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Occipital lobe function

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https://www.readbyqxmd.com/read/29137644/functional-resonance-magnetic-imaging-fmri-in-adolescents-with-idiopathic-musculoskeletal-pain-a-paradigm-of-experimental-pain
#1
Juliana Molina, Edson Amaro, Liana Guerra Sanches da Rocha, Liliana Jorge, Flavia Heloisa Santos, Claudio A Len
BACKGROUND: Studies on functional magnetic resonance imaging (fMRI) have shown that adults with musculoskeletal pain syndromes tolerate smaller amount of pressure (pain) as well as differences in brain activation patterns in areas related to pain.The objective of this study was to evaluate, through fMRI, the brain activation in adolescents with idiopathic musculoskeletal pain (IMP) while performing an experimental paradigm of pain. METHODS: The study included 10 consecutive adolescents with idiopathic musculoskeletal pain (average age 16...
November 14, 2017: Pediatric Rheumatology Online Journal
https://www.readbyqxmd.com/read/29123400/comparison-of-spontaneous-brain-activity-revealed-by-regional-homogeneity-in-aqp4-igg-neuromyelitis-optica-optic-neuritis-versus-mog-igg-optic-neuritis-patients-a-resting-state-functional-mri-study
#2
Junqing Wang, Yuan Tian, Yi Shao, Hui Feng, Limin Qin, Weiwei Xu, Hongjuan Liu, Quangang Xu, Shihui Wei, Lin Ma
Objective: Many previous studies have demonstrated that neuromyelitis optica (NMO) patients have abnormalities of brain anatomy and function. However, differences in spontaneous brain activity between myelin oligodendrocyte glycoprotein (MOG)-IgG ON and aquaporin 4(AQP4)-neuromyelitis optica-optic neuritis (ON) remain unknown. In the current study, we investigated the brain neural homogeneity in MOG-IgG ON versus AQP4-IgG NMO-ON subjects by regional homogeneity (ReHo) method using magnetic resonance imaging (MRI)...
2017: Neuropsychiatric Disease and Treatment
https://www.readbyqxmd.com/read/29100305/cerebral-blood-flow-changes-in-remitted-early-and-late-onset-depression-patients
#3
Wenxiang Liao, Ze Wang, Xiangrong Zhang, Hao Shu, Zan Wang, Duan Liu, Zhijun Zhang
Abnormal cerebral blood flow (CBF) is reportedly associated with major depressive disorder (MDD). We have investigated CBF changes in early-onset depression (EOD) and late-onset depression (LOD), and their impact on cognitive function. Thirty-two remitted EOD patients, 32 remitted LOD patients, and 43 age-matched healthy controls were recruited, and the pulsed arterial spin labeling data were scanned under 3.0T MRI and processed through voxel-by-voxel statistical analysis. Compared to healthy controls, LOD patients had decreased normalized CBF in the bilateral precuneus, cuneus, right fronto-cingulate-striatal areas, and right temporal, occipital and parietal lobes, but increased normalized CBF in the left frontal and temporal cortices and the cingulate gyrus...
September 29, 2017: Oncotarget
https://www.readbyqxmd.com/read/29099292/cerebral-metabolism-and-vascular-reactivity-during-breath-hold-and-hypoxic-challenge-in-freedivers-and-healthy-controls
#4
Mark B Vestergaard, Henrik Bw Larsson
The goal of the present study was to examine the cerebral metabolism and vascular reactivity during extended breath-holds (ranging from 2 min 32 s to 7 min 0 s) and during a hypoxic challenge in freedivers and non-diver controls. Magnetic resonance imaging was used to measure the global cerebral blood flow (CBF) and metabolic rate of oxygen (CMRO2), and magnetic resonance spectroscopy was used to measure the cerebral lactate, glutamate+glutamine, N-acetylaspartate and phosphocreatine+creatine concentrations in the occipital lobe...
January 1, 2017: Journal of Cerebral Blood Flow and Metabolism
https://www.readbyqxmd.com/read/29082505/long-term-effect-of-intensive-lifestyle-intervention-on-cerebral-blood-flow
#5
Mark A Espeland, Jose A Luchsinger, Rebecca H Neiberg, Owen Carmichael, Paul J Laurienti, Xavier Pi-Sunyer, Rena R Wing, Delilah Cook, Edward Horton, Ramon Casanova, Kirk Erickson, R Nick Bryan
OBJECTIVES: To determine whether long-term behavioral intervention targeting weight loss through increased physical activity and reduced caloric intake would alter cerebral blood flow (CBF) in individuals with type 2 diabetes mellitus. DESIGN: Postrandomization assessment of CBF. SETTING: Action for Health in Diabetes multicenter randomized controlled clinical trial. PARTICIPANTS: Individuals with type 2 diabetes mellitus who were overweight or obese and aged 45 to 76 (N = 310)...
