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Hippocampal volume

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https://www.readbyqxmd.com/read/29154278/effects-of-physical-exercise-on-alzheimer-s-disease-biomarkers-a-systematic-review-of-intervention-studies
#1
Kristian Steen Frederiksen, Le Gjerum, Gunhild Waldemar, Steen Gregers Hasselbalch
Physical exercise may be an important adjunct to pharmacological treatment of Alzheimer's disease (AD). Animal studies indicate that exercise may be disease modifying through several mechanisms including reduction of AD pathology. We carried out a systematic review of intervention studies of physical exercise with hippocampal volume (on MRI), amyloid-β, total tau, phosphorylated tau in cerebrospinal fluid (CSF), 18F-FDG-PET or amyloid PET as outcome measures in healthy subjects, patients with subjective memory complaints, mild cognitive impairment, or AD...
November 16, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/29153039/higher-anxiety-symptoms-predict-progressive-hippocampal-atrophy-in-the-chronic-stages-of-moderate-to-severe-traumatic-brain-injury
#2
Alex R Terpstra, Todd A Girard, Brenda Colella, Robin E A Green
BACKGROUND: In the chronic stages of moderate-severe traumatic brain injury (TBI), progressive hippocampal volume loss-continuing well after acute neurological insults have resolved-has now been well documented. Previous research in other populations suggests that elevated anxiety symptoms are associated with compromise to the medial temporal lobes. OBJECTIVE: To examine whether higher anxiety symptoms predict greater hippocampal volume loss in moderate-severe TBI...
November 1, 2017: Neurorehabilitation and Neural Repair
https://www.readbyqxmd.com/read/29141793/information-processing-deficits-as-a-driving-force-for-memory-impairment-in-ms-a-cross-sectional-study-of-memory-functions-and-mri-in-early-and-late-stage-ms
#3
Wolfgang Köhler, Martin Fischer, Peter Bublak, Jürgen H Faiss, Frank Hoffmann, Annett Kunkel, Michael Sailer, Matthias Schwab, Erhard Stadler, Uwe K Zettl, Iris-Katharina Penner
BACKGROUND: Memory impairment (MI) is a common symptom of MS. Previous studies were conflicting in respect to the possible existence of early MI and the role of hippocampal atrophy. The objective of this study was to investigate MI and structural MRI correlates in homogenous groups of early and late MS, controlling for a potential information-processing speed (IPS) deficit, and utilizing multiple memory test paradigms. METHODS: 152 individually matched subjects were recruited: early MS (EMS, N = 25, disease duration 1...
November 2017: Multiple Sclerosis and related Disorders
https://www.readbyqxmd.com/read/29138923/hippocampal-caudate-nucleus-interactions-support-exceptional-memory-performance
#4
Nils C J Müller, Boris N Konrad, Nils Kohn, Monica Muñoz-López, Michael Czisch, Guillén Fernández, Martin Dresler
Participants of the annual World Memory Championships regularly demonstrate extraordinary memory feats, such as memorising the order of 52 playing cards in 20 s or 1000 binary digits in 5 min. On a cognitive level, memory athletes use well-known mnemonic strategies, such as the method of loci. However, whether these feats are enabled solely through the use of mnemonic strategies or whether they benefit additionally from optimised neural circuits is still not fully clarified. Investigating 23 leading memory athletes, we found volumes of their right hippocampus and caudate nucleus were stronger correlated with each other compared to matched controls; both these volumes positively correlated with their position in the memory sports world ranking...
November 14, 2017: Brain Structure & Function
https://www.readbyqxmd.com/read/29136250/genetic-overlap-between-schizophrenia-and-volumes-of-hippocampus-putamen-and-intracranial-volume-indicates-shared-molecular-genetic-mechanisms
#5
Olav B Smeland, Yunpeng Wang, Oleksandr Frei, Wen Li, Derrek P Hibar, Barbara Franke, Francesco Bettella, Aree Witoelar, Srdjan Djurovic, Chi-Hua Chen, Paul M Thompson, Anders M Dale, Ole A Andreassen
Schizophrenia (SCZ) is associated with differences in subcortical brain volumes and intracranial volume (ICV). However, little is known about the underlying etiology of these brain alterations. Here, we explored whether brain structure volumes and SCZ share genetic risk factors. Using conditional false discovery rate (FDR) analysis, we integrated genome-wide association study (GWAS) data on SCZ (n = 82315) and GWAS data on 7 subcortical brain volumes and ICV (n = 11840). By conditioning the FDR on overlapping associations, this statistical approach increases power to discover genetic loci...
