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https://www.readbyqxmd.com/read/28633986/gray-matter-abnormalities-in-non-comorbid-medication-naive-patients-with-major-depressive-disorder-or-social-anxiety-disorder
#1
Youjin Zhao, Lizhou Chen, Wenjing Zhang, Yuan Xiao, Chandan Shah, Hongru Zhu, Minlan Yuan, Huaiqiang Sun, Qiang Yue, Zhiyun Jia, Wei Zhang, Weihong Kuang, Qiyong Gong, Su Lui
BACKGROUND: An overlap of clinical symptoms between major depressive disorder (MDD) and social anxiety disorder (SAD) suggests that the two disorders exhibit similar brain mechanisms. However, few studies have directly compared the brain structures of the two disorders. The aim of this study was to assess the gray matter volume (GMV) and cortical thickness alterations between non-comorbid medication-naive MDD patients and SAD patients. METHODS: High-resolution T1-weighted images were acquired from 37 non-comorbid MDD patients, 24 non-comorbid SAD patients and 41 healthy controls (HCs)...
June 15, 2017: EBioMedicine
https://www.readbyqxmd.com/read/28633299/structural-covariance-networks-in-children-with-autism-or-adhd
#2
R A I Bethlehem, R Romero-Garcia, E Mak, E T Bullmore, S Baron-Cohen
Background: While autism and attention-deficit/hyperactivity disorder (ADHD) are considered distinct conditions from a diagnostic perspective, clinically they share some phenotypic features and have high comorbidity. Regardless, most studies have focused on only one condition, with considerable heterogeneity in their results. Taking a dual-condition approach might help elucidate shared and distinct neural characteristics. Method: Graph theory was used to analyse topological properties of structural covariance networks across both conditions and relative to a neurotypical (NT; n = 87) group using data from the ABIDE (autism; n = 62) and ADHD-200 datasets (ADHD; n = 69)...
June 13, 2017: Cerebral Cortex
https://www.readbyqxmd.com/read/28629690/axillary-lymph-node-sonographic-features-and-breast-tumor-characteristics-as-predictors-of-malignancy-a-nomogram-to-predict-risk
#3
Patricia Akissue de Camargo Teixeira, Luciano F Chala, Carlos Shimizu, José R Filassi, Jonathan Y Maesaka, Nestor de Barros
The purpose of this study was to build a mathematical model to predict the probability of axillary lymph node metastasis based on the ultrasonographic features of axillary lymph nodes and the tumor characteristics. We included 74 patients (75 axillae) with invasive breast cancer who underwent axillary ultrasonography ipsilateral to the tumor and fine-needle aspiration of one selected lymph node. Lymph node pathology results from sentinel lymph node biopsy or surgical dissection were correlated with lymph node ultrasonographic data and with the cytologic findings of fine-needle aspiration...
June 16, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28629404/white-matter-lesions-characterise-brain-involvement-in-moderate-to-severe-chronic-obstructive-pulmonary-disease-but-cerebral-atrophy-does-not
#4
Catherine A Spilling, Paul W Jones, James W Dodd, Thomas R Barrick
BACKGROUND: Brain pathology is relatively unexplored in chronic obstructive pulmonary disease (COPD). This study is a comprehensive investigation of grey matter (GM) and white matter (WM) changes and how these relate to disease severity and cognitive function. METHODS: T1-weighted and fluid-attenuated inversion recovery images were acquired for 31 stable COPD patients (FEV1 52.1% pred., PaO2 10.1 kPa) and 24 age, gender-matched controls. T1-weighted images were segmented into GM, WM and cerebrospinal fluid (CSF) tissue classes using a semi-automated procedure optimised for use with this cohort...
June 19, 2017: BMC Pulmonary Medicine
https://www.readbyqxmd.com/read/28627714/migraine-subclassification-via-a-data-driven-automated-approach-using-multimodality-factor-mixture-modeling-of-brain-structure-measurements
#5
Todd J Schwedt, Bing Si, Jing Li, Teresa Wu, Catherine D Chong
BACKGROUND: The current subclassification of migraine is according to headache frequency and aura status. The variability in migraine symptoms, disease course, and response to treatment suggest the presence of additional heterogeneity or subclasses within migraine. OBJECTIVE: The study objective was to subclassify migraine via a data-driven approach, identifying latent factors by jointly exploiting multiple sets of brain structural features obtained via magnetic resonance imaging (MRI)...