October 30, 2017: Journal of the American Geriatrics Society
https://www.readbyqxmd.com/read/29081148/-follow-up-of-resting-state-brain-function-with-magnetic-resonance-imaging-in-patients-with-type-2-diabetes-mellitus
#6
N Qi, Y Cui, J C Liu, M Yu, G J Teng
Objective: To investigate the changes of resting brain function with time in patients with type 2 diabetes mellitus (T2DM) by using regional homogeneity (ReHo) with resting-state functional magnetic resonance imaging (rs-fMRI). Methods: Multidimensional cognitive function tests and rs-fMRI scans were performed in 21 T2DM patients and 12 healthy controls in 2012 and 2015 respectively.The differences in clinical variables and the ReHo values before and after were measured by paired sample t test, and the correlation between the change of ReHo value and the change of clinical variables was measured by Pearson correlation analysis based on voxel...
October 24, 2017: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/29076788/relationship-between-cortical-resection-and-visual-function-after-occipital-lobe-epilepsy-surgery
#7
Won Heo, June Sic Kim, Chun Kee Chung, Sang Kun Lee
OBJECTIVE In this study, the authors investigated long-term clinical and visual outcomes of patients after occipital lobe epilepsy (OLE) surgery and analyzed the relationship between visual cortical resection and visual function after OLE surgery. METHODS A total of 42 consecutive patients who were diagnosed with OLE and underwent occipital lobe resection between June 1995 and November 2013 were included. Clinical, radiological, and histopathological data were reviewed retrospectively. Seizure outcomes were categorized according to the Engel classification...
October 27, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/29073774/migraine-with-brainstem-aura-why-not-a-cortical-origin
#8
Geneviève Demarquay, Anne Ducros, Alexandra Montavont, François Mauguiere
Background Migraine with brainstem aura is defined as a migraine with aura including at least two of the following symptoms: dysarthria, vertigo, tinnitus, hypacusis, diplopia, ataxia and/or decreased level of consciousness. Aim The aim of this study is to review data coming from clinical observations and functional mapping that support the role of the cerebral cortex in the initiation of brainstem aura symptoms. Results Vertigo can result from a vestibular cortex dysfunction, while tinnitus and hypacusis can originate within the auditory cortex...
January 1, 2017: Cephalalgia: An International Journal of Headache
https://www.readbyqxmd.com/read/29073724/interleaved-31-p-mrs-imaging-of-human-frontal-and-occipital-lobes-using-dual-rf-coils-in-combination-with-single-channel-transmitter-receiver-and-dynamic-b0-shimming
#9
Byeong-Yeul Lee, Xiao-Hong Zhu, Myung Kyun Woo, Gregor Adriany, Scott Schillak, Wei Chen
In vivo (31) P magnetic resonance spectroscopy (MRS) provides a unique tool for the non-invasive study of brain energy metabolism and mitochondrial function. The assessment of bioenergetic impairment in different brain regions is essential to understand the pathophysiology and progression of human brain diseases. This article presents a simple and effective approach which allows the interleaved measurement of (31) P spectra and imaging from two distinct human brain regions of interest with dynamic B0 shimming capability...
October 26, 2017: NMR in Biomedicine
https://www.readbyqxmd.com/read/29072188/body-dysmorphic-disorder-latest-neuroanatomical-and-neuropsychological-findings
#10
K Tasios, I Michopoulos
Body dysmorphic disorder (BDD) is characterized by a preoccupation with a perceived defect or flaw in physical appearance that is not observable or appears slight to others. It leads to severe distress and functional impairment. Cognitive-behavioural and neurobiological similarities to obsessive compulsive disorder (OCD) have led to its newly conceived classification as an obsessive compulsive related disorder (OCRD). In the process of investigating the neurobiology of BDD, neuroimaging and neuropsychological studies have been conducted...