November 9, 2017: Schizophrenia Bulletin
https://www.readbyqxmd.com/read/29133948/increased-hippocampal-tail-volume-predicts-depression-status-and-remission-to-anti-depressant-medications-in-major-depression
#6
J J Maller, K Broadhouse, A J Rush, E Gordon, S Koslow, S M Grieve
Studies of patients with major depressive disorder (MDD) have consistently reported reduced hippocampal volumes; however, the exact pattern of these volume changes in specific anatomical subfields and their functional significance is unclear. We sought to clarify the relationship between hippocampal tail volumes and (i) a diagnosis of MDD, and (ii) clinical remission to anti-depressant medications (ADMs). Outpatients with nonpsychotic MDD (n=202) based on DSM-IV criteria and a 17-item Hamilton Rating Scale for Depression (HRSD17) score ⩾16 underwent pretreatment magnetic resonance imaging as part of the international Study to Predict Optimized Treatment for Depression (iSPOT-D)...
November 14, 2017: Molecular Psychiatry
https://www.readbyqxmd.com/read/29129202/stress-induced-hippocampal-volume-loss-is-adult-neurogenesis-independent
#7
Sahana Murthy
No abstract text is available yet for this article.
December 15, 2017: Biological Psychiatry
https://www.readbyqxmd.com/read/29128167/a-prospective-evaluation-of-hippocampal-radiation-dose-volume-effects-and-memory-deficits-following-cranial-irradiation
#8
Ting Martin Ma, Jimm Grimm, Riley McIntyre, Heather Anderson-Keightly, Lawrence R Kleinberg, Russell K Hales, Joseph Moore, Tracy Vannorsdall, Kristin J Redmond
BACKGROUND AND PURPOSE: To prospectively evaluate hippocampal radiation dose volume effects and memory decline following cranial irradiation. MATERIAL AND METHODS: Effects of hippocampal radiation over a wide range of doses were investigated by combining data from three prospective studies. In one, adults with small cell lung cancer received hippocampal-avoidance prophylactic cranial irradiation. In the other two, adults with glioblastoma multiforme received neural progenitor cell sparing radiation or no sparing with extra dose delivered to subventricular zone...
November 8, 2017: Radiotherapy and Oncology: Journal of the European Society for Therapeutic Radiology and Oncology
https://www.readbyqxmd.com/read/29126888/single-severe-traumatic-brain-injury-produces-progressive-pathology-with-ongoing-contralateral-white-matter-damage-one-year-after-injury
#9
Francesca Pischiutta, Edoardo Micotti, Jennifer R Hay, Ines Marongiu, Eliana Sammali, Daniele Tolomeo, Gloria Vegliante, Nino Stocchetti, Gianluigi Forloni, Maria-Grazia De Simoni, William Stewart, Elisa R Zanier
There is increasing recognition that traumatic brain injury (TBI) may initiate long-term neurodegenerative processes, particularly chronic traumatic encephalopathy. However, insight into the mechanisms transforming an initial biomechanical injury into a neurodegenerative process remain elusive, partly as a consequence of the paucity of informative pre-clinical models. This study shows the functional, whole brain imaging and neuropathological consequences at up to one year survival from single severe TBI by controlled cortical impact in mice...
November 7, 2017: Experimental Neurology
https://www.readbyqxmd.com/read/29125239/hippocampal-sparing-approach-in-fractionated-stereotactic-brain-vmat-radio-therapy-a-retrospective-feasibility-analysis
#10
Maria Daniela Falco, Stefano Giancaterino, Marco D'Andrea, Ramon Gimenez De Lorenzo, Marianna Trignani, Luciana Caravatta, Clelia Di Carlo, Saide Di Biase, Albina Allajbej, Domenico Genovesi
Volumetric Modulated Arc Therapy (VMAT) techniques for fractioned stereotactic brain radiotherapy (FSBRT) can achieve highly conformal dose distribution to intracranial lesions. However, they can potentially increase the dose to hippocampus (H) causing neurocognitive toxicity during the first four months after irradiation. The purpose of this study was to assess the feasibility of hippocampal-sparing (HS) treatment plans in 22 patients with brain metastasis treated with VMAT technique. Firstly, we retrospectively analyzed hippocampal doses in all 22 VMAT original (not hippocampal-sparing, NHS) plans...
