keyword
MENU ▼
Read by QxMD icon Read
search

Thalamus

keyword
https://www.readbyqxmd.com/read/28338943/dysfunction-of-large-scale-brain-networks-in-schizophrenia-a-meta-analysis-of-resting-state-functional-connectivity
#1
Debo Dong, Yulin Wang, Xuebin Chang, Cheng Luo, Dezhong Yao
Schizophrenia is a complex mental disorder with disorganized communication among large-scale brain networks, as demonstrated by impaired resting-state functional connectivity (rsFC). Individual rsFC studies, however, vary greatly in their methods and findings. We searched for consistent patterns of network dysfunction in schizophrenia by using a coordinate-based meta-analysis. Fifty-six seed-based voxel-wise rsFC datasets from 52 publications (2115 patients and 2297 healthy controls) were included in this meta-analysis...
March 11, 2017: Schizophrenia Bulletin
https://www.readbyqxmd.com/read/28338795/-mom-i-don-t-want-to-hear-it-brain-response-to-maternal-praise-and-criticism-in-adolescents-with-major-depressive-disorder
#2
Jennifer S Silk, Kyung Hwa Lee, Rosalind D Elliott, Jill M Hooley, Ronald E Dahl, Anita Barber, Greg J Siegle
Recent research has implicated altered neural response to interpersonal feedback as an important factor in adolescent depression, with existing studies focusing on responses to feedback from virtual peers. We investigated whether depressed adolescents differed from healthy youth in neural response to social evaluative feedback from mothers. During neuroimaging, twenty adolescents in a current episode of major depressive disorder (MDD) and 28 healthy controls listened to previously recorded audio clips of their own mothers' praise, criticism and neutral comments...
February 17, 2017: Social Cognitive and Affective Neuroscience
https://www.readbyqxmd.com/read/28337723/assessment-of-safety-efficacy-and-dosimetry-of-a-novel-18-kda-translocator-protein-ligand-11-c-cb184-in-healthy-human-volunteers
#3
Muneyuki Sakata, Kenji Ishibashi, Masamichi Imai, Kei Wagatsuma, Kenji Ishii, Kentaro Hatano, Kiichi Ishiwata, Jun Toyohara
BACKGROUND: N,N-di-n-propyl-2-[2-(4-[(11)C]methoxyphenyl)-6,8-dichloroimidazol[1,2-a]pyridine-3-yl]acetamide ([(11)C]CB184) is a novel selective radioligand for the 18-kD translocator protein (TSPO), which is upregulated in activated microglia in the brain, and may be useful in positron emission tomography (PET). We examined the safety, radiation dosimetry, and initial brain imaging with [(11)C]CB184 in healthy human volunteers. RESULTS: Dynamic [(11)C]CB184 PET scans (90 min) were performed in five healthy male subjects...
December 2017: EJNMMI Research
https://www.readbyqxmd.com/read/28337409/network-degeneration-and-dysfunction-in-presymptomatic-c9orf72-expansion-carriers
#4
Suzee E Lee, Ana C Sias, Maria Luisa Mandelli, Jesse A Brown, Alainna B Brown, Anna M Khazenzon, Anna A Vidovszky, Theodore P Zanto, Anna M Karydas, Mochtar Pribadi, Deepika Dokuru, Giovanni Coppola, Dan H Geschwind, Rosa Rademakers, Maria Luisa Gorno-Tempini, Howard J Rosen, Bruce L Miller, William W Seeley
Hexanucleotide repeat expansions in C9ORF72 are the most common known genetic cause of familial and sporadic frontotemporal dementia and amyotrophic lateral sclerosis. Previous work has shown that patients with behavioral variant frontotemporal dementia due to C9ORF72 show salience and sensorimotor network disruptions comparable to those seen in sporadic behavioral variant frontotemporal dementia, but it remains unknown how early in the lifespan these and other changes in brain structure and function arise...
2017: NeuroImage: Clinical
https://www.readbyqxmd.com/read/28337130/the-brainstem-in-emotion-a-review
#5
REVIEW
Anand Venkatraman, Brian L Edlow, Mary Helen Immordino-Yang
Emotions depend upon the integrated activity of neural networks that modulate arousal, autonomic function, motor control, and somatosensation. Brainstem nodes play critical roles in each of these networks, but prior studies of the neuroanatomic basis of emotion, particularly in the human neuropsychological literature, have mostly focused on the contributions of cortical rather than subcortical structures. Given the size and complexity of brainstem circuits, elucidating their structural and functional properties involves technical challenges...