July 2017: Psychiatrikē, Psychiatriki
https://www.readbyqxmd.com/read/29070895/language-lateralization-during-the-chinese-semantic-task-relates-to-the-contralateral-cerebra-cerebellar-interactions-at-rest
#11
Qing Gao, Zhongping Tao, Lintao Cheng, Jinsong Leng, Junping Wang, Chunshui Yu, Huafu Chen
Aiming to investigate whether handedness-related language lateralization is related to the intrinsic resting-state functional connectivity (RSFC) pattern within the language network, the present study integrated the information of functional activations during a semantic task of Chinese characters and FC in resting-state based on functional magnetic resonance imaging (fMRI) data of healthy left handers (LH) and right handers (RH). RSFC was calculated on a voxel-based level between the seed regions chosen from functional activations during the task and the rest of the brain...
October 25, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29062689/occipital-dysembryoplastic-neuroepithelial-tumor-presenting-as-adult-onset-temporal-epilepsy
#12
Riddhi Patira, Cody Nathan, Sarah Zubkov, Camilo Gutierrez, Charles Munyon, Abir Mukherjee, Mercedes Jacobson
Dysembryoplastic neuroepithelial tumor (DNET) is a benign brain tumor which commonly presents as childhood-onset temporal lobe epilepsy (TLE). We present a case of histologically proven DNET with a clinical presentation and scalp EEG suggestive of adult-onset TLE. MRI showed an occipital lesion. PET showed abnormal metabolism of the occipital lesion and the ipsilateral temporal lobe; raising concern for an abnormal functional network reorganization. Intracranial EEG showed interictal spikes and seizures originating from the occipital lesion with no seizures emanating from the temporal lobe...
2017: Epilepsy & Behavior Case Reports
https://www.readbyqxmd.com/read/29060514/gender-differences-in-dynamic-functional-connectivity-based-on-resting-state-fmri
#13
Nini Mao, Hongna Zheng, Zhiying Long, Li Yao, Xia Wu
Many neuroscience studies have found brain differences lead to the gender differences in behavior and cognitive ability. Functional connectivity is a common and effective measure to characterize brain. Most current studies based on fMRI functional connectivity basically assumed temporal stationarity across the duration of scanning, and thought that brain functional connectivity was constant in a certain period of time. However, some studies revealed that the functional connectivity was dynamic and fluctuant over time...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/29056904/early-changes-in-alpha-band-power-and-dmn-bold-activity-in-alzheimer-s-disease-a-simultaneous-resting-state-eeg-fmri-study
#14
Katharina Brueggen, Carmen Fiala, Christoph Berger, Sina Ochmann, Claudio Babiloni, Stefan J Teipel
Simultaneous resting state functional magnetic resonance imaging (rsfMRI)-resting state electroencephalography (rsEEG) studies in healthy adults showed robust positive associations of signal power in the alpha band with BOLD signal in the thalamus, and more heterogeneous associations in cortical default mode network (DMN) regions. Negative associations were found in occipital regions. In Alzheimer's disease (AD), rsfMRI studies revealed a disruption of the DMN, while rsEEG studies consistently reported a reduced power within the alpha band...
2017: Frontiers in Aging Neuroscience
https://www.readbyqxmd.com/read/29046482/blunted-rise-in-brain-glucose-levels-during-hyperglycemia-in-adults-with-obesity-and-t2dm
#15
Janice J Hwang, Lihong Jiang, Muhammad Hamza, Elizabeth Sanchez Rangel, Feng Dai, Renata Belfort-DeAguiar, Lisa Parikh, Brian B Koo, Douglas L Rothman, Graeme Mason, Robert S Sherwin
In rodent models, obesity and hyperglycemia alter cerebral glucose metabolism and glucose transport into the brain, resulting in disordered cerebral function as well as inappropriate responses to homeostatic and hedonic inputs. Whether similar findings are seen in the human brain remains unclear. In this study, 25 participants (9 healthy participants; 10 obese nondiabetic participants; and 6 poorly controlled, insulin- and metformin-treated type 2 diabetes mellitus (T2DM) participants) underwent 1H magnetic resonance spectroscopy scanning in the occipital lobe to measure the change in intracerebral glucose levels during a 2-hour hyperglycemic clamp (glucose ~220 mg/dl)...
