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neuroimaging review

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https://www.readbyqxmd.com/read/28646252/childhood-brain-tumors-a-systematic-review-of-the-structural-neuroimaging-literature
#1
REVIEW
Alyssa S Ailion, Kyle Hortman, Tricia Z King
Due to medical advances, a large portion of children survive brain tumor diagnosis and treatment. Therefore, it is important to identify the neuroanatomical and neurocognitive outcomes associated with survivorship. This review summarizes the specific regional structural neuroimaging findings, the broad structural findings, as well as the corresponding neurocognitive domains affected in brain tumor populations. Across studies, damage is commonly reported near the cerebellum, brain stem, and subcortical regions, as well as the frontal lobes...
June 23, 2017: Neuropsychology Review
https://www.readbyqxmd.com/read/28645967/the-bipolar-illness-onset-study-research-protocol-for-the-bio-cohort-study
#2
Lars Vedel Kessing, Klaus Munkholm, Maria Faurholt-Jepsen, Kamilla Woznica Miskowiak, Lars Bo Nielsen, Ruth Frikke-Schmidt, Claus Ekstrøm, Ole Winther, Bente Klarlund Pedersen, Henrik Enghusen Poulsen, Roger S McIntyre, Flavio Kapczinski, Wagner F Gattaz, Jakob Bardram, Mads Frost, Oscar Mayora, Gitte Moos Knudsen, Mary Phillips, Maj Vinberg
INTRODUCTION: Bipolar disorder is an often disabling mental illness with a lifetime prevalence of 1%-2%, a high risk of recurrence of manic and depressive episodes, a lifelong elevated risk of suicide and a substantial heritability. The course of illness is frequently characterised by progressive shortening of interepisode intervals with each recurrence and increasing cognitive dysfunction in a subset of individuals with this condition. Clinically, diagnostic boundaries between bipolar disorder and other psychiatric disorders such as unipolar depression are unclear although pharmacological and psychological treatment strategies differ substantially...
June 23, 2017: BMJ Open
https://www.readbyqxmd.com/read/28644061/diffusion-weighted-magnetic-resonance-imaging-in-the-assessment-of-choroid-plexus-aging
#3
Banu Alicioglu, Guliz Yilmaz, Ozgur Tosun, Nail Bulakbasi
Recent studies have pointed out dysfunction and histopathological changes of the choroid plexuses (CPs) with aging. This paper reviews apparent diffusion coefficient (ADC) values of the CPs for age-related changes. All the brain MR images of the patients between January 2013 and June 2014 in our Radiology Department were retrospectively investigated. Patients with major cranial abnormalities (brain tumors, hyperacute or acute ischemia, developmental anomalies, hemorrhage, hydrocephaly) were excluded. Diffusion-weighted images were obtained at the parameter values of b = 1000 s/mm(2) in the axial plane...
January 1, 2017: Neuroradiology Journal
https://www.readbyqxmd.com/read/28641497/a-neuropsychiatric-analysis-of-the-cotard-delusion
#4
Aradhana Sahoo, Keith A Josephs
Cotard's syndrome, a condition in which the patient denies his or her own existence or the existence of body parts, is a rare illness that has been reported in association with several neuropsychiatric diagnoses. The majority of published literature on the topic is in the form of case reports, many of which are several years old. The authors evaluated associated diagnoses, neuroimaging, and treatments recorded in patients diagnosed with Cotard's syndrome at their institution. A search of the Mayo Clinic database for patients with mention of signs and symptoms associated with Cotard's in their records between 1996 and 2016 was conducted...
June 23, 2017: Journal of Neuropsychiatry and Clinical Neurosciences
https://www.readbyqxmd.com/read/28639808/a-quarter-century-of-advances-in-the-statistical-analysis-of-longitudinal-neuropsychological-data
#5
John L Woodard
OBJECTIVE: Over the last 25 years, there has been an unprecedented increase in federal funding for large-scale longitudinal studies, many of which collect neuropsychological or neuroimaging outcome measures. These studies have collected data from thousands of study participants across multiple waves of data collection over many years. With the increased availability of longitudinal data, data sharing policies have become more liberal, thereby offering significant opportunities for interested researchers to carry out their own longitudinal research with these data...
