic resonance imaging (s-MRI) and proton magnetic resonance spectroscopy ((1)H-MRS)...
2016: Frontiers in Aging Neuroscience
https://www.readbyqxmd.com/read/27916420/potential-involvement-of-jnk1-repression-in-the-hepatic-effect-of-sitagliptin-and-metformin-in-rats-subjected-to-high-fat-diet-and-chronic-mild-distress
#20
Yosra M Magdy, Omnyah A El-Kharashi, Enas S Nabih, Safaa M Shaker, Lobna F Abd-Elaziz, Sawsan Aboul-Fotouh
BACKGROUND: Depression and non-alcoholic steatohepatitis (NASH) are highly co-morbid, and hepatic JNK pathway may be involved in their relation. AIM: To evaluate the impact of depression on NASH through the involvement of JNK1 and to assess the effect of sitagliptin and metformin on hepatic JNK1 expression in both NASH and NASH associated with depression. METHODS: Eight groups of male Wistar rats were used: naïve rats, non-stressed NASH, non-stressed NASH sitagliptin treated, non-stressed NASH metformin treated, stressed, stressed NASH untreated, stressed NASH sitagliptin treated and stressed NASH metformin treated...
January 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
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