October 19, 2017: JCI Insight
https://www.readbyqxmd.com/read/29041878/-influence-of-sympathetic-denervation-of-the-renal-artery-on-the-level-of-arterial-blood-pressure-cerebral-blood-flow-and-cognitive-function-in-patients-with-resistant-arterial-hypertension
#16
Y N Efimova, A V Lichikaki, B Y Lishmanov
PURPOSE: To study the effect of radiofrequency ablation of renal arteries on regional cerebral blood flow and cognitive function in patients with resistant arterial hypertension (AH). MATERIAL AND METHODS: Transcatheter renal denervation (TRD) was performed in 17 patients with resistant AH. Examination before and after TRD included SPECT with mTc-HMPAO, 24-hours blood pressure (BP) monitoring, and comprehensive neuropsychological testing. Fifteen patients without angiographic signs of carotid atherosclerosis, coronary artery disease and AH, neurological and psychiatric disorders were investigated as control group...
July 2017: Kardiologiia
https://www.readbyqxmd.com/read/28993722/type-1-diabetes-and-impaired-awareness-of-hypoglycemia-are-associated-with-reduced-brain-gray-matter-volumes
#17
Petr Bednarik, Amir A Moheet, Heidi Grohn, Anjali F Kumar, Lynn E Eberly, Elizabeth R Seaquist, Silvia Mangia
In this study, we retrospectively analyzed the anatomical MRI data acquired from 52 subjects with type 1 diabetes (26M/26F, 36 ± 11 years old, A1C = 7.2 ± 0.9%) and 50 age, sex and BMI frequency-matched non-diabetic controls (25M/25F, 36 ± 14 years old). The T1D group was further sub-divided based on whether subjects had normal, impaired, or indeterminate awareness of hypoglycemia (n = 31, 20, and 1, respectively). Our goals were to test whether the gray matter (GM) volumes of selected brain regions were associated with diabetes status as well as with the status of hypoglycemia awareness...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28981831/widespread-volumetric-reductions-in-schizophrenia-and-schizoaffective-patients-displaying-compromised-cognitive-abilities
#18
Tamsyn E Van Rheenen, Vanessa Cropley, Andrew Zalesky, Chad Bousman, Ruth Wells, Jason Bruggemann, Suresh Sundram, Danielle Weinberg, Roshel K Lenroot, Avril Pereira, Cynthia Shannon Weickert, Thomas W Weickert, Christos Pantelis
OBJECTIVE: Progress toward understanding brain mechanisms in psychosis is hampered by failures to account for within-group heterogeneity that exists across neuropsychological domains. We recently identified distinct cognitive subgroups that might assist in identifying more biologically meaningful subtypes of psychosis. In the present study, we examined whether underlying structural brain abnormalities differentiate these cognitively derived subgroups. METHOD: 1...
August 21, 2017: Schizophrenia Bulletin
https://www.readbyqxmd.com/read/28965651/altered-functional-connectivity-during-spatial-working-memory-in-children-with-heavy-prenatal-alcohol-exposure
#19
M Alejandra Infante, Eileen M Moore, Amanda Bischoff-Grethe, Susan F Tapert, Sarah N Mattson, Edward P Riley
Individuals prenatally exposed to alcohol often have impaired spatial working memory (SWM). This study examines functional connections of frontal and parietal regions that support SWM in children with and without prenatal alcohol exposure. Children ages 10 to 16 with histories of heavy prenatal alcohol exposure (AE group; n = 18) and controls (CON group; n = 19) underwent functional magnetic resonance imaging (fMRI) while performing a SWM task. Whole brain task-related functional connectivity of bilateral dorsolateral prefrontal cortex (DLPFC) and posterior parietal cortex (PPC) seed regions were estimated for each participant using a psychophysiological interaction approach...
November 2017: Alcohol
https://www.readbyqxmd.com/read/28964628/structural-connectome-alterations-in-prodromal-and-de-novo-parkinson-s-disease-patients
#20
Ming-Ching Wen, Hannah S E Heng, Jung-Lung Hsu, Zheyu Xu, Gerald M Liew, Wing Lok Au, Ling Ling Chan, Louis C S Tan, Eng King Tan
BACKGROUND: Although the clinical signs of prodromal Parkinson's disease (PD) have been identified, little is known about the neural features of the prodromal phase of PD (proPD). The aim of this study was to examine the structural network alterations from healthy aging to proPD and to early PD. METHODS: 181 non-demented and non-depressed participants comprising 55 healthy controls (HCs), 20 proPDs, and 106 de novo PD patients (dPDs) were included in the study and underwent clinical assessment and diffusion tensor imaging scanning...
September 21, 2017: Parkinsonism & related Disorders
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