June 22, 2017: Neuropsychology
https://www.readbyqxmd.com/read/28638568/dizziness-in-a-community-hospital-central-neurological-causes-clinical-predictors-and-diagnostic-yield-and-cost-of-neuroimaging-studies
#6
Hussam Ammar, Rukma Govindu, Ragai Fouda, Wael Zohdy, Emilio Supsupin
Objectives: Neuroimaging is contributing to the rising costs of dizziness evaluation. This study examined the rate of central neurological causes of dizziness, relevant clinical predictors, and the costs and diagnostic yields of neuroimaging in dizziness assessment. Methods: We retrospectively reviewed the records of 521 adult patients who visited the hospital during a 12-month period with dizziness as the chief complaint. Clinical findings were analyzed using Fisher's exact test to determine how they correlated with central neurological causes of dizziness identified by neuroimaging...
March 2017: Journal of Community Hospital Internal Medicine Perspectives
https://www.readbyqxmd.com/read/28638291/pain-and-psychology-a-reciprocal-relationship
#7
REVIEW
Nalini Vadivelu, Alice M Kai, Gopal Kodumudi, Karine Babayan, Manuel Fontes, Matthew M Burg
BACKGROUND: Depression typically affects 5% of the general population, but among patients with chronic pain, 30%-45% experience depression. Studies have shown that the relationship between depression and pain is bidirectional: depression is a positive predictor of the development of chronic pain, and chronic pain increases the risk of developing depression. METHODS: This literature review focuses on the relationship between psychology and pain, covering studies that have investigated the association between depression, pain sensitivity, opioid abuse, and gender differences in pain perception...
2017: Ochsner Journal
https://www.readbyqxmd.com/read/28637943/stereoelectroencephalography-indication-and-efficacy
#8
Koji Iida, Hiroshi Otsubo
Stereoelectroencephalography (SEEG) is a method for invasive study of patients with refractory epilepsy. Localization of the epileptogenic zone in SEEG relied on the hypothesis of anatomo-electro-clinical analysis limited by X-ray, analog electroencephalography (EEG), and seizure semiology in the 1950s. Modern neuroimaging studies and digital video-EEG have developed the hypothesis aiming at more precise localization of the epileptic network. Certain clinical scenarios favor SEEG over subdural EEG (SDEEG). SEEG can cover extensive areas of bilateral hemispheres with highly accurate sampling from sulcal areas and deep brain structures...
June 20, 2017: Neurologia Medico-chirurgica
https://www.readbyqxmd.com/read/28637814/effective-assessments-of-electroencephalography-during-stroke-recovery-contemporary-approaches-and-considerations
#9
Kartik K Iyer
Stroke is one of the leading causes of permanent disability worldwide, relying conventionally on extended periods of physiotherapy to recover functional ability. While neuroimaging techniques and emerging neurorehabilitation paradigms have advanced our understanding of pathophysiological mechanisms underlying stroke, recent evidence has renewed focus on quantifying cortical features of electroencephalography to greatly enhance our understanding of stroke recovery. This Neuro Forum article reviews these key advances and discusses the importance of quantifying electroencephalography in future assessments of stroke survivors...
June 21, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/28636217/research-on-potential-biomarker-correlates-for-suicidal-behavior-a-review
#10
REVIEW
Sangha Kim, Kyoung-Uk Lee
Suicide is a world health priority. Studies over the last few decades have revealed the complexity underlying the neurobiological mechanisms of suicide. Researchers have found dysregulations in the serotonergic system, the stress system, neural plasticity, lipid metabolism, and cell signaling pathways in relation to suicidal behaviors. These findings have provided more insight into the final path leading to suicide, at which medical intervention should be applied to prevent the action. However, because these molecular mechanisms have been implicated in both depression and suicide, the specificity of the mechanisms has been obscured...
