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https://www.readbyqxmd.com/read/29673625/abnormal-target-detection-and-novelty-processing-neural-response-in-posttraumatic-stress-disorder
#1
Pilar M Sanjuan, Chloe Andrews, Eric D Claus
Attention impairments are common symptoms of posttraumatic stress disorder (PTSD); however, the nature of these impairments remains elusive. Attention impairment may arise as the result of either excessive response to task-irrelevant stimuli or reduced response to task-relevant information. To test the association between PTSD and response to task-relevant and task-irrelevant stimuli, we used a 3-tone novelty auditory oddball task (AOD). We hypothesized that participants with PTSD relative to trauma controls would have less response during novelty processing in the dorsolateral prefrontal cortex (dlPFC) and the anterior cingulate cortex, as well as less response in the dlPFC and the orbitofrontal cortex during target detection...
April 16, 2018: Progress in Neuro-psychopharmacology & Biological Psychiatry
https://www.readbyqxmd.com/read/29665283/accelerated-executive-functions-decline-and-gray-matter-structural-changes-in-middle-aged-type-1-diabetes-patients-with-proliferative-retinopathy
#2
Eelco van Duinkerken, Martijn D Steenwijk, Martin Klein, Frederik Barkhof, Daniel C Mograbi, Michaela Diamant, Frank J Snoek, Richard G Ijzerman
BACKGROUND: The aim of this study was to determine trajectories of cognitive and cortical changes over time in middle-aged patients with type 1 diabetes and proliferative retinopathy. METHODS: Twenty-five patients and 25 controls underwent neuropsychological assessment and neuroimaging twice in 3.56 ± 0.65 and 3.94 ± 0.91 years respectively (P = 0.098). Cognitive assessment included the domains of general cognitive ability, memory, information processing speed, executive functions, attention, motor and psychomotor speed...
April 17, 2018: Journal of Diabetes
https://www.readbyqxmd.com/read/29660812/tremor-severity-in-parkinson-s-disease-and-cortical-changes-of-areas-controlling-movement-sequencing-a-preliminary-study
#3
Julián Benito-León, J Ignacio Serrano, Elan D Louis, Ales Holobar, Juan P Romero, P Povalej-Bržan, Félix Bermejo-Pareja, M Dolores Del Castillo, Ignacio J Posada, Eduardo Rocon
There remains much to learn about the changes in cortical anatomy that are associated with tremor severity in Parkinson's disease (PD). For this reason, we used a combination of structural neuroimaging to measure cortical thickness and neurophysiological studies to analyze whether PD tremor was associated with cortex integrity. Magnetic resonance imaging and neurophysiological assessment were performed in 13 nondemented PD patients (9 women, 69.2%) with a clearly tremor-dominant phenotype. Cortical reconstruction and volumetric segmentation were performed with the Freesurfer image analysis software...
April 16, 2018: Journal of Neuroscience Research
https://www.readbyqxmd.com/read/29628272/altered-grey-matter-volume-and-cortical-thickness-in-patients-with-schizo-obsessive-comorbidity
#4
Yong-Ming Wang, Lai-Quan Zou, Wen-Lan Xie, Zhuo-Ya Yang, Xiong-Zhao Zhu, Eric F C Cheung, Thomas Alrik Sørensen, Arne Møller, Raymond C K Chan
Recent findings suggest that schizo-obsessive comorbidity (SOC) may be a unique diagnostic entity. We examined grey matter (GM) volume and cortical thickness in 22 patients with SOC, and compared them with 21 schizophrenia (SCZ) patients, 22 obsessive-compulsive disorder (OCD) patients and 22 healthy controls (HCs). We found that patients with SOC exhibited reduced GM volume in the left thalamus, the left inferior semi-lunar lobule of the cerebellum, the bilateral medial orbitofrontal cortex (medial oFC), the medial superior frontal gyrus (medial sFG), the rectus gyrus and the anterior cingulate cortex (aCC) compared with HCs...
