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https://www.readbyqxmd.com/read/29053832/reward-deficits-in-behavioural-variant-frontotemporal-dementia-include-insensitivity-to-negative-stimuli
#1
David C Perry, Samir Datta, Virginia E Sturm, Kristie A Wood, Jessica Zakrzewski, William W Seeley, Bruce L Miller, Joel H Kramer, Howard J Rosen
During reward processing individuals weigh positive and negative features of a stimulus to determine whether they will pursue or avoid it. Though patients with behavioural variant frontotemporal dementia display changes in their pursuit of rewards, such as food, alcohol, money, and sex, the basis for these shifts is not clearly established. In particular, it is unknown whether patients' behaviour results from excessive focus on rewards, insensitivity to punishment, or to dysfunction in a particular stage of reward processing, such as anticipation, consumption, or action selection...
October 7, 2017: Brain: a Journal of Neurology
https://www.readbyqxmd.com/read/29046472/-surgical-treatment-of-a-giant-olfactory-groove-schwannoma-a-case-report
#2
Takashi Fujii, Naoki Otani, Kazuma Doi, Masataka Miyama, Yohei Otsuka, Takashi Matsumoto, Toru Yoshiura, Satoru Takeuchi, Satoshi Tomura, Arata Tomiyama, Terushige Toyooka, Kojiro Wada, Kentaro Mori
Schwannomas originating from the olfactory nerve are extremely rare because the olfactory nerve does not normally contain Schwann cells. We describe a case of a giant schwannoma of the olfactory groove. A 73-year-old woman presented with anosmia persisting for 10 months. Head computed tomography(CT)for head trauma at another hospital demonstrated a tumor lesion located in the left frontal lobe and paranasal sinus. She had never suffered epilepsy, and past medical history and family history identified no indicators...
October 2017: No Shinkei Geka. Neurological Surgery
https://www.readbyqxmd.com/read/29037336/neuropsychiatry-towards-a-philosophy-of-praxis
#3
Jesús Ramirez-Bermudez, Rodrigo Perez-Esparza, Luis Carlos Aguilar-Venegas, Perminder Sachdev
Neuropsychiatry is a specialized clinical, academic and scientific discipline with its field located in the borderland territory between neurology and psychiatry. In this article, we approach the theoretical definition of neuropsychiatry, and in order to address the practical aspects of the discipline, we describe the profile of a neuropsychiatric liaison service in the setting of a large hospital for neurological diseases in a middle-income country. An audit of consecutive in-patients requiring neuropsychiatric assessment at the National Institute of Neurology and Neurosurgery of Mexico is reported, comprising a total of 1212 patients...
October 2017: Revista Colombiana de Psiquiatría
https://www.readbyqxmd.com/read/29036183/mri-assessed-atrophy-subtypes-in-alzheimer-s-disease-and-the-cognitive-reserve-hypothesis
#4
Karin Persson, Rannveig Sakshaug Eldholm, Maria Lage Barca, Lena Cavallin, Daniel Ferreira, Anne-Brita Knapskog, Geir Selbæk, Anne Brækhus, Ingvild Saltvedt, Eric Westman, Knut Engedal
BACKGROUND/AIMS: MRI assessment of the brain has demonstrated four different patterns of atrophy in patients with Alzheimer's disease dementia (AD): typical AD, limbic-predominant AD, hippocampal-sparing AD, and a subtype with minimal atrophy, previously referred to as no-atrophy AD. The aim of the present study was to identify and describe the differences between these four AD subtypes in a longitudinal memory-clinic study. METHODS: The medial temporal lobes, the frontal regions, and the posterior regions were assessed with MRI visual rating scales to categorize 123 patients with mild AD according to ICD-10 and NINCDS-ADRDA criteria and the clinical dementia rating scale (CDR) into atrophy subtypes...
2017: PloS One
https://www.readbyqxmd.com/read/29029762/thinner-cortex-in-patients-with-subjective-cognitive-decline-is-associated-with-steeper-decline-of-memory
#5
Sander C J Verfaillie, Rosalinde E Slot, Betty M Tijms, Femke Bouwman, Marije R Benedictus, Jozefien M Overbeek, Teddy Koene, Hugo Vrenken, Philip Scheltens, Frederik Barkhof, Wiesje M van der Flier
We aimed to investigate associations between regional cortical thickness and rate of decline over time in 4 cognitive domains in patients with subjective cognitive decline (SCD). We included 233 SCD patients with the total number of 654 neuropsychological assessments (median = 3, range = 2-8) and available baseline magnetic resonance imaging from the Amsterdam Dementia Cohort (125 males, age: 63 ± 9, Mini-Mental State Examination score: 28 ± 2). We assessed longitudinal cognitive functioning at baseline and follow-up in 4 cognitive domains (composite Z-scores): memory, attention, executive function, and language...