2017: Frontiers in Neuroanatomy
https://www.readbyqxmd.com/read/28336122/familial-acute-necrotizing-encephalopathy-with-ranbp2-mutation-the-first-report-in-northeast-asia
#6
Yun-Jeong Lee, Su-Kyeong Hwang, So Mi Lee, Soonhak Kwon
BACKGROUND: Acute necrotizing encephalopathy (ANE) is a rare but rapidly progressing encephalopathy following a febrile illness, commonly a viral infection. It is characterized by the features of acute encephalopathy such as seizure, alteration of consciousness, and symmetric involvement of the bilateral thalamus on neuroimaging tests. Although most ANE cases have occurred sporadically, familial or recurrent ANE has been reported in Caucasian patients, with genetic susceptibility to ANE noted in some patients due to a RANBP2 mutation...
March 20, 2017: Brain & Development
https://www.readbyqxmd.com/read/28334998/spatiotemporal-mapping-of-epileptic-spikes-using-simultaneous-eeg-functional-mri
#7
Jennifer M Walz, Mangor Pedersen, Amir Omidvarnia, Mira Semmelroch, Graeme D Jackson
Epileptic spikes occur on the sub-second timescale and are known to involve not only epileptic foci but also large-scale distributed brain networks. There is likely to be a sequence of neural activity in multiple brain regions that occurs within the duration of a single spike, but standard electroencephalography-functional magnetic resonance imaging analyses, which use only the timing of the spikes to model the functional magnetic resonance imaging data, cannot determine the sequence of these activations. Our aim in this study is to temporally resolve these spatial activations to observe the spatiotemporal dynamics of the spike-related neural activity at a sub-second timescale...
February 20, 2017: Brain: a Journal of Neurology
https://www.readbyqxmd.com/read/28334978/therapeutic-window-of-dopamine-d2-3-receptor-occupancy-to-treat-psychosis-in-alzheimer-s-disease
#8
Suzanne Reeves, Emma McLachlan, Julie Bertrand, Fabrizia D Antonio, Stuart Brownings, Akshay Nair, Suki Greaves, Alan Smith, David Taylor, Joel Dunn, Paul Marsden, Robert Kessler, Robert Howard
Antipsychotic drugs, originally developed to treat schizophrenia, are used to treat psychosis, agitation and aggression in Alzheimer's disease. In the absence of dopamine D2/3 receptor occupancy data to inform antipsychotic prescribing for psychosis in Alzheimer's disease, the mechanisms underpinning antipsychotic efficacy and side effects are poorly understood. This study used a population approach to investigate the relationship between amisulpride blood concentration and central D2/3 occupancy in older people with Alzheimer's disease by combining: (i) pharmacokinetic data (280 venous samples) from a phase I single (50 mg) dose study in healthy older people (n = 20, 65-79 years); (ii) pharmacokinetic, 18F-fallypride D2/3 receptor imaging and clinical outcome data on patients with Alzheimer's disease who were prescribed amisulpride (25-75 mg daily) to treat psychosis as part of an open study (n = 28; 69-92 years; 41 blood samples, five pretreatment scans, 19 post-treatment scans); and (iii) 18F-fallypride imaging of an antipsychotic free Alzheimer's disease control group (n = 10, 78-92 years), to provide additional pretreatment data...
February 4, 2017: Brain: a Journal of Neurology
https://www.readbyqxmd.com/read/28334965/photosensitive-epilepsy-is-associated-with-reduced-inhibition-of-alpha-rhythm-generating-networks
#9
Anna Elisabetta Vaudano, Andrea Ruggieri, Pietro Avanzini, Giuliana Gessaroli, Gaetano Cantalupo, Antonietta Coppola, Sanjay M Sisodiya, Stefano Meletti
Photosensitivity is a condition in which lights induce epileptiform activities. This abnormal electroencephalographic response has been associated with hyperexcitability of the visuo-motor system. Here, we evaluate if intrinsic dysfunction of this network is present in brain activity at rest, independently of any stimulus and of any paroxysmal electroencephalographic activity. To address this issue, we investigated the haemodynamic correlates of the spontaneous alpha rhythm, which is considered the hallmark of the brain resting state, in photosensitive patients and in people without photosensitivity...
February 20, 2017: Brain: a Journal of Neurology
https://www.readbyqxmd.com/read/28334242/reciprocal-connections-between-cortex-and-