March 28, 2018: Psychiatry Research
https://www.readbyqxmd.com/read/29624772/separation-of-trait-and-state-in-stuttering
#5
Emily L Connally, David Ward, Christos Pliatsikas, Sarah Finnegan, Mark Jenkinson, Rowan Boyles, Kate E Watkins
Stuttering is a disorder in which the smooth flow of speech is interrupted. People who stutter show structural and functional abnormalities in the speech and motor system. It is unclear whether functional differences reflect general traits of the disorder or are specifically related to the dysfluent speech state. We used a hierarchical approach to separate state and trait effects within stuttering. We collected sparse-sampled functional MRI during two overt speech tasks (sentence reading and picture description) in 17 people who stutter and 16 fluent controls...
April 6, 2018: Human Brain Mapping
https://www.readbyqxmd.com/read/29618992/fronto-temporal-connectivity-predicts-ect-outcome-in-major-depression
#6
Amber M Leaver, Benjamin Wade, Megha Vasavada, Gerhard Hellemann, Shantanu H Joshi, Randall Espinoza, Katherine L Narr
Background: Electroconvulsive therapy (ECT) is arguably the most effective available treatment for severe depression. Recent studies have used MRI data to predict clinical outcome to ECT and other antidepressant therapies. One challenge facing such studies is selecting from among the many available metrics, which characterize complementary and sometimes non-overlapping aspects of brain function and connectomics. Here, we assessed the ability of aggregated, functional MRI metrics of basal brain activity and connectivity to predict antidepressant response to ECT using machine learning...
2018: Frontiers in Psychiatry
https://www.readbyqxmd.com/read/29618125/distributed-affective-space-represents-multiple-emotion-categories-across-the-human-brain
#7
Heini Saarimäki, Lara Farzaneh Ejtehadian, Enrico Glerean, Iiro P Jääskeläinen, Patrik Vuilleumier, Mikko Sams, Lauri Nummenmaa
The functional organization of human emotion systems as well as their neuroanatomical basis and segregation in the brain remains unresolved. Here we used pattern classification and hierarchical clustering to characterize the organization of a range of specific emotion categories in the human brain. We induced 14 emotions (6 "basic", e.g. fear and anger; and 8 "non-basic", e.g. shame and gratitude) and a neutral state using guided mental imagery while participants' brain activity was measured with functional magnetic resonance imaging (fMRI)...
March 28, 2018: Social Cognitive and Affective Neuroscience
https://www.readbyqxmd.com/read/29614707/best-core-stabilization-exercise-to-facilitate-subcortical-neuroplasticity-a-functional-mri-neuroimaging-study
#8
Do Hyun Kim, Jae Jin Lee, Sung Joshua Hyun You
OBJECTIVE: To investigate the effects of conscious (ADIM) and subconscious (DNS) core stabilization exercises on cortical changes in adults with core instability. PARTICIPANTS: Five non-symptomatic participants with core instability. METHODS: A novel core stabilization task switching paradigm was designed to separate cortical or subcortical neural substrates during a series of DNS or ADIM core stabilization tasks. RESULTS: fMRI blood BOLD analysis revealed a distinctive subcortical activation pattern during the performance of the DNS, whereas the cortical motor network was primarily activated during an ADIM...
March 23, 2018: Technology and Health Care: Official Journal of the European Society for Engineering and Medicine
https://www.readbyqxmd.com/read/29584746/communication-calls-produced-by-electrical-stimulation-of-four-structures-in-the-guinea-pig-brain
#9
David B Green, Trevor M Shackleton, Jasmine M S Grimsley, Oliver Zobay, Alan R Palmer, Mark N Wallace
One of the main central processes affecting the cortical representation of conspecific vocalizations is the collateral output from the extended motor system for call generation. Before starting to study this interaction we sought to compare the characteristics of calls produced by stimulating four different parts of the brain in guinea pigs (Cavia porcellus). By using anaesthetised animals we were able to reposition electrodes without distressing the animals. Trains of 100 electrical pulses were used to stimulate the midbrain periaqueductal grey (PAG), hypothalamus, amygdala, and anterior cingulate cortex (ACC)...
2018: PloS One
https://www.readbyqxmd.com/read/29574086/cerebral-gray-matter-volume-losses-in-essential-tremor-a-case-control-study-using-high-resolution-tissue-probability-maps
#10
Eric Cameron, Jonathan P Dyke, Nora Hernandez, Elan D Louis, Ulrike Dydak
INTRODUCTION: Essential tremor (ET) is increasingly recognized as a multi-dimensional disorder with both motor and non-motor features. For this reason, imaging studies are more broadly examining regions outside the cerebellar motor loop. Reliable detection of cerebral gray matter (GM) atrophy requires optimized processing, adapted to high-resolution magnetic resonance imaging (MRI). We investigated cerebral GM volume loss in ET cases using automated segmentation of MRI T1-weighted images...
