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Posterior parietal cortex

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https://www.readbyqxmd.com/read/27897244/neural-oscillations-in-the-temporal-pole-for-a-temporally-congruent-audio-visual-speech-detection-task
#1
Takefumi Ohki, Atsuko Gunji, Yuichi Takei, Hidetoshi Takahashi, Yuu Kaneko, Yosuke Kita, Naruhito Hironaga, Shozo Tobimatsu, Yoko Kamio, Takashi Hanakawa, Masumi Inagaki, Kazuo Hiraki
Though recent studies have elucidated the earliest mechanisms of processing in multisensory integration, our understanding of how multisensory integration of more sustained and complicated stimuli is implemented in higher-level association cortices is lacking. In this study, we used magnetoencephalography (MEG) to determine how neural oscillations alter local and global connectivity during multisensory integration processing. We acquired MEG data from 15 healthy volunteers performing an audio-visual speech matching task...
November 29, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27895564/neural-systems-underlying-emotional-and-non-emotional-interference-processing-an-ale-meta-analysis-of-functional-neuroimaging-studies
#2
Min Xu, Guiping Xu, Yang Yang
Understanding how the nature of interference might influence the recruitments of the neural systems is considered as the key to understanding cognitive control. Although, interference processing in the emotional domain has recently attracted great interest, the question of whether there are separable neural patterns for emotional and non-emotional interference processing remains open. Here, we performed an activation likelihood estimation meta-analysis of 78 neuroimaging experiments, and examined common and distinct neural systems for emotional and non-emotional interference processing...
2016: Frontiers in Behavioral Neuroscience
https://www.readbyqxmd.com/read/27893013/proton-chemical-shift-imaging-of-the-brain-in-pediatric-and-adult-developmental-stuttering
#3
Joseph O'Neill, Zhengchao Dong, Ravi Bansal, Iliyan Ivanov, Xuejun Hao, Jay Desai, Elena Pozzi, Bradley S Peterson
Importance: Developmental stuttering is a neuropsychiatric condition of incompletely understood brain origin. Our recent functional magnetic resonance imaging study indicates a possible partial basis of stuttering in circuits enacting self-regulation of motor activity, attention, and emotion. Objective: To further characterize the neurophysiology of stuttering through in vivo assay of neurometabolites in suspect brain regions. Design, Setting, and Participants: Proton chemical shift imaging of the brain was performed in a case-control study of children and adults with and without stuttering...
November 23, 2016: JAMA Psychiatry
https://www.readbyqxmd.com/read/27883068/-cerebellar-contribution-to-visuo-attentional-alpha-rhythm-insights-from-weightlessness
#4
A M Cebolla, M Petieau, B Dan, L Balazs, J McIntyre, G Cheron
Human brain adaptation in weightlessness follows the necessity to reshape the dynamic integration of the neural information acquired in the new environment. This basic aspect was here studied by the electroencephalogram (EEG) dynamics where oscillatory modulations were measured during a visuo-attentional state preceding a visuo-motor docking task. Astronauts in microgravity conducted the experiment in free-floating aboard the International Space Station, before the space flight and afterwards. We observed stronger power decrease (~ERD: event related desynchronization) of the ~10 Hz oscillation from the occipital-parietal (alpha ERD) to the central areas (mu ERD)...
November 24, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27870506/differential-neurometabolite-alterations-in-brains-of-medication-free-individuals-with-bipolar-disorder-and-those-with-unipolar-depression-a-two-dimensional-proton-magnetic-resonance-spectroscopy-study
#5
Hui Li, Haiyun Xu, Yinnan Zhang, Jitian Guan, Jie Zhang, Chongtao Xu, Zhiwei Shen, Bo Xiao, Chunlian Liang, Kaiyuan Chen, Jinling Zhang, Renhua Wu
OBJECTIVES: Bipolar disorder (BD) is a mental disorder characterized by periods of elevated mood and depression. Many individuals with BD are initially misdiagnosed and treated for unipolar depression (UD). In this study, we report direct comparisons between medication-free individuals with BD and those with UD in terms of the neurometabolites in the anterior cingulate cortex (ACC), medial prefrontal cortex (mPFC), parietal cortex (PC), and posterior cingulate cortex (PCC) of the brain...