June 19, 2017: Headache
https://www.readbyqxmd.com/read/28625674/regional-cerebral-cortical-thickness-correlates-with-autonomic-outflow
#6
REVIEW
Katelyn N Wood, Mark B Badrov, Mark R Speechley, J Kevin Shoemaker
Dysregulation of autonomic control often develops with advancing age, favoring a chronic state of heightened sympathetic outflow with parasympathetic withdrawal. However, the mechanisms of this age-related autonomic impairment are not known. This study tested the hypothesis that inter-individual differences in autonomic outflow across the adult age-span are related to cerebral cortex thickness. A total of 55 healthy, active individuals participated in this study (21-73years; 18 female). Physical fitness was treated as a possible covariate (VO2peak: 26-81mL/kg/min)...
June 7, 2017: Autonomic Neuroscience: Basic & Clinical
https://www.readbyqxmd.com/read/28625224/auditory-verbal-hallucinations-are-related-to-cortical-thinning-in-the-left-middle-temporal-gyrus-of-patients-with-schizophrenia
#7
Y Cui, B Liu, M Song, D M Lipnicki, J Li, S Xie, Y Chen, P Li, L Lu, L Lv, H Wang, H Yan, J Yan, H Zhang, D Zhang, T Jiang
BACKGROUND: Auditory verbal hallucinations (AVHs) are one of the most common and severe symptoms of schizophrenia, but the neuroanatomical abnormalities underlying AVHs are not well understood. The present study aims to investigate whether AVHs are associated with cortical thinning. METHODS: Participants were schizophrenia patients from four centers across China, 115 with AVHs and 93 without AVHs, as well as 261 healthy controls. All received 3 T T1-weighted brain scans, and whole brain vertex-wise cortical thickness was compared across groups...
June 19, 2017: Psychological Medicine
https://www.readbyqxmd.com/read/28624935/eldecalcitol-an-active-vitamin-d3-derivative-prevents-trabecular-bone-loss-and-bone-fragility-in-type-i-diabetic-model-rats
#8
Satoshi Takeda, Mitsuru Saito, Sadaoki Sakai, Kenji Yogo, Keishi Marumo, Koichi Endo
Diabetes mellitus is known to adversely affect the bones and be associated with increased fracture risk. We examined whether eldecalcitol (ELD), an active vitamin D3 derivative, could inhibit the diabetic bone loss in streptozotocin-induced type I diabetic rats. ELD (10, 20, or 40 ng/kg), alfacalcidol (ALF; 25, 50, or 100 ng/kg), or vehicle was administered 5 times per week for 12 weeks from 1 week after diabetes induction. Normal control rats received the vehicle. Bone turnover markers, bone mineral density (BMD), and biomechanical strength of the lumbar spine and femur were measured, and bone histomorphometry was performed...
June 17, 2017: Calcified Tissue International
https://www.readbyqxmd.com/read/28624835/cbct-location-of-the-fusion-between-the-buccal-and-lingual-cortical-in-the-mandibular-ramus-importance-to-sagittal-split-osteotomy
#9
L Scomparin, M-Q-S Soares, C-M-F Rubira, R-Y-F Yaedú, T-S-N Imada, B-S Centurion, E-S Tolentino, J-R-P Lauris, I-R-F Rubira-Bullen
BACKGROUND: Mandibular Sagittal Split Osteotomy (MSSO) is a popular technique in orthognathic surgery used both to advance and to retreat the mandible. However, MSSO may incur in important complications, such as bad splits and sensorineural injuries. Knowing the location of the fusion between the buccal and lingual cortical (FBLC) in the mandibular ramus and the bone thickness in the region where osteotomies will be performed is determinant in MSSO planning to avoid complications. The aim of this study was to document and evaluate possible differences between sexes regarding the location of the FBLC in relation to the superior cortical of mandibular foramen (MF) and bone thickness in the region of interest for MSSO in a Brazilian population...
June 18, 2017: Medicina Oral, Patología Oral y Cirugía Bucal
https://www.readbyqxmd.com/read/28623685/two-stage-ridge-split-at-narrow-alveolar-mandibular-bone-ridges
#10
Ivo Agabiti, Daniele Botticelli
PURPOSE: When the bone ridge is corticalized, the displacement of the buccal plate may result in an unintentional malfracture. The aim of this study was to report the results of a 2-stage atrophic alveolar ridge expansion performed with a sonic-air surgical instrument. MATERIALS AND METHODS: In this retrospective cohort study, the atrophic distal segments of the mandible were treated by a split-thickness flap approach and application of an alveolar ridge expansion performed in 2 surgical phases...