September 20, 2017: Neurobiology of Aging
https://www.readbyqxmd.com/read/29023452/functional-imaging-of-cognition-in-an-old-old-population-a-case-for-portable-functional-near-infrared-spectroscopy
#6
Theodore J Huppert, Helmet Karim, Chia-Cheng Lin, Bader A Alqahtani, Susan L Greenspan, Patrick J Sparto
In this study, functional near-infrared spectroscopy (fNIRS) was used to record brain activation during cognitive testing in older individuals (88±6yo; N = 19) living in residential care communities. This population, which is often associated with loss of personal independence due to physical or cognitive decline associated with aging, is also often under-represented in neuroscience research because of a limited means to participate in studies which often take place in large urban or university centers. In this study, we demonstrate the feasibility and initial results using a portable 8-source by 4-detector fNIRS system to measure brain activity from participants within residential care community centers...
2017: PloS One
https://www.readbyqxmd.com/read/28993708/body-mass-index-is-associated-with-cortical-thinning-with-different-patterns-in-mid-and-late-life
#7
M E Shaw, P S Sachdev, W Abhayaratna, K J Anstey, N Cherbuin
OBJECTIVE: High BMI at midlife is associated with increased risk of dementia as well as faster decline in cognitive function. In late-life, however, high BMI has been found to be associated with both increased and decreased dementia risk. The objective of this study was to investigate the neural substrates of this age-related change in BMI risk. METHODS: We measured longitudinal cortical thinning over the whole brain, based on MRI scans for 910 individuals aged 44 to 66 years at baseline...
October 10, 2017: International Journal of Obesity: Journal of the International Association for the Study of Obesity
https://www.readbyqxmd.com/read/28991661/behavioral-and-affective-features-of-amyotrophic-lateral-sclerosis-patients
#8
Yasuyuki Ohta, Kota Sato, Mami Takemoto, Yoshiaki Takahashi, Ryuta Morihara, Yumiko Nakano, Keiichiro Tsunoda, Emi Nomura, Nozomi Hishikawa, Toru Yamashita, Koji Abe
Evaluating the cognitive and behavioral features in amyotrophic lateral sclerosis (ALS) patients is important for therapy and care. Fifty-seven ALS, 5 ALS with the behavioral variant of frontotemporal dementia (FTD) (ALS-FTD), 12 FTD patients, and 35 control subjects were evaluated by 10 different tests for cognitive and behavioral (mini-mental state examination (MMSE), Hasegawa dementia rating scale - revised (HDS-R), frontal assessment battery (FAB), Montreal cognitive assessment (MoCA), ALS-frontotemporal dementia-Questionnaire (ALS-FTD-Q), and anosognosia scale), affective (depression, apathy, and behavioral and psychological symptoms of dementia (BPSD)), and activities of daily living (ADL) assessments...
October 15, 2017: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/28984608/damage-to-the-frontal-aslant-tract-accounts-for-visuo-constructive-deficits-in-alzheimer-s-disease
#9
Laura Serra, Giulia Bechi Gabrielli, Elisa Tuzzi, Barbara Spanò, Giovanni Giulietti, Virginia Failoni, Camillo Marra, Carlo Caltagirone, Giacomo Koch, Mara Cercignani, Marco Bozzali
The frontal aslant tract (FAT) has been described as a bundle connecting the Broca's area to the supplementary motor area (SMA) and the pre-SMA in both hemispheres. The functional properties of this tract and its role in degenerative dementia, such as Alzheimer's disease (AD), still need to be fully clarified. The aim of this study was to explore the microstructural integrity of the FAT in patients with AD and its potential relationship with cognitive functioning. Twenty-three patients with AD and 25 healthy subjects (HS) were enrolled...
2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28984590/disinhibition-in-alzheimer-s-disease-is%C3%A2-associated-with-reduced-right-frontal-pole-cortical-thickness
#10
Elizabeth Finger, Jing Zhang, Bradford Dickerson, Yves Bureau, Mario Masellis
Neuropsychiatric symptoms in Alzheimer's disease are among the most disabling and difficult aspects for caregivers and treating health professionals to manage. Despite the high prevalence of these behaviors, little is known about the factors which lead some patients to develop florid behavioral symptoms while others may progress to severe dementia without such phenomenon. We examined whether regional brain volumes as measured by cortical thickness would predict the presence or absence of disinhibition in patients with Alzheimer's disease...