November 2016: Bipolar Disorders
https://www.readbyqxmd.com/read/27870417/gender-differences-in-neural-correlates-of-stress-induced-anxiety
#6
Dongju Seo, Aneesha Ahluwalia, Marc N Potenza, Rajita Sinha
Although gender differences have been identified as a crucial factor for understanding stress-related anxiety and associated clinical disorders, the neural mechanisms underlying these differences remain unclear. To explore gender differences in the neural correlates of stress-induced anxiety, the current study used functional magnetic resonance imaging to examine brain responses in 96 healthy men and women with commensurable levels of trait anxiety as they engaged in a personalized guided imagery paradigm to provoke stress and neutral-relaxing experiences...
January 2, 2017: Journal of Neuroscience Research
https://www.readbyqxmd.com/read/27869127/main-effects-of-diagnoses-brain-regions-and-their-interaction-effects-for-cerebral-metabolites-in-bipolar-and-unipolar-depressive-disorders
#7
Hai-Zhu Tan, Hui Li, Chen-Feng Liu, Ji-Tian Guan, Xiao-Bo Guo, Can-Hong Wen, Shao-Min Ou, Yin-Nan Zhang, Jie Zhang, Chong-Tao Xu, Zhi-Wei Shen, Ren-Hua Wu, Xue-Qin Wang
Previous studies suggested patients with bipolar depressive disorder (BDd) or unipolar depressive disorder (UDd) have cerebral metabolites abnormalities. These abnormalities may stem from multiple sub-regions of gray matter in brain regions. Thirteen BDd patients, 20 UDd patients and 20 healthy controls (HC) were enrolled to investigate these abnormalities. Absolute concentrations of 5 cerebral metabolites (glutamate-glutamine (Glx), N-acetylaspartate (NAA), choline (Cho), myo-inositol (mI), creatine (Cr), parietal cortex (PC)) were measured from 4 subregions (the medial frontal cortex (mPFC), anterior cingulate cortex (ACC), posterior cingulate cortex (PCC), and parietal cortex (PC)) of gray matter...
November 21, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27868393/atypical-effective-connectivity-of-thalamo-cortical-circuits-in-autism-spectrum-disorder
#8
Heng Chen, Lucina Q Uddin, Youxue Zhang, Xujun Duan, Huafu Chen
Autism spectrum disorder (ASD) is a neurodevelopment disorder characterized by atypical connectivity within and across multiple brain systems. We aimed to explore information transmission from the sensory periphery to information processing centers of the brain across thalamo-cortical circuits in ASD. A large multicenter dataset from the autism brain imaging data exchange was utilized. A thalamus template derived from the Automatic Anatomic Labeling atlas was subdivided into six subregions corresponding to six cortical regions using a "winner-takes-all" strategy...
November 2016: Autism Research: Official Journal of the International Society for Autism Research
https://www.readbyqxmd.com/read/27864082/individual-variation-in-intentionality-in-the-mind-wandering-state-is-reflected-in-the-integration-of-the-default-mode-fronto-parietal-and-limbic-networks
#9
Johannes Golchert, Jonathan Smallwood, Elizabeth Jefferies, Paul Seli, Julia M Huntenburg, Franziskus Liem, Mark E Lauckner, Sabine Oligschläger, Boris C Bernhardt, Arno Villringer, Daniel S Margulies
Mind-wandering has a controversial relationship with cognitive control. Existing psychological evidence supports the hypothesis that episodes of mind-wandering reflect a failure to constrain thinking to task-relevant material, as well the apparently alternative view that control can facilitate the expression of self-generated mental content. We assessed whether this apparent contradiction arises because of a failure to consider differences in the types of thoughts that occur during mind-wandering, and in particular, the associated level of intentionality...
