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https://www.readbyqxmd.com/read/28538517/greater-corticostriatal-activation-associated-with-facial-motor-imagery-compared-with-motor-execution-a-functional-mri-study
#1
Meena M Makary, Seulgi Eun, Kyungmo Park
Motor imagery (MI) relies on conscious mental simulation of a motor act without overt motor output and can promote motor skill acquisition and facilitate rehabilitation for patients with stroke or neurological conditions. Although a plethora of neuroimaging studies have investigated the neural network of MI regarding different body parts, exploration of the neural correlates to facial MI remains warranted. Here, we used functional MRI with a large cohort of 41 participants who underwent motor execution (ME) and MI runs of mouth-stretching tasks...
May 19, 2017: Neuroreport
https://www.readbyqxmd.com/read/28538329/perioperative-care-for-pediatric-patients-with-penetrating-brain-injury-a-review
#2
Marco Mikhael, Elizabeth Frost, Maria Cristancho
Traumatic brain injury (TBI) continues to be the leading cause of death and acquired disability in young children and adolescents, due to blunt or penetrating trauma, the latter being less common but more lethal. Penetrating brain injury (PBI) has not been studied extensively, mainly reported as case reports or case series, due to the assumption that both types of brain injury have common pathophysiology and consequently common management. However, recommendations and guidelines for the management of PBI differ from those of blunt TBI in regards to neuroimaging, intracranial pressure (ICP) monitoring, and surgical management including those pertaining to vascular injury...
May 19, 2017: Journal of Neurosurgical Anesthesiology
https://www.readbyqxmd.com/read/28538088/effects-of-the-insulin-sensitizer-metformin-in-alzheimer-disease-pilot-data-from-a-randomized-placebo-controlled-crossover-study
#3
Aaron M Koenig, Dawn Mechanic-Hamilton, Sharon X Xie, Martha F Combs, Anne R Cappola, Long Xie, John A Detre, David A Wolk, Steven E Arnold
Epidemiological studies have identified a robust association between type II diabetes mellitus and Alzheimer disease (AD), and neurobiological studies have suggested the presence of central nervous system insulin resistance in individuals with AD. Given this association, we hypothesized that the central nervous system-penetrant insulin-sensitizing medication metformin would be beneficial as a disease-modifying and/or symptomatic therapy for AD, and conducted a placebo-controlled crossover study of its effects on cerebrospinal fluid (CSF), neuroimaging, and cognitive biomarkers...
April 2017: Alzheimer Disease and Associated Disorders
https://www.readbyqxmd.com/read/28537985/neuroimaging-in-parkinson-s-disease-focus-on-substantia-nigra-and-nigro-striatal-projection
#4
Daniela Frosini, Mirco Cosottini, Duccio Volterrani, Roberto Ceravolo
PURPOSE OF REVIEW: The diagnosis of Parkinson disease is based on clinical features; however, unmet need is an imaging signature for Parkinson disease and the early differential diagnosis with atypical parkinsonisms. A summary of the molecular imaging and MRI recent evidences for Parkinson disease diagnosis will be presented in this review. RECENT FINDINGS: The nigro-striatal dysfunction explored by dopamine transporter imaging is not a mandatory diagnostic criterion for Parkinson disease, recent evidence supported its utility as in-vivo proof of degenerative parkinsonisms, and there might be compensatory mechanisms leading to an early overestimation...
May 22, 2017: Current Opinion in Neurology
https://www.readbyqxmd.com/read/28534259/the-efficacy-of-orbital-ultrasonography-and-magnetic-resonance-imaging-findings-with-direct-measurement-of-intracranial-pressure-in-distinguishing-papilledema-from-pseudopapilledema
#5
Zeynep Ozturk, Tuba Atalay, Ebru Arhan, Kursad Aydin, Ayse Serdaroglu, Tugba Hirfanoglu, Cengiz Havali, Yilmaz Akbas, Duygu Yalinbas
INTRODUCTION: The goal of this study was to evaluate the utility of orbital ultrasonography and magnetic resonance imaging in the diagnosis of idiopathic intracranial hypertension (IIH). METHOD: We reviewed the medical records of patients referred to our department for suspected IIH. RESULTS: Seven children were diagnosed with IIH. Nine children revealed pseudopapilledema by optic coherence tomography and/or orbital ultrasonography. When the axial sequences were reexamined, patients with papilledema had optic nerve sheath (ONS) enlargement (6...