November 10, 2017: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/29118430/inter-individual-variation-in-genes-governing-human-hippocampal-progenitor-differentiation-in-vitro-is-associated-with-hippocampal-volume-in-adulthood
#11
Timothy R Powell, Tytus Murphy, Sang H Lee, Rodrigo R R Duarte, Hyun Ah Lee, Demelza Smeeth, Jack Price, Gerome Breen, Sandrine Thuret
Hippocampal volumes are smaller in psychiatric disorder patients and lower levels of hippocampal neurogenesis are the hypothesized cause. Understanding which molecular processes regulate hippocampal progenitor differentiation might aid in the identification of novel drug targets that can promote larger hippocampal volumes. Here we use a unique human cell line to assay genome-wide expression changes when hippocampal progenitor cells differentiate. RNA was extracted from proliferating cells versus differentiated neural cells and applied to Illumina Human HT-12 v4 Expression BeadChips...
November 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29117260/the-association-of-visual-memory-with-hippocampal-volume
#12
Andrea R Zammit, Ali Ezzati, Mindy J Katz, Molly E Zimmerman, Michael L Lipton, Martin J Sliwinski, Richard B Lipton
BACKGROUND: In this study we investigated the role of hippocampal volume (HV) in visual memory. METHODS: Participants were a subsample of older adults (> = 70 years) from the Einstein Aging Study. Visual performance was measured using the Complex Figure (CF) copy and delayed recall tasks from the Repeatable Battery for the Assessment of Neuropsychological Status. Linear regressions were fitted to study associations between HV and visual tasks. RESULTS: Participants' (n = 113, mean age = 78...
2017: PloS One
https://www.readbyqxmd.com/read/29114732/amyloid-%C3%AE-deposition-and-suspected-non-alzheimer-pathophysiology-and-cognitive-decline-patterns-for-12-years-in-oldest-old-participants-without-dementia
#13
Yujing Zhao, Dana L Tudorascu, Oscar L Lopez, Ann D Cohen, Chester A Mathis, Howard J Aizenstein, Julie C Price, Lewis H Kuller, M Ilyas Kamboh, Steven T DeKosky, William E Klunk, Beth E Snitz
Importance: The prevalence of pathologic conditions of the brain associated with Alzheimer disease increases strongly with age. Little is known about the distribution and clinical significance of preclinical biomarker staging in the oldest old, when most individuals without dementia are likely to have positive biomarkers. Objective: To compare the patterns of long-term cognitive decline in multiple domains by preclinical biomarker status in the oldest old without dementia...
November 6, 2017: JAMA Neurology
https://www.readbyqxmd.com/read/29113943/effect-of-aerobic-exercise-on-hippocampal-volume-in-humans-a-systematic-review-and-meta-analysis
#14
Joseph Firth, Brendon Stubbs, Davy Vancampfort, Felipe Schuch, Jim Lagopoulos, Simon Rosenbaum, Philip B Ward
Hippocampal volume increase in response to aerobic exercise has been consistently observed in animal models. However, the evidence from human studies is equivocal. We undertook a systematic review to identify all controlled trials examining the effect of aerobic exercise on the hippocampal volumes in humans, and applied meta-analytic techniques to determine if aerobic exercise resulted in volumetric increases. We also sought to establish how volume changes differed in relation to unilateral measures of left/right hippocampal volume, and across the lifespan...
November 4, 2017: NeuroImage
https://www.readbyqxmd.com/read/29113931/neurobiological-mechanisms-of-chemotherapy-induced-cognitive-impairment-in-a-transgenic-model-of-breast-cancer
#15
Gordon Winocur, Hal Berman, Mary Nguyen, Malcolm A Binns, Mark Henkelman, Matthijs van Eede, Micheline Piquette-Miller, Melanie J Sekeres, J Martin Wojtowicz, Johnson Yu, Haibo Zhang, Ian F Tannock
Animal studies have reinforced clinical reports of cognitive impairment in cancer survivors following chemotherapy but, until now, all pre-clinical research in this area has been conducted on normal rodents. The present study investigated the effects of chemotherapy on cognition and underlying biological mechanisms in the FVB/N-Tg (MMTV-neu) 202 Mul/J mouse, a well-characterized transgenic model of breast cancer that has similarities to the tumorigenesis which occurs in humans. Tumor-bearing and control mice received three weekly injections of a combination of methotrexate + 5-fluorouracil, or an equal volume of saline...