June 21, 2017: Asia-Pacific Psychiatry: Official Journal of the Pacific Rim College of Psychiatrists
https://www.readbyqxmd.com/read/28632043/simultanagnosia-and-object-individuation
#11
Veronica Mazza
Simultanagnosic patients have difficulty in perceiving multiple objects when presented simultaneously. In this review article, I discuss how neuropsychological research on simultanagnosia has been inspirational for two interconnected lines of research related to the core mechanisms by which the visual system processes cluttered scenes. First, I review previous studies on enumeration tasks indicating that, despite their inability to identify multiple objects, simultanagnosic patients can enumerate up to 2-3 elements as efficiently as healthy individuals (the so-called "subitizing" phenomenon)...
June 6, 2017: Cognitive Neuropsychology
https://www.readbyqxmd.com/read/28631578/the-journey-to-autism-insights-from-neuroimaging-studies-of-infants-and-toddlers
#12
Jason J Wolff, Suma Jacob, Jed T Elison
By definition, autism spectrum disorder (ASD) is a neurodevelopmental disorder that emerges during early childhood. It is during this time that infants and toddlers transition from appearing typical across multiple domains to exhibiting the behavioral phenotype of ASD. Neuroimaging studies focused on this period of development have provided crucial knowledge pertaining to this process, including possible mechanisms underlying pathogenesis of the disorder and offering the possibility of prodromal or presymptomatic prediction of risk...
June 20, 2017: Development and Psychopathology
https://www.readbyqxmd.com/read/28628911/a-carasil-patient-from-americas-with-novel-mutation-and-atypical-features-case-presentation-and-literature-review
#13
Muhammad Ibrahimi, Hiroaki Nozaki, Angelica Lee, Osamu Onodera, Raymond Reichwein, Matthew Wicklund, Mohammad El-Ghanem
OBJECTIVE: Reporting a novel mutation in the HTRA1 gene in a CARASIL patient from Americas. METHODS: Clinical presentation and neuroimaging were consistent with CARASIL. HTRA1 DNA sequencing was performed using advanced ("next generation") sequencing technology. The results revealed a homozygous missense mutation as c.616G>A (p.Gly206Arg) in the HTRA1 gene. RESULTS: A 24-year-old man with a history of chronic back pain presented with recurrent ischemic strokes...
June 21, 2017: Cerebrovascular Diseases
https://www.readbyqxmd.com/read/28626813/hallucinations-as-top-down-effects-on-perception
#14
Albert R Powers, Megan Kelley, Philip R Corlett
The problem of whether and how information is integrated across hierarchical brain networks embodies a fundamental tension in contemporary cognitive neuroscience, and by extension, cognitive neuropsychiatry. Indeed, the penetrability of perceptual processes in a 'top-down' manner by higher-level cognition-a natural extension of hierarchical models of perception-may contradict a strictly modular view of mental organization. Furthermore, some in the cognitive science community have challenged cognitive penetration as an unlikely, if not impossible, process...
September 2016: Biological Psychiatry: Cognitive Neuroscience and Neuroimaging
https://www.readbyqxmd.com/read/28624433/the-highs-and-lows-of-the-human-brain-on-dopaminergics-evidence-from-neuropharmacology
#15
REVIEW
Daniel Martins, Mitul A Mehta, Diana Prata
Rewards are appetitive events that elicit approach. Ground-breaking findings from neurophysiological experiments in animals, alongside neuropharmacology and neuroimaging research in human samples have identified dopamine as the main neurochemical messenger of global reward processing in the brain. However, dopamine's contribution to the different components of reward processing remains to be precisely defined. To facilitate the informed design and interpretation of reward studies in humans, we have systematically reviewed all existing human pharmacological studies investigating how drug manipulation of the dopamine system affects reward-related behaviour and its neural correlates...