May 22, 2017: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
https://www.readbyqxmd.com/read/28533994/infective-endocarditis-presenting-as-subarachnoid-hemorrhage-an-appeal-for-caution
#6
Talal Asif, Amena Mohiuddin, Badar Hasan, Amgad Masoud
Spontaneous subarachnoid hemorrhage (SAH) as the presenting feature of infective endocarditis (IE) is rare. It has classically been described in association with the rupture of intracranial mycotic aneurysms (ICMA). Here we describe a very rare case of non-aneurysmal spontaneous SAH in a patient with IE. The patient originally presented with a headache and low-grade fever. Neuroimaging including computed tomography (CT) and magnetic resonance imaging (MRI) of the head revealed SAH. She was eventually diagnosed with streptococcus gallolyticus (formerly streptococcus bovis) IE...
April 19, 2017: Curēus
https://www.readbyqxmd.com/read/28533517/vortioxetine-reduces-bold-signal-during-performance-of-the-n-back-working-memory-task-a-randomised-neuroimaging-trial-in-remitted-depressed-patients-and-healthy-controls
#7
J Smith, M Browning, S Conen, R Smallman, J Buchbjerg, K G Larsen, C K Olsen, S R Christensen, G R Dawson, J F Deakin, P Hawkins, R Morris, G Goodwin, C J Harmer
Cognitive dysfunction is common in depression during both acute episodes and remission. Vortioxetine is a novel multimodal antidepressant that has improved cognitive function including executive function in depressed patients in randomised placebo-controlled clinical trials. However, it is unclear whether vortioxetine is able to target directly the neural circuitry implicated in the cognitive deficits in depression. Remitted depressed (n=48) and healthy volunteers (n=48) were randomised to receive 14 days treatment with 20 mg vortioxetine or placebo in a double-blind design...
May 23, 2017: Molecular Psychiatry
https://www.readbyqxmd.com/read/28533354/teaching-neuroimages-intraspinal-synovial-cyst-causing-brown-s%C3%A3-quard-syndrome-uncommon-cause-of-a-classic-syndrome
#8
Grayson Beecher, Trevor Kotylak, Wendy S Johnston
No abstract text is available yet for this article.
May 23, 2017: Neurology
https://www.readbyqxmd.com/read/28533131/don-t-get-off-the-track
#9
Rod Foroozan, Andrew G Lee
A 43 year-old man noted decreased vision after head trauma, with normal neuroimaging acutely. He had a left homonymous hemianopia, confirmed with hemifield visual evoked potentials, from trauma to the right optic tract. Four months after trauma an MRI of the brain showed atrophy of the right optic tract, and funduscopy revealed optic disc pallor with decreased retinal nerve fiber layer measures consistent with an optic tract syndrome.
May 19, 2017: Survey of Ophthalmology
https://www.readbyqxmd.com/read/28532646/the-novel-psen1-m84v-mutation-associated-to-frontal-dysexecutive-syndrome-spastic-paraparesis-and-cerebellar-atrophy-in-a-dominant-alzheimer-s-disease-family
#10
Maura Gallo, Francesca Frangipane, Chiara Cupidi, Matteo De Bartolo, Sabina Turone, Camilla Ferrari, Benedetta Nacmias, Giuliana Grimaldi, Valentina Laganà, Rosanna Colao, Livia Bernardi, Maria Anfossi, Maria Elena Conidi, Franca Vasso, Sabrina Anna Maria Curcio, Maria Mirabelli, Nicoletta Smirne, Giusi Torchia, Maria Gabriella Muraca, Gianfranco Puccio, Raffaele Di Lorenzo, Maristella Piccininni, Andrea Tedde, Raffaele Giovanni Maletta, Sandro Sorbi, Amalia Cecilia Bruni
We identified the novel PSEN1 pathogenic mutation M84V in 3 patients belonging to a large kindred affected by autosomal dominant Alzheimer's disease (AD). The clinical phenotype was characterized by early onset dementia in 14 affected subjects over 3 generations. Detailed clinical, imaging and genetic assessment was performed. We highlighted the presence of unusual symptoms such as frontal executive syndrome, psychosis and spastic paraparesis in these patients. Spastic paraparesis has been reported in other PSEN1 mutations in adjacent codons, suggesting that the position of the genetic defect may affect the clinical expression, although this phenotype can occur in mutations throughout the whole PSEN1 gene...