November 4, 2017: Neuroscience
https://www.readbyqxmd.com/read/29112194/genome-wide-association-study-identifies-a-novel-locus-for-cannabis-dependence
#16
A Agrawal, Y-L Chou, C E Carey, D A A Baranger, B Zhang, R Sherva, L Wetherill, M Kapoor, J-C Wang, S Bertelsen, A P Anokhin, V Hesselbrock, J Kramer, M T Lynskey, J L Meyers, J I Nurnberger, J P Rice, J Tischfield, L J Bierut, L Degenhardt, L A Farrer, J Gelernter, A R Hariri, A C Heath, H R Kranzler, P A F Madden, N G Martin, G W Montgomery, B Porjesz, T Wang, J B Whitfield, H J Edenberg, T Foroud, A M Goate, R Bogdan, E C Nelson
Despite moderate heritability, only one study has identified genome-wide significant loci for cannabis-related phenotypes. We conducted meta-analyses of genome-wide association study data on 2080 cannabis-dependent cases and 6435 cannabis-exposed controls of European descent. A cluster of correlated single-nucleotide polymorphisms (SNPs) in a novel region on chromosome 10 was genome-wide significant (lowest P=1.3E-8). Among the SNPs, rs1409568 showed enrichment for H3K4me1 and H3K427ac marks, suggesting its role as an enhancer in addiction-relevant brain regions, such as the dorsolateral prefrontal cortex and the angular and cingulate gyri...
November 7, 2017: Molecular Psychiatry
https://www.readbyqxmd.com/read/29108528/problematic-alcohol-use-and-hippocampal-volume-in-a-female-sample-disentangling-cause-from-consequence-using-a-co-twin-control-study-design
#17
Sylia Wilson, Stephen M Malone, Ruskin H Hunt, Kathleen M Thomas, William G Iacono
BACKGROUND: Although there is extensive evidence that problematic alcohol use is associated with smaller hippocampal volume, the typical cross-sectional study design cannot determine whether hippocampal deviations reflect pre-existing liability toward problematic alcohol use or instead reflect an alcohol exposure-related effect. We used the co-twin control study design, which capitalizes upon differences within a twin pair in levels of drinking, to differentiate pre-existing liability from an effect of alcohol exposure...
November 7, 2017: Psychological Medicine
https://www.readbyqxmd.com/read/29106439/increased-diastolic-blood-pressure-is-associated-with-mri-biomarkers-of-dementia-related-brain-pathology-in-normative-ageing
#18
Christopher J McNeil, Phyo Kyaw Myint, Anca-Larisa Sandu, John F Potter, Roger Staff, Lawrence J Whalley, Alison D Murray
Background: hypertension is a risk for brain ageing, but the mechanisms underlying this effect remain unclear. Magnetic resonance imaging (MRI) detected biomarkers of brain ageing include white matter hyperintensities (WMHs), a marker of cerebrovascular disease, and hippocampal volume, a marker of Alzheimer's disease pathology. Objective: to examine relationships between blood pressure (BP) components and brain pathology in older adults. Subjects: two hundred and twenty-seven members of the Aberdeen 1936 Birth Cohort between ages 64 and 68 years...
July 4, 2017: Age and Ageing
https://www.readbyqxmd.com/read/29103037/circulating-progenitor-cells-correlate-with-memory-posterior-cortical-thickness-and-hippocampal-perfusion
#19
Daniel A Nation, Alick Tan, Shubir Dutt, Elissa C McIntosh, Belinda Yew, Jean K Ho, Anna E Blanken, Jung Yun Jang, Kathleen E Rodgers, Aimée Gaubert
BACKGROUND: Bone marrow-derived progenitor cells survey the vasculature and home to sites of tissue injury where they can promote repair and regeneration. It has been hypothesized that these cells may play a protective role neurodegenerative and vascular cognitive impairment. OBJECTIVE: To evaluate progenitor cell levels in older adults with and without mild cognitive impairment (MCI), and to relate circulating levels to memory, brain volume, white matter lesion volume, and cerebral perfusion...
November 1, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/29100172/earlier-seizure-onset-and-longer-epilepsy-duration-correlate-with-the-degree-of-temporal-hypometabolism-in-patients-with-mesial-temporal-lobe-sclerosis
#20
Carlos Leiva-Salinas, Mark Quigg, W Jeffrey Elias, James T Patrie, Lucia Flors, Nathan B Fountain, Patrice K Rehm
OBJECTIVE: To study the relationship of glucose metabolism and volume of the temporal lobes with age at epilepsy onset, epilepsy duration, and seizure frequency in patients with mesial temporal sclerosis (MTS). METHODS: We evaluated the pre-surgical (18)F-fluoro-deoxyglucose (FDG) positron emission tomography (PET) and magnetic resonance imaging (MRI) of 18 patients with epilepsy and MRI findings of MTS, who were seizure-free for at least 2-years after temporal lobectomy...
October 28, 2017: Epilepsy Research
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