May 24, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28623425/effects-of-a-20-week-high-intensity-strength-and-sprint-training-program-on-tibial-bone-structure-and-strength-in-middle-aged-and-older-male-sprint-athletes-a-randomized-controlled-trial
#11
T H Suominen, M T Korhonen, M Alén, A Heinonen, A Mero, T Törmäkangas, H Suominen
This randomized, controlled, high-intensity strength and sprint training trial in middle-aged and older male sprint athletes showed significant improvements in mid-tibial structure and strength. The study reveals the adaptability of aging bone, suggesting that through a novel, intensive training stimulus it is possible to strengthen bones during aging. INTRODUCTION: High-load, high-speed and impact-type exercise may be an efficient way of improving bone strength even in old age. We evaluated the effects of combined strength and sprint training on indices of bone health in competitive masters athletes, who serve as a group of older people who are likely to be able to participate in vigorous exercise of this kind...
June 16, 2017: Osteoporosis International
https://www.readbyqxmd.com/read/28622353/transmission-electron-microscopic-observation-of-body-cuticle-structures-of-phoretic-and-parasitic-stages-of-parasitaphelenchinae-nematodes
#12
Taisuke Ekino, Toyoshi Yoshiga, Yuko Takeuchi-Kaneko, Natsumi Kanzaki
Using transmission electron microscopy, we examined the body cuticle ultrastructures of phoretic and parasitic stages of the parasitaphelenchid nematodes Bursaphelenchus xylophilus, B. conicaudatus, B. luxuriosae, B. rainulfi; an unidentified Bursaphelenchus species, and an unidentified Parasitaphelenchus species. Nematode body cuticles usually consist of three zones, a cortical zone, a median zone, and a basal zone. The phoretic stages of Bursaphelenchus spp., isolated from the tracheal systems of longhorn beetles or the elytra of bark beetles, have a thick and radially striated basal zone...
2017: PloS One
https://www.readbyqxmd.com/read/28622141/analysis-of-structural-brain-mri-and-multi-parameter-classification-for-alzheimer-s-disease
#13
Yingteng Zhang, Shenquan Liu
Incorporating with machine learning technology, neuroimaging markers which extracted from structural Magnetic Resonance Images (sMRI), can help distinguish Alzheimer's Disease (AD) patients from Healthy Controls (HC). In the present study, we aim to investigate differences in atrophic regions between HC and AD and apply machine learning methods to classify these two groups. T1-weighted sMRI scans of 158 patients with AD and 145 age-matched HC were acquired from the ADNI database. Five kinds of parameters (i...
June 15, 2017: Biomedizinische Technik. Biomedical Engineering
https://www.readbyqxmd.com/read/28620297/racial-differences-in-insular-connectivity-and-thickness-and-related-cognitive-impairment-in-hypertension
#14
Ganesh B Chand, Junjie Wu, Deqiang Qiu, Ihab Hajjar
Hypertensive African-Americans have a greater risk of cognitive impairment than hypertensive Caucasian-Americans. The neural basis of this increased risk is yet unknown. Neuroimaging investigations suggest that the normal neural activity comprises complex interactions between brain networks. Recent studies consistently demonstrate that the insula, part of the salience network, provides modulation effects (information flow) over the default-mode and central-executive networks in cognitively normal subjects, and argue that the modulation effect is declined in cognitive impairment...
2017: Frontiers in Aging Neuroscience
https://www.readbyqxmd.com/read/28618770/clinical-significance-of-renal-cortical-thickness-in-patients-with-chronic-kidney-disease
#15
Mehmet Korkmaz, Bekir Aras, Serkan Güneyli, Mümtaz Yılmaz
Purpose: The aim of this study was to evaluate the correlations between laboratory findings and ultrasonographic measurements of renal length and cortical thickness in patients receiving follow-up for chronic kidney disease (CKD). Methods: CKD patients with a low glomerular filtration rate who did not require renal replacement therapy were included in this prospective study. Patients were followed up with laboratory assays at bimonthly intervals and with ultrasonography performed twice a year...