April 27, 2017: Neurobiology of Aging
https://www.readbyqxmd.com/read/28531331/diagnostic-challenges-in-meningioma
#11
Martha Nowosielski, Nobert Galldiks, Sarah Iglseder, Philipp Kickingereder, Andreas von Deimling, Martin Bendszus, Wolfgang Wick, Felix Sahm
Advances in molecular profiling and the application of advanced imaging techniques are currently refreshing diagnostic considerations in meningioma patients. Not only technical refinements but also sophisticated histopathological and molecular studies have the potential to overcome some of the challenges during meningioma management. Exact tumor delineation, assessment of tumor growth and pathophysiological parameters were recently addressed by "advanced" magnetic resonance imaging and positron emission tomography...
May 20, 2017: Neuro-oncology
https://www.readbyqxmd.com/read/28530428/short-term-memory-and-long-term-memory-are-still-different
#12
Dennis Norris
A commonly expressed view is that short-term memory (STM) is nothing more than activated long-term memory. If true, this would overturn a central tenet of cognitive psychology-the idea that there are functionally and neurobiologically distinct short- and long-term stores. Here I present an updated case for a separation between short- and long-term stores, focusing on the computational demands placed on any STM system. STM must support memory for previously unencountered information, the storage of multiple tokens of the same type, and variable binding...
May 22, 2017: Psychological Bulletin
https://www.readbyqxmd.com/read/28530001/structured-sparse-low-rank-regression-model-for-brain-wide-and-genome-wide-associations
#13
Xiaofeng Zhu, Heung-Il Suk, Heng Huang, Dinggang Shen
With the advances of neuroimaging techniques and genome sequences understanding, the phenotype and genotype data have been utilized to study the brain diseases (known as imaging genetics). One of the most important topics in image genetics is to discover the genetic basis of phenotypic markers and their associations. In such studies, the linear regression models have been playing an important role by providing interpretable results. However, due to their modeling characteristics, it is limited to effectively utilize inherent information among the phenotypes and genotypes, which are helpful for better understanding their associations...
October 2016: Medical Image Computing and Computer-assisted Intervention: MICCAI ..
https://www.readbyqxmd.com/read/28529878/neuroimaging-in-pre-motor-parkinson-s-disease
#14
REVIEW
Thomas R Barber, Johannes C Klein, Clare E Mackay, Michele T M Hu
The process of neurodegeneration in Parkinson's disease begins long before the onset of clinical motor symptoms, resulting in substantial cell loss by the time a diagnosis can be made. The period between the onset of neurodegeneration and the development of motoric disease would be the ideal time to intervene with disease modifying therapies. This pre-motor phase can last many years, but the lack of a specific clinical phenotype means that objective biomarkers are needed to reliably detect prodromal disease...
2017: NeuroImage: Clinical
https://www.readbyqxmd.com/read/28529875/advanced-magnetic-resonance-imaging-and-neuropsychological-assessment-for-detecting-brain-injury-in-a-prospective-cohort-of-university-amateur-boxers
#15
M G Hart, C R Housden, J Suckling, R Tait, A Young, U Müller, V F J Newcombe, I Jalloh, B Pearson, J Cross, R A Trivedi, J D Pickard, B J Sahakian, P J Hutchinson
BACKGROUND/AIM: The safety of amateur and professional boxing is a contentious issue. We hypothesised that advanced magnetic resonance imaging and neuropsychological testing could provide evidence of acute and early brain injury in amateur boxers. METHODS: We recruited 30 participants from a university amateur boxing club in a prospective cohort study. Magnetic resonance imaging (MRI) and neuropsychological testing was performed at three time points: prior to starting training; within 48 h following a first major competition to detect acute brain injury; and one year follow-up...