2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28975068/longitudinal-white-matter-change-in-frontotemporal-dementia-subtypes-and-sporadic-late-onset-alzheimer-s-disease
#11
Fanny M Elahi, Gabe Marx, Yann Cobigo, Adam M Staffaroni, John Kornak, Duygu Tosun, Adam L Boxer, Joel H Kramer, Bruce L Miller, Howard J Rosen
BACKGROUND: Degradation of white matter microstructure has been demonstrated in frontotemporal lobar degeneration (FTLD) and Alzheimer's disease (AD). In preparation for clinical trials, ongoing studies are investigating the utility of longitudinal brain imaging for quantification of disease progression. To date only one study has examined sample size calculations based on longitudinal changes in white matter integrity in FTLD. OBJECTIVE: To quantify longitudinal changes in white matter microstructural integrity in the three canonical subtypes of frontotemporal dementia (FTD) and AD using diffusion tensor imaging (DTI)...
2017: NeuroImage: Clinical
https://www.readbyqxmd.com/read/28973551/region-specific-association-of-subjective-cognitive-decline-with-tauopathy-independent-of-global-%C3%AE-amyloid-burden
#12
Rachel F Buckley, Bernard Hanseeuw, Aaron P Schultz, Patrizia Vannini, Sarah L Aghjayan, Michael J Properzi, Jonathan D Jackson, Elizabeth C Mormino, Dorene M Rentz, Reisa A Sperling, Keith A Johnson, Rebecca E Amariglio
Importance: The ability to explore associations between reports of subjective cognitive decline (SCD) and biomarkers of early Alzheimer disease (AD) pathophysiologic processes (accumulation of neocortical β-amyloid [Aβ] and tau) provides an important opportunity to understand the basis of SCD and AD risk. Objective: To examine associations between SCD and global Aβ and tau burdens in regions of interest in clinically healthy older adults. Design, Setting, and Participants: This imaging substudy of the Harvard Aging Brain Study included 133 clinically healthy older participants (Clinical Dementia Rating Scale global scores of 0) participating in the Harvard Aging Brain Study who underwent cross-sectional flortaucipir F 18 (previously known as AV 1451, T807) positron emission tomography (FTP-PET) imaging for tau and Pittsburgh compound B carbon 11-labeled PET (PiB-PET) imaging for Aβ...
October 2, 2017: JAMA Neurology
https://www.readbyqxmd.com/read/28970540/microstructural-network-alterations-of-olfactory-dysfunction-in-newly-diagnosed-parkinson-s-disease
#13
Ming-Ching Wen, Zheyu Xu, Zhonghao Lu, Ling Ling Chan, Eng King Tan, Louis C S Tan
Olfactory dysfunction is a robust and early sign for Parkinson's disease (PD). Previous studies have revealed its association with dementia and related neural changes in PD. Yet, how olfactory dysfunction affects white matter (WM) microstructure in newly diagnosed and untreated PD remains unclear. Here we comprehensively examined WM features using unbiased whole-brain analyses. 88 newly diagnosed PD patients without dementia (70 with hyposmia and 18 without hyposmia) and 33 healthy controls underwent clinical assessment and diffusion tensor imaging (DTI) scanning...
October 2, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28969373/glymphatic-mri-in-idiopathic-normal-pressure-hydrocephalus
#14
Geir Ringstad, Svein Are Sirirud Vatnehol, Per Kristian Eide
The glymphatic system has in previous studies been shown as fundamental to clearance of waste metabolites from the brain interstitial space, and is proposed to be instrumental in normal ageing and brain pathology such as Alzheimer's disease and brain trauma. Assessment of glymphatic function using magnetic resonance imaging with intrathecal contrast agent as a cerebrospinal fluid tracer has so far been limited to rodents. We aimed to image cerebrospinal fluid flow characteristics and glymphatic function in humans, and applied the methodology in a prospective study of 15 idiopathic normal pressure hydrocephalus patients (mean age 71...
