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Advanced Neuroimaging

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https://www.readbyqxmd.com/read/29352027/the-thalamus-in-drug-addiction-from-rodents-to-humans
#1
REVIEW
Anna S Huang, Jameson A Mitchell, Suzanne N Haber, Nelly Alia-Klein, Rita Z Goldstein
Impairments in response inhibition and salience attribution (iRISA) have been proposed to underlie the clinical symptoms of drug addiction as mediated by cortico-striatal-thalamo-cortical networks. The bulk of evidence supporting the iRISA model comes from neuroimaging research that has focused on cortical and striatal influences with less emphasis on the role of the thalamus. Here, we highlight the importance of the thalamus in drug addiction, focusing on animal literature findings on thalamic nuclei in the context of drug-seeking, structural and functional changes of the thalamus as measured by imaging studies in human drug addiction, particularly during drug cue and non-drug reward processing, and response inhibition tasks...
March 19, 2018: Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
https://www.readbyqxmd.com/read/29351243/awake-versus-asleep-deep-brain-stimulation-surgery-technical-considerations-and-critical-review-of-the-literature
#2
REVIEW
Ryan B Kochanski, Sepehr Sani
Advancements in neuroimaging have led to a trend toward direct, image-based targeting under general anesthesia without the use of microelectrode recording (MER) or intraoperative test stimulation, also referred to as "asleep" deep brain stimulation (DBS) surgery. Asleep DBS, utilizing imaging in the form of intraoperative computed tomography (iCT) or magnetic resonance imaging (iMRI), has demonstrated reliable targeting accuracy of DBS leads implanted within the globus pallidus and subthalamic nucleus while also improving clinical outcomes in patients with Parkinson's disease...
January 19, 2018: Brain Sciences
https://www.readbyqxmd.com/read/29350435/from-micro-to-macro-structures-in-multiple-sclerosis-what-is-the-added-value-of-diffusion-imaging
#3
Mara Cercignani, Claudia Gandini Wheeler-Kingshott
Diffusion imaging has been instrumental in understanding damage to the central nervous system as a result of its sensitivity to microstructural changes. Clinical applications of diffusion imaging have grown exponentially over the past couple of decades in many neurological and neurodegenerative diseases, such as multiple sclerosis (MS). For several reasons, MS has been extensively researched using advanced neuroimaging techniques, which makes it an 'example disease' to illustrate the potential of diffusion imaging for clinical applications...
January 19, 2018: NMR in Biomedicine
https://www.readbyqxmd.com/read/29349629/cerebellum-from-development-to-disease-the-8th-international-symposium-of-the-society-for-research-on-the-cerebellum-and-ataxias
#4
EDITORIAL
Hassan Marzban, Mario Manto, Jean Mariani
In recent years, there has been tremendous growth in research on cerebellar motor and non-motor functions. Cerebellum is particularly involved in the spectrum of neurodevelopmental diseases. The 8th International Symposium of the Society for Research on the Cerebellum and Ataxia (SRCA) was held in Winnipeg, Manitoba, (Canada) on May 24-26, 2017. The main theme of the 8th International Symposium was "Development of the Cerebellum and Neurodevelopmental Disorders." Advances in genetics, epigenetic, cerebellar neurogenesis, axonogenesis and gliogenesis, cerebellar developmental disorders including autism spectrum disorders (ASD), neuroimaging, cerebellar ataxias, medulloblastoma, and clinical investigation of cerebellar diseases were presented...
January 18, 2018: Cerebellum
https://www.readbyqxmd.com/read/29344465/grey-and-white-matter-alterations-in-juvenile-myoclonic-epilepsy-a-comprehensive-review
#5
REVIEW
Ji Hyun Kim
Juvenile myoclonic epilepsy (JME) has been classified as a syndrome of idiopathic generalized epilepsy and is characterized by a strong genetic basis, age-specific onset of seizures, specific types of seizures, generalized spike-wave discharges on electroencephalography, and a lack of focal abnormality on magnetic resonance imaging (MRI). Recently, a wide range of advanced neuroimaging techniques have been utilized to elucidate the neuroanatomical substrates and pathophysiological mechanisms underlying JME...