May 6, 2017: Ultrasonography
https://www.readbyqxmd.com/read/28616383/multiparametric-mri-to-distinguish-early-onset-alzheimer-s-disease-and-behavioural-variant-of-frontotemporal-dementia
#16
Elisa Canu, Federica Agosta, Gorana Mandic-Stojmenovic, Tanja Stojković, Elka Stefanova, Alberto Inuggi, Francesca Imperiale, Massimiliano Copetti, Vladimir S Kostic, Massimo Filippi
This prospective study explored whether an approach combining structural [cortical thickness and white matter (WM) microstructure] and resting state functional MRI can aid differentiation between 62 early onset Alzheimer's disease (EOAD) and 27 behavioural variant of frontotemporal dementia (bvFTD) patients. Random forest and receiver operator characteristic curve analyses assessed the ability of MRI in classifying the two clinical syndromes. All patients showed a distributed pattern of brain alterations relative to controls...
2017: NeuroImage: Clinical
https://www.readbyqxmd.com/read/28612661/is-there-an-association-between-mismatch-negativity-and-cortical-thickness-in-schizophrenia-patients
#17
Jiyoon J Seol, Minah Kim, Kwang Hyuk Lee, Ji-Won Hur, Kang Ik K Cho, Tae Young Lee, Chun Kee Chung, Jun Soo Kwon
INTRODUCTION: Mismatch negativity (MMN) is thought to reflect preattentive, automatic auditory processing. Reduced MMN amplitude is among the most robust findings in schizophrenia research. MMN generators have been shown to be located in the temporal and frontal cortices, which are key areas in the pathophysiology of schizophrenia. This study investigated whether frontotemporal cortical thickness was associated with reduced MMN current source density (CSD) strength in patients with schizophrenia...
June 1, 2017: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://www.readbyqxmd.com/read/28608653/complementary-cortical-gray-and-white-matter-developmental-patterns-in-healthy-preterm-neonates
#18
Vidya Rajagopalan, Julia A Scott, Mengyuan Liu, Kenneth Poskitt, Vann Chau, Steven Miller, Colin Studholme
Preterm birth is associated with brain injury and altered cognitive development. However, the consequences of extrauterine development are not clearly distinguished from perinatal brain injury. Therefore, we characterized cortical growth patterns from 30 to 46 postmenstrual weeks (PMW) in 27 preterm neonates (25-32 PMW at birth) without detectable brain injury on magnetic resonance imaging. We introduce surface-based morphometric descriptors that quantify radial (thickness) and tangential (area) change rates...
June 13, 2017: Human Brain Mapping
https://www.readbyqxmd.com/read/28603900/mitochondrial-point-mutation-m-3243a%C3%A2-%C3%A2-g-associates-with-lower-bone-mineral-density-thinner-cortices-and-reduced-bone-strength-a-case-control-study
#19
Jakob Høgild Langdahl, Anja Lisbeth Frederiksen, Stinus Jørn Hansen, Per Heden Andersen, Knud Bonnet Yderstraede, Morten Dunø, John Vissing, Morten Frost
Mitochondrial dysfunction is associated with several clinical manifestations including diabetes, neurological disorders, renal and hepatic diseases and myopathy. While mitochondrial dysfunction is associated with increased bone resorption and decreased bone formation in mouse models, effects of alterations in mitochondrial function on bone remodelling and mass have not been investigated in humans. We recruited 45 carriers (29 females, 16 males) with the m.3243A > G mutation and healthy controls matched for gender, age, height and menopausal status...
June 11, 2017: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
https://www.readbyqxmd.com/read/28603479/mri-analysis-of-white-matter-myelin-water-content-in-multiple-sclerosis-a-novel-approach-applied-to-finding-correlates-of-cortical-thinning
#20
Michael Dayan, Sandra M Hurtado Rúa, Elizabeth Monohan, Kyoko Fujimoto, Sneha Pandya, Eve M LoCastro, Tim Vartanian, Thanh D Nguyen, Ashish Raj, Susan A Gauthier
A novel lesion-mask free method based on a gamma mixture model was applied to myelin water fraction (MWF) maps to estimate the association between cortical thickness and myelin content, and how it differs between relapsing-remitting (RRMS) and secondary-progressive multiple sclerosis (SPMS) groups (135 and 23 patients, respectively). It was compared to an approach based on lesion masks. The gamma mixture distribution of whole brain, white matter (WM) MWF was characterized with three variables: the mode (most frequent value) m1 of the gamma component shown to relate to lesion, the mode m2 of the component shown to be associated with normal appearing (NA) WM, and the mixing ratio (λ) between the two distributions...
2017: Frontiers in Neuroscience
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