October 1, 2017: Brain: a Journal of Neurology
https://www.readbyqxmd.com/read/28967811/clinical-findings-of-a-probable-case-of-mm2-cortical-type-sporadic-creutzfeldt-jakob-disease-with-antibodies-to-anti-n-terminus-of-%C3%AE-enolase
#15
Yuichi Hayashi, Megumi Yamada, Akio Kimura, Takahiko Asano, Katsuya Satoh, Tetsuyuki Kitamoto, Maokoto Yoneda, Takashi Inuzuka
We report the case of a 76-year-old woman presenting with 47-month history of progressive dementia and cortical blindness with no family history. Antibodies against thyroid glands and the N-terminus of α-enolase (NAE) were detected in her serum. Neurological examination revealed progressive dementia, frontal signs, visual disturbance, and exaggerated bilateral tendon reflexes in both legs. Diffusion MRI showed cortical hyper-intensities in the bilateral occipital and parietal, and the left frontal and temporal cortices...
October 2, 2017: Prion
https://www.readbyqxmd.com/read/28961668/neurobiological-mediators-of-squalor-dwelling-behavior
#16
David A Kahn
Squalor-dwelling behavior has been characterized as living in conditions so unsanitary that feelings of revulsion are elicited among visitors. This behavior is commonly associated with an insensitivity to distress/disgust and a failure to understand the direness of one's living situation, which leads to social isolation and impairment in quality of life. Etiologically, several associations have been described in the literature, including age-related decline, lower socioeconomic status, and rural dwelling status...
September 2017: Journal of Psychiatric Practice
https://www.readbyqxmd.com/read/28961667/neurobiological-mediators-of-squalor-dwelling-behavior
#17
Manan Gupta, Ram J Bishnoi, Jason E Schillerstrom
Squalor-dwelling behavior has been characterized as living in conditions so unsanitary that feelings of revulsion are elicited among visitors. This behavior is commonly associated with an insensitivity to distress/disgust and a failure to understand the direness of one's living situation, which leads to social isolation and impairment in quality of life. Etiologically, several associations have been described in the literature, including age-related decline, lower socioeconomic status, and rural dwelling status...
September 2017: Journal of Psychiatric Practice
https://www.readbyqxmd.com/read/28938336/arterial-stiffness-induced-by-carotid-calcification-leads-to-cerebral-gliosis-mediated-by-oxidative-stress
#18
Nataliya Sadekova, M Florencia Iulita, Diane Vallerand, Gervais Muhire, Mohamed Bourmoum, Audrey Claing, Hélène Girouard
BACKGROUND: Arterial stiffness is a risk factor for cognitive decline and dementia. However, its precise effects on the brain remain unexplored. Using a mouse model of carotid stiffness, we investigated its effect on glial activation and oxidative stress. METHODS: Arterial stiffness was induced by the application of calcium chloride to the adventitial region of the right carotid. Superoxide anion production, NADPH activity and levels, as well as glial activation were examined with immunohistochemical and biochemical approaches, 2-week postcalcification...
September 21, 2017: Journal of Hypertension
https://www.readbyqxmd.com/read/28930751/dementia-predicting-cognitive-risk-score-and-its-correlation-with-cortical-thickness-in-parkinson-disease
#19
Byoung Seok Ye, Seun Jeon, Jee Hyun Ham, Jae Jung Lee, Jong Min Lee, Hye Sun Lee, Phil Hyu Lee, Young H Sohn
BACKGROUND: We developed a risk score system to predict risks of developing dementia in individual Parkinson disease (PD) patients using baseline neuropsychological tests. METHODS: A total of 216 nondemented PD patients underwent a baseline neuropsychological evaluation and were followed up for a mean of 2.7 (±1.1) years. Univariate Cox regression models controlled for age, gender, and education selected neuropsychological tests individually predicting dementia risk...
September 21, 2017: Dementia and Geriatric Cognitive Disorders
https://www.readbyqxmd.com/read/28928015/dendritic-homeostasis-disruption-in-a-novel-frontotemporal-dementia-mouse-model-expressing-cytoplasmic-fused-in-sarcoma
#20
Gen Shiihashi, Daisuke Ito, Itaru Arai, Yuki Kobayashi, Kanehiro Hayashi, Shintaro Otsuka, Kazunori Nakajima, Michisuke Yuzaki, Shigeyoshi Itohara, Norihiro Suzuki
Cytoplasmic aggregation of fused in sarcoma (FUS) is detected in brain regions affected by amyotrophic lateral sclerosis (ALS) and frontotemporal dementia (FTD), which compose the disease spectrum, FUS proteinopathy. To understand the pathomechanism of ALS-FTD-associated FUS, we examined the behavior and cellular properties of an ALS mouse model overexpressing FUS with nuclear localization signal deletion. Mutant FUS transgenic mice showed hyperactivity, social interactional deficits, and impaired fear memory retrieval, all of which are compatible with FTD phenotypes...
September 9, 2017: EBioMedicine
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