November 15, 2016: NeuroImage
https://www.readbyqxmd.com/read/27856335/examining-the-impact-of-grape-consumption-on-brain-metabolism-and-cognitive-function-in-patients-with-mild-decline-in-cognition-adouble-blinded-placebo-controlled-pilot-study
#10
Jooyeon Lee, Nare Torosyan, Daniel H Silverman
BACKGROUND: Natural compounds in grapes such as resveratrol are known for their antioxidant and anti-inflammatory properties. Some studies have shown a potential role for grapes or wine in slowing cognitive decline and other effects of aging. However, well-controlled experimental data obtained in human subjects are still in need of further development. Here we aimed to systemically assess effects of grapes on regional cerebral metabolism. METHODS: Ten subjects with mild decline in cognition (mean, 72...
November 14, 2016: Experimental Gerontology
https://www.readbyqxmd.com/read/27852022/-parietal-cortices-and-body-information
#11
Eiichi Naito, Kaoru Amemiya, Tomoyo Morita
Proprioceptive signals originating from skeletal muscles and joints contribute to the formation of both the human body schema and the body image. In this chapter, we introduce various types of bodily illusions that are elicited by proprioceptive inputs, and we discuss distinct functions implemented by different parietal cortices. First, we illustrate the primary importance of the motor network in the processing of proprioceptive (kinesthetic) signals originating from muscle spindles. Next, we argue that the right inferior parietal cortex, in concert with the inferior frontal cortex (both regions connected by the inferior branch of the superior longitudinal fasciculus-SLF III), may be involved in the conscious experience of body image...
November 2016: Brain and Nerve, Shinkei Kenkyū No Shinpo
https://www.readbyqxmd.com/read/27852021/-neuroanatomy-of-the-parietal-association-areas
#12
Yasushi Kobayashi
The parietal association cortex comprises the superior and inferior parietal lobules, the precuneus and the cortices in the intraparietal, parietooccipital and lunate sulci. By processing somatic, visual, acoustic and vestibular sensory information, the parietal association cortex plays a pivotal role in spatial cognition and motor control of the eyes and the extremities. Sensory information from the primary and secondary somatosensory areas enters the superior parietal lobule and is transferred to the inferior parietal lobule...
November 2016: Brain and Nerve, Shinkei Kenkyū No Shinpo
https://www.readbyqxmd.com/read/27852016/-neuroanatomy-of-frontal-association-cortex
#13
Masahiko Takada
The frontal association cortex is composed of the prefrontal cortex and the motor-related areas except the primary motor cortex (i.e., the so-called higher motor areas), and is well-developed in primates, including humans. The prefrontal cortex receives and integrates large bits of diverse information from the parietal, temporal, and occipital association cortical areas (termed the posterior association cortex), and paralimbic association cortical areas. This information is then transmitted to the primary motor cortex via multiple motor-related areas...
November 2016: Brain and Nerve, Shinkei Kenkyū No Shinpo
https://www.readbyqxmd.com/read/27845326/default-mode-network-alterations-in-alexithymia-an-eeg-power-spectra-and-connectivity-study
#14
Claudio Imperatori, Giacomo Della Marca, Riccardo Brunetti, Giuseppe Alessio Carbone, Chiara Massullo, Enrico Maria Valenti, Noemi Amoroso, Giulia Maestoso, Anna Contardi, Benedetto Farina
Recent neuroimaging studies have shown that alexithymia is characterized by functional alterations in different brain areas [e.g., posterior cingulate cortex (PCC)], during emotional/social tasks. However, only few data are available about alexithymic cortical networking features during resting state (RS). We have investigated the modifications of electroencephalographic (EEG) power spectra and EEG functional connectivity in the default mode network (DMN) in subjects with alexithymia. Eighteen subjects with alexithymia and eighteen subjects without alexithymia matched for age and gender were enrolled...
November 15, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27845254/neuronal-correlates-of-continuous-manual-tracking-under-varying-visual-movement-feedback-in-a-virtual-reality-environment
#15
Jakub Limanowski, Evgeniya Kirilina, Felix Blankenburg
To accurately guide one's actions online, the brain predicts sensory action feedback ahead of time based on internal models, which can be updated by sensory prediction errors. The underlying operations can be experimentally investigated in sensorimotor adaptation tasks, in which moving under perturbed sensory action feedback requires internal model updates. Here we altered healthy participants' visual hand movement feedback in a virtual reality setup, while assessing brain activity with functional magnetic resonance imaging (fMRI)...