March 10, 2018: Parkinsonism & related Disorders
https://www.readbyqxmd.com/read/29559760/extrinsic-functional-connectivity-of-the-default-mode-network-in-crack-cocaine-users
#11
Diego Lima Nava Martins, Talles Destefani de Souza Valiatti, Júlia D'Ávila, Lucas Freire Ferreira, Edson Kruger Batista, Paulo Rodrigo Bazán, Rodrigo Stênio Moll de Souza, Ester Miyuki Nakamura-Palacios
Objective: This study aimed to explore the functional connectivity of the default mode network (DMN) in crack-cocaine users, in comparison with that observed in age-matched non-drug-using controls. Materials and Methods: Inpatient crack-cocaine users who had been abstinent for at least four weeks and age-matched non-drug-using controls underwent resting state functional magnetic resonance imaging. Images were acquired while the subjects rested with their eyes closed...
January 2018: Radiologia Brasileira
https://www.readbyqxmd.com/read/29554643/changes-in-neural-activation-underlying-attention-processing-of-emotional-stimuli-following-treatment-with-positive-search-training-in-anxious-children
#12
Allison M Waters, Yuan Cao, Rachel Kershaw, Georg M Kerbler, David H K Shum, Melanie J Zimmer-Gembeck, Michelle G Craske, Brendan P Bradley, Karin Mogg, Daniel S Pine, Ross Cunnington
Prior research indicates that positive search training (PST) may be a promising home-based computerised treatment for childhood anxiety disorders. It explicitly trains anxious individuals in adaptive, goal-directed attention-search strategies to search for positive and calm information and ignore goal-irrelevant negative cues. Although PST reduces anxiety symptoms, its neural effects are unknown. The main aim of this study was to examine changes in neural activation associated with changes in attention processing of positive and negative stimuli from pre- to post-treatment with PST in children with anxiety disorders...
March 11, 2018: Journal of Anxiety Disorders
https://www.readbyqxmd.com/read/29548020/alterations-in-cortical-thickness-and-subcortical-volume-are-associated-with-neurological-symptoms-and-neck-pain-in-patients-with-cervical-spondylosis
#13
Davis C Woodworth, Langston T Holly, Emeran A Mayer, Noriko Salamon, Benjamin M Ellingson
BACKGROUND: Advanced cervical spondylosis (CS) can cause structural damage to the spinal cord resulting in long-term neurological impairment including neck pain and motor weakness. We hypothesized long-term structural reorganization within the brain in patients with CS. OBJECTIVE: To explore the associations between cortical thickness, subcortical volumes, neurological symptoms, and pain severity in CS patients with or without myelopathy and healthy controls (HCs)...
March 14, 2018: Neurosurgery
https://www.readbyqxmd.com/read/29545745/monetary-reward-and-punishment-to-response-inhibition-modulate-activation-and-synchronization-within-the-inhibitory-brain-network
#14
Rupesh K Chikara, Erik C Chang, Yi-Chen Lu, Dar-Shong Lin, Chin-Teng Lin, Li-Wei Ko
A reward or punishment can modulate motivation and emotions, which in turn affect cognitive processing. The present simultaneous functional magnetic resonance imaging-electroencephalography study examines neural mechanisms of response inhibition under the influence of a monetary reward or punishment by implementing a modified stop-signal task in a virtual battlefield scenario. The participants were instructed to play as snipers who open fire at a terrorist target but withhold shooting in the presence of a hostage...
2018: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/29545744/structural-covariance-of-the-prefrontal-amygdala-pathways-associated-with-heart-rate-variability
#15
Luqing Wei, Hong Chen, Guo-Rong Wu
The neurovisceral integration model has shown a key role of the amygdala in neural circuits underlying heart rate variability (HRV) modulation, and suggested that reciprocal connections from amygdala to brain regions centered on the central autonomic network (CAN) are associated with HRV. To provide neuroanatomical evidence for these theoretical perspectives, the current study used covariance analysis of MRI-based gray matter volume (GMV) to map structural covariance network of the amygdala, and then determined whether the interregional structural correlations related to individual differences in HRV...