June 15, 2017: Neuroscience and Biobehavioral Reviews
https://www.readbyqxmd.com/read/28624265/the-neuroscience-of-understanding-the-emotions-of-others
#16
REVIEW
Robert P Spunt, Ralph Adolphs
We cannot help but impute emotions to the behaviors of others, and constantly infer not only what others are feeling, but also why they feel that way. The comprehension of other people's emotional states is computationally complex and difficult, requiring the flexible, context-sensitive deployment of cognitive operations that encompass rapid orienting to, and recognition of, emotionally salient cues; classification of emotions into culturally-learned categories; and using an abstract theory of mind to reason about what caused the emotion, what future actions the person might be planning, and what we should do next in response...
June 14, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28624098/utility-of-neurovascular-imaging-in-acute-neonatal-arterial-ischemic-stroke
#17
Ishita Siddiq, Derek Armstrong, Ann-Marie Surmava, Nomazulu Dlamini, Daune MacGregor, Mahendranath Moharir, Rand Askalan
OBJECTIVE: To evaluate the prevalence of magnetic resonance angiography (MRA) findings and clinically characterize neonates with arterial ischemic stroke (AIS) who have abnormal or variable vasculature. STUDY DESIGN: This was a single-center, retrospective study of patients with neonatal stroke from 1991 to 2012. We reviewed charts and neuroimaging, including MRA, in neonates with AIS. Clinical data of patients with MRA findings were compared with the control group of neonates with AIS and a normal MRA...
June 14, 2017: Journal of Pediatrics
https://www.readbyqxmd.com/read/28620849/clinical-management-of-dystonia-in-childhood
#18
REVIEW
Quyen N Luc, Jyes Querubin
Dystonia is one of the most frequent movement disorders in childhood. It can impede normal motor development and cause significant motor disability. The diagnostic evaluation of childhood dystonia is challenging due to the phenotypic variability and heterogeneous etiologies. Evidence to guide the diagnostic evaluation and treatment is limited. Assessment is primarily directed by clinical history and distinctive examination findings. Neuroimaging is typically necessary to evaluate for acquired or complex inherited dystonias...
June 15, 2017: Paediatric Drugs
https://www.readbyqxmd.com/read/28620783/advanced-neuroimaging-of-cerebral-small-vessel-disease
#19
REVIEW
Gordon W Blair, Maria Valdez Hernandez, Michael J Thrippleton, Fergus N Doubal, Joanna M Wardlaw
Cerebral small vessel disease (SVD) is characterised by damage to deep grey and white matter structures of the brain and is responsible for a diverse range of clinical problems that include stroke and dementia. In this review, we describe advances in neuroimaging published since January 2015, mainly with magnetic resonance imaging (MRI), that, in general, are improving quantification, observation and investigation of SVD focussing on three areas: quantifying the total SVD burden, imaging brain microstructural integrity and imaging vascular malfunction...
July 2017: Current Treatment Options in Cardiovascular Medicine
https://www.readbyqxmd.com/read/28619656/the-large-scale-functional-connectivity-correlates-of-consciousness-and-arousal-during-the-healthy-and-pathological-human-sleep-cycle
#20
REVIEW
Enzo Tagliazucchi, Eus J W van Someren
Advances in neuroimaging have greatly improved our understanding of human sleep from a systems neuroscience perspective. However, cognition and awareness are reduced during sleep, hindering the applicability of standard task-based paradigms. Methods recently developed to study spontaneous brain activity fluctuations have proven useful to overcome this limitation. In this review, we focus on the concept of functional connectivity (FC, i.e. statistical covariance between brain activity signals) and its application to functional magnetic resonance imaging (fMRI) data acquired during sleep...
June 12, 2017: NeuroImage
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