December 2017: Journal of Epilepsy Research
https://www.readbyqxmd.com/read/29344423/age-related-gray-and-white-matter-changes-in-normal-adult-brains
#6
Farnaz Farokhian, Chunlan Yang, Iman Beheshti, Hiroshi Matsuda, Shuicai Wu
Normal aging is associated with both structural changes in many brain regions and functional declines in several cognitive domains with advancing age. Advanced neuroimaging techniques enable explorative analyses of structural alterations that can be used as assessments of such age-related changes. Here we used voxel-based morphometry (VBM) to investigate regional and global brain volume differences among four groups of healthy adults from the IXI Dataset: older females (OF, mean age 68.35 yrs; n=69), older males (OM, 68...
December 2017: Aging and Disease
https://www.readbyqxmd.com/read/29344342/frontotemporal-dementia-latest-evidence-and-clinical-implications
#7
REVIEW
Juan Joseph Young, Mallika Lavakumar, Deena Tampi, Silpa Balachandran, Rajesh R Tampi
Background: Frontotemporal dementia (FTD) describes a cluster of neurocognitive syndromes that present with impairment of executive functioning, changes in behavior, and a decrease in language proficiency. FTD is the second most common form of dementia in those younger than 65 years and is expected to increase in prevalence as the population ages. This goal in our review is to describe advances in the understanding of neurobiological pathology, classification, assessment, and treatment of FTD syndromes...
January 2018: Therapeutic Advances in Psychopharmacology
https://www.readbyqxmd.com/read/29336001/advances-in-the-study-of-the-middle-cranial-fossa-through-cutting-edge-neuroimaging-techniques
#8
Juan A Juanes Méndez, Pablo Ruisoto, Juan C Paniagua, Alberto Prats
The objective of this paper is to present a morphometric study of the middle cranial fossa from the study of 87 patients using cutting edge multislice computed tomography scans (32 detectors) and Magnetic Resonance Imaging. The study presents a detailed anatomical-radiological and morphometric analysis of the middle cranial fossa as well as its neurovascular elements in normal conditions. The implications of this investigation in training and clinical contexts are discussed.
January 16, 2018: Journal of Medical Systems
https://www.readbyqxmd.com/read/29335670/big-data-and-neuroimaging
#9
Yenny Webb-Vargas, Shaojie Chen, Aaron Fisher, Amanda Mejia, Yuting Xu, Ciprian Crainiceanu, Brian Caffo, Martin A Lindquist
Big Data are of increasing importance in a variety of areas, especially in the biosciences. There is an emerging critical need for Big Data tools and methods, because of the potential impact of advancements in these areas. Importantly, statisticians and statistical thinking have a major role to play in creating meaningful progress in this arena. We would like to emphasize this point in this special issue, as it highlights both the dramatic need for statistical input for Big Data analysis and for a greater number of statisticians working on Big Data problems...
December 2017: Statistics in Biosciences
https://www.readbyqxmd.com/read/29332567/nociceptin-orphanin-fq-peptide-nop-receptor-modulators-an-update-in-structure-activity-relationships
#10
Carlo Mustazza, Stefano Pieretti, Francesca Marzoli
Nociceptin /Orphanin FQ Peptide" receptor (NOPr) is a G-protein-coupled receptor with the nociceptin/orphanin FQ peptide (N/OFQ) as endogenous agonist. It is expressed in the nervous system as well as in some non-neural tissues. Its activation has pronociceptive effect at the supraspinal level, whereas at the spinal level it produces nociceptive effects at low doses and antinociceptive effects at higher doses. NOPr is also involved in mood and blood pressure regulation, immunoregulation, airway constriction, feeding, urination, bowel motility, learning and memory...
January 10, 2018: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/29331287/characterizing-the-effects-of-deep-brain-stimulation-with-magnetoencephalography-a-review
#11
REVIEW
Irene E Harmsen, Nathan C Rowland, Richard A Wennberg, Andres M Lozano
BACKGROUND: Deep brain stimulation (DBS) is an important form of neuromodulation that is being applied to patients with motor, mood, or cognitive circuit disorders. Despite the efficacy and widespread use of DBS, the precise mechanisms by which it works remain unknown. Over the last decade, magnetoencephalography (MEG) has become an important functional neuroimaging technique used to study DBS. OBJECTIVE: This review summarizes the literature related to the use of MEG to characterize the effects of DBS...