2017: NeuroImage: Clinical
https://www.readbyqxmd.com/read/28529691/recent-advances-in-predicting-responses-to-antidepressant-treatment
#16
REVIEW
Thomas Frodl
Major depressive disorder is one of the leading causes of disability in the world since depression is highly frequent and causes a strong burden. In order to reduce the duration of depressive episodes, clinicians would need to choose the most effective therapy for each individual right away. A prerequisite for this would be to have biomarkers at hand that would predict which individual would benefit from which kind of therapy (for example, pharmacotherapy or psychotherapy) or even from which kind of antidepressant class...
2017: F1000Research
https://www.readbyqxmd.com/read/28529059/a-review-of-human-neuroimaging-investigations-involved-with-central-autonomic-regulation-of-baroreflex-mediated-cardiovascular-control
#17
Derek S Kimmerly
Effective regulation of central blood volume and arterial pressure is critical for optimal cardiovascular homeostasis. Inadequate regulation of mean arterial pressure has important pathophysiological implications including syncope, end organ damage, and stroke. Such regulation requires appropriate central integration of barosensory afferents and reflex autonomic control of the heart and blood vessels. The neural pathways involved with the baroreflex include brainstem nuclei that receive modulatory input from higher brain centres...
May 15, 2017: Autonomic Neuroscience: Basic & Clinical
https://www.readbyqxmd.com/read/28529008/role-of-polyunsaturated-fatty-acids-in-human-brain-structure-and-function-across-the-lifespan-an-update-on-neuroimaging-findings
#18
REVIEW
Robert K McNamara, Ruth H Asch, Diana M Lindquist, Robert Krikorian
There is a substantial body of evidence from animal studies implicating polyunsaturated fatty acids (PUFA) in neuroinflammatory, neurotrophic, and neuroprotective processes in brain. However, direct evidence for a role of PUFA in human brain structure and function has been lacking. Over the last decade there has been a notable increase in neuroimaging studies that have investigated the impact of PUFA intake and/or blood levels (i.e., biostatus) on brain structure, function, and pathology in human subjects. The majority of these studies specifically evaluated associations between omega-3 PUFA intake and/or biostatus and neuroimaging outcomes using a variety of experimental designs and imaging techniques...
May 9, 2017: Prostaglandins, Leukotrienes, and Essential Fatty Acids
https://www.readbyqxmd.com/read/28528447/a-single-bout-of-endurance-exercise-modulates-eeg-microstates-temporal-features
#19
Jérôme N Spring, Miralena I Tomescu, Jérôme Barral
Electrical neuroimaging is a promising method to explore the spontaneous brain function after physical exercise. The present study aims to investigate the effect of acute physical exercise on the temporal dynamic of the resting brain activity captured by the four conventional map topographies (microstates) described in the literature, and to associate these brain changes with the post-exercise neuromuscular function. Twenty endurance-trained subjects performed a 30-min biking task at 60% of their maximal aerobic power followed by a 10 km all-out time trial...
May 20, 2017: Brain Topography
https://www.readbyqxmd.com/read/28528357/cerebellar-gray-matter-alterations-in-huntington-disease-a-voxel-based-morphometry-study
#20
Paula C de Azevedo, Rachel P Guimarães, Camila C Piccinin, Luiza G Piovesana, Lidiane S Campos, Juliana R Zuiani, Eliza M Tamashiro, Giordanna Pinheiro, Augusto C Amato-Filho, Fernando Cendes, Iscia Lopes-Cendes, Anelyssa D'Abreu
Neuropathological and neuroimaging studies in Huntington disease (HD) have suggested a role for the cerebellum. Our goal was to perform a detailed evaluation of cerebellar morphology. We performed the Unified HD rating scale (UHDRS) and Montreal cognitive assessment (MOCA) in 26 HD patients and 26 healthy controls. We created a two-sample test to analyze cerebellar gray matter (GM) differences between groups and another to correlate GM alterations with UHDRS and MOCA, corrected for age, expanded cytosine-adenine-guanine repeats, and disease duration using the spatially unbiased atlas template (SUIT)-SPM-toolbox which preserves anatomical detailing...
May 20, 2017: Cerebellum
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