November 12, 2016: NeuroImage
https://www.readbyqxmd.com/read/27845032/increased-contextual-cue-utilization-with-tdcs-over-the-prefrontal-cortex-during-a-recognition-task
#16
Denise Pergolizzi, Elizabeth F Chua
The precise role of the prefrontal and posterior parietal cortices in recognition performance remains controversial, with questions about whether these regions contribute to recognition via the availability of mnemonic evidence or via decision biases and retrieval orientation. Here we used an explicit memory cueing paradigm, whereby external cues probabilistically predict upcoming memoranda as old or new, in our case with 75% validity, and these cues affect recognition decision biases in the direction of the cue...
November 11, 2016: Brain Research
https://www.readbyqxmd.com/read/27843705/altered-local-spontaneous-activity-in-frontal-lobe-epilepsy-a-resting-state-functional-magnetic-resonance-imaging-study
#17
Li Dong, Hechun Li, Zhongqiong He, Sisi Jiang, Benjamin Klugah-Brown, Lin Chen, Pu Wang, Song Tan, Cheng Luo, Dezhong Yao
PURPOSE: The purpose of this study was to investigate the local spatiotemporal consistency of spontaneous brain activity in patients with frontal lobe epilepsy (FLE). METHOD: Eyes closed resting-state functional magnetic resonance imaging (fMRI) data were collected from 19 FLE patients and 19 age- and gender-matched healthy controls. A novel measure, named FOur-dimensional (spatiotemporal) Consistency of local neural Activities (FOCA) was used to assess the spatiotemporal consistency of local spontaneous activity (emphasizing both local temporal homogeneity and regional stability of brain activity states)...
November 2016: Brain and Behavior
https://www.readbyqxmd.com/read/27843697/filtering-and-storage-working-memory-networks-in-younger-and-older-age
#18
Anne-Katrin Vellage, Andreas Becke, Hendrik Strumpf, Bernhard Baier, Mircea Ariel Schönfeld, Jens-Max Hopf, Notger G Müller
INTRODUCTION: Working memory (WM) is a multi-component model that among others involves the two processes of filtering and storage. The first reflects the necessity to inhibit irrelevant information from entering memory, whereas the latter refers to the active maintenance of object representations in memory. In this study, we aimed at a) redefining the neuronal networks sustaining filtering and storage within visual working memory by avoiding shortcomings of prior studies, and b) assessing age-related changes in these networks...
November 2016: Brain and Behavior
https://www.readbyqxmd.com/read/27834592/the-anterior-temporal-artery-an-underutilized-but-robust-donor-for-revascularization-of-the-distal-middle-cerebral-artery
#19
Ali Tayebi Meybodi, Michael T Lawton, Dylan Griswold, Pooneh Mokhtari, Andre Payman, Arnau Benet
OBJECTIVE The anterior temporal artery (ATA) supplies an area of the brain that, if sacrificed, does not cause a noticeable loss of function. Therefore, the ATA may be used as a donor in intracranial-intracranial (IC-IC) bypass procedures. The capacities of the ATA as a donor have not been studied previously. In this study, the authors assessed the feasibility of using the ATA as a donor for revascularization of different segments of the distal middle cerebral artery (MCA). METHODS The ATA was studied in 15 cadaveric specimens (8 heads, excluding 1 side)...
November 11, 2016: Journal of Neurosurgery
https://www.readbyqxmd.com/read/27833548/dysfunction-of-the-default-mode-network-in-drug-na%C3%A3-ve-parkinson-s-disease-with-mild-cognitive-impairments-a-resting-state-fmri-study
#20
Yanbing Hou, Jing Yang, Chunyan Luo, Wei Song, Ruwei Ou, Wanglin Liu, Qiyong Gong, Huifang Shang
Objective: Cognitive impairments are common in Parkinson's disease (PD) and can even occur in the early stages. The default mode network (DMN) is highly relevant for cognitive processes; however, it remains largely unknown if changes in the DMN connectivity are related to the cognitive decline in drug-naïve early stage PD patients with a mild cognitive impairment (MCI). This study used resting-state functional MRI (fMRI) to explore the brain connectivity of the DMN in early stage drug-naïve PD patients with MCI...
2016: Frontiers in Aging Neuroscience
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