January 4, 2018: Brain Stimulation
https://www.readbyqxmd.com/read/29321971/processing-and-regulation-of-negative-emotions-in-anorexia-nervosa-an-fmri-study
#12
Maria Seidel, Joseph A King, Franziska Ritschel, Ilka Boehm, Daniel Geisler, Fabio Bernardoni, Matthias Beck, Sophie Pauligk, Ronald Biemann, Alexander Strobel, Thomas Goschke, Henrik Walter, Veit Roessner, Stefan Ehrlich
Theoretical models and recent advances in the treatment of anorexia nervosa (AN) have increasingly focused on the role of alterations in the processing and regulation of emotions. To date, however, our understanding of these changes is still limited and reports of emotional dysregulation in AN have been based largely on self-report data, and there is a relative lack of objective experimental evidence or neurobiological data. The current functional magnetic resonance imaging (fMRI) study investigated the hemodynamic correlates of passive viewing and voluntary downregulation of negative emotions by means of the reappraisal strategy detachment in AN patients...
2018: NeuroImage: Clinical
https://www.readbyqxmd.com/read/29316572/improvement-of-respiratory-depression-in-a-patient-with-primary-medullary-hemorrhage-following-removal-of-hematoma-in-the-half-sitting-position
#13
Shinya Ichimura, Helmut Bertalanffy, Masato Nakaya, Yoichi Mochizuki, Raita Fukaya, Goroku Moriwaki, Masahito Fukuchi, Koji Fujii
Primary medullary hemorrhage is a rare event that may result in ataxic respiration. Although it remains controversial whether primary medullary hemorrhage should be managed conservatively or surgically, recent advancements in neuroimaging and microsurgical techniques have shown promise for improving outcomes and prognosis following surgery. The present report discusses the case of a 70-year-old woman admitted to our institution due to sudden-onset nausea and vomiting. The patient underwent surgical removal of a right medullary hematoma for the treatment of daytime respiratory depression and nocturnal apnea while in the half-sitting position...
January 9, 2018: Journal of Neurological Surgery. Part A, Central European Neurosurgery
https://www.readbyqxmd.com/read/29313802/augmenting-cognitive-training-in-older-adults-the-act-study-design-and-methods-of-a-phase-iii-tdcs-and-cognitive-training-trial
#14
Adam J Woods, Ronald Cohen, Michael Marsiske, Gene E Alexander, Sara J Czaja, Samuel Wu
BACKGROUND: Adults over age 65 represent the fastest growing population in the US. Decline in cognitive abilities is a hallmark of advanced age and is associated with loss of independence and dementia risk. There is a pressing need to develop effective interventions for slowing or reversing the cognitive aging process. While certain forms of cognitive training have shown promise in this area, effects only sometimes transfer to neuropsychological tests within or outside the trained domain...
December 4, 2017: Contemporary Clinical Trials
https://www.readbyqxmd.com/read/29311665/hippocampal-dysfunction-in-the-pathophysiology-of-schizophrenia-a-selective-review-and-hypothesis-for-early-detection-and-intervention
#15
J A Lieberman, R R Girgis, G Brucato, H Moore, F Provenzano, L Kegeles, D Javitt, J Kantrowitz, M M Wall, C M Corcoran, S A Schobel, S A Small
Scientists have long sought to characterize the pathophysiologic basis of schizophrenia and develop biomarkers that could identify the illness. Extensive postmortem and in vivo neuroimaging research has described the early involvement of the hippocampus in the pathophysiology of schizophrenia. In this context, we have developed a hypothesis that describes the evolution of schizophrenia-from the premorbid through the prodromal stages to syndromal psychosis-and posits dysregulation of glutamate neurotransmission beginning in the CA1 region of the hippocampus as inducing attenuated psychotic symptoms and initiating the transition to syndromal psychosis...