2018: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/29541774/the-role-of-aging-drug-dependence-and-hepatitis-c-comorbidity-in-alcoholism-cortical-compromise
#16
Edith V Sullivan, Natalie M Zahr, Stephanie A Sassoon, Wesley K Thompson, Dongjin Kwon, Kilian M Pohl, Adolf Pfefferbaum
Importance: The prevalence of alcohol misuse increased substantially over a decade in adults, particularly in those aged 65 years or older. Ramifications for brain structural integrity are significant, especially in older adults. Objectives: To combine cross-sectional, longitudinal data to test age-alcoholism interactions and examine the association between prevalent comorbidities (drug dependence and hepatitis C virus [HCV] infection) and cortical volume deficits in alcohol dependence...
March 14, 2018: JAMA Psychiatry
https://www.readbyqxmd.com/read/29530489/abnormal-ventral-tegmental-area-anterior-cingulate-cortex-connectivity-in-parkinson-s-disease-with-depression
#17
Luqing Wei, Xiao Hu, Yonggui Yuan, Weiguo Liu, Hong Chen
Neuropathology suggests that Parkinson's disease (PD) with depression may involve a progressive degeneration of the nigrostriatal and mesocorticolimbic dopaminergic systems. Previous positron emission tomography (PET) and single-photon emission computed tomography (SPECT) studies have shown that dopamine changes in individual brain regions constituting the nigrostriatal and mesocorticolimbic circuits are associated with depression in PD. However, few studies have been conducted on the circuit-level alterations in this disease...
March 9, 2018: Behavioural Brain Research
https://www.readbyqxmd.com/read/29529887/gray-matter-differences-in-the-anterior-cingulate-and-orbitofrontal-cortex-of-young-adults-with-internet-gaming-disorder-surface-based-morphometry
#18
Deokjong Lee, Jinsick Park, Kee Namkoong, In Young Kim, Young-Chul Jung
Background and aims Altered risk/reward decision-making is suggested to predispose individuals with Internet gaming disorder (IGD) to pursue short-term pleasure, despite long-term negative consequences. The anterior cingulate cortex (ACC) and the orbitofrontal cortex (OFC) play important roles in risk/reward decision-making. This study investigated gray matter differences in the ACC and OFC of young adults with and without IGD using surface-based morphometry (SBM). Methods We examined 45 young male adults with IGD and 35 age-matched male controls...
March 13, 2018: Journal of Behavioral Addictions
https://www.readbyqxmd.com/read/29528161/heritability-of-aggression-following-social-evaluation-in-middle-childhood-an-fmri-study
#19
Michelle Achterberg, Anna C K van Duijvenvoorde, Mara van der Meulen, Marian J Bakermans-Kranenburg, Eveline A Crone
Middle childhood marks an important phase for developing and maintaining social relations. At the same time, this phase is marked by a gap in our knowledge of the genetic and environmental influences on brain responses to social feedback and their relation to behavioral aggression. In a large developmental twin sample (509 7- to 9-year-olds), the heritability and neural underpinnings of behavioral aggression following social evaluation were investigated, using the Social Network Aggression Task (SNAT). Participants viewed pictures of peers that gave positive, neutral, or negative feedback to the participant's profile...
March 12, 2018: Human Brain Mapping
https://www.readbyqxmd.com/read/29527497/dysfunctional-frontal-lobe-activity-during-inhibitory-tasks-in-individuals-with-childhood-trauma-an-event-related-potential-study
#20
Sungkean Kim, Ji Sun Kim, Min Jin Jin, Chang-Hwan Im, Seung-Hwan Lee
Background: Individuals who experience childhood trauma are vulnerable to various psychological and behavioral problems throughout their lifetime. This study aimed to investigate whether individuals with childhood trauma show altered frontal lobe activity during response inhibition tasks. Methods: In total, 157 healthy individuals were recruited and instructed to perform a Go/Nogo task during electroencephalography recording. Source activities of N2 and P3 of Nogo event-related potentials (ERP) were analyzed...
2018: NeuroImage: Clinical
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