January 9, 2018: Molecular Psychiatry
https://www.readbyqxmd.com/read/29307005/effect-of-cerebral-embolus-size-on-the-timing-of-cardiac-surgery-for-infective-endocarditis-in-patients-with-neurological-complications
#16
Yong Kyun Kim, Choong Gon Choi, Jiwon Jung, Shi Nae Yu, Ju Young Lee, Yong Pil Chong, Sung-Han Kim, Sang-Oh Lee, Sang-Ho Choi, Jun Hee Woo, Yang Soo Kim
The optimal timing of cardiac surgery remains unclear for patients with neurological complications of infective endocarditis (IE). However, neuroimaging findings may allow more refined clinical decision-making. We analyzed clinical and advanced neuroimaging data for 135 patients with IE who had preoperatively diagnosed ischemic cerebral complications (86 patients) or hemorrhagic complications (49 patients), between January 1997 and May 2013. The effect of early surgery (within 3 and 7 days of ischemic and hemorrhagic complications respectively) on in-hospital mortality and 1-year adverse outcomes (mortality, relapse, or new embolic events) was estimated...
January 6, 2018: European Journal of Clinical Microbiology & Infectious Diseases
https://www.readbyqxmd.com/read/29303470/previously-unreported-complications-associated-with-integrated-cage-screws-following-anterior-lumbar-interbody-fusion-report-of-2-cases
#17
Neginder Saini, Mohammad Zaidi, Maureen T Barry, Robert F Heary
Anterior lumbar interbody fusion (ALIF) is a widely performed surgical treatment for various lumbar spine pathologies. The authors present the first reports of virtually identical cases of complications with integrated screws in stand-alone interbody cages. Two patients presented with the onset of S-1 radiculopathy due to screw misplacements following an ALIF procedure. In both cases, an integrated screw from the cage penetrated the dorsal aspect of the S-1 cortical margin of the vertebra, extended into the neural foramen, and injured the traversing left S-1 nerve roots...
January 5, 2018: Journal of Neurosurgery. Spine
https://www.readbyqxmd.com/read/29301099/from-maps-to-multi-dimensional-network-mechanisms-of-mental-disorders
#18
REVIEW
Urs Braun, Axel Schaefer, Richard F Betzel, Heike Tost, Andreas Meyer-Lindenberg, Danielle S Bassett
The development of advanced neuroimaging techniques and their deployment in large cohorts has enabled an assessment of functional and structural brain network architecture at an unprecedented level of detail. Across many temporal and spatial scales, network neuroscience has emerged as a central focus of intellectual efforts, seeking meaningful descriptions of brain networks and explanatory sets of network features that underlie circuit function in health and dysfunction in disease. However, the tools of network science commonly deployed provide insight into brain function at a fundamentally descriptive level, often failing to identify (patho-)physiological mechanisms that link system-level phenomena to the multiple hierarchies of brain function...
January 3, 2018: Neuron
https://www.readbyqxmd.com/read/29298989/lost-in-translation-how-to-upgrade-fear-memory-research
#19
REVIEW
África Flores, Miquel À Fullana, Carles Soriano-Mas, Raül Andero
We address some of the current limitations of translational research in fear memory and suggest alternatives that might help to overcome them. Appropriate fear responses are adaptive, but disruption of healthy fear memory circuits can lead to anxiety and fear-based disorders. Stress is one of the main environmental factors that can disrupt memory circuits and constitutes as a key factor in the etiopathology of these psychiatric conditions. Current therapies for anxiety and fear-based disorders have limited success rate, revealing a clear need for an improved understanding of their neurobiological basis...
January 3, 2018: Molecular Psychiatry
https://www.readbyqxmd.com/read/29298483/a-metal-protein-attenuating-compound-for-pet-neuroimaging-synthesis-and-preclinical-evaluation-of-11c-pbt2
#20
Hema S Krishnan, Vadim Bernard-Gauthier, Michael Stephen Placzek, Kenneth Dahl, Vidya Narayanaswami, Elijahu Livni, Zhen Chen, Jing Yang, Thomas Lee Collier, Chongzhao Ran, Jacob M Hooker, Steven H Liang, Neil Vasdev
Dyshomeostasis or abnormal accumulation of metal ions such as copper, zinc and iron have been linked to the pathogenesis of multiple neurodegenerative disorders including Alzheimer's disease (AD) and Huntington's disease (HD). 5,7-Dichloro-2-((dimethylamino)methyl)quinolin-8-ol, PBT2, is a second generation metal protein-attenuating compound that has recently advanced in Phase II clinical trials for the treatment of AD and HD based on promising preclinical efficacy data. Herein, we report the first radiosynthesis and preclinical positron emission tomography (PET) neuroimaging evaluation of [11C]PBT2 in rodents and nonhuman primates...
January 3, 2018: Molecular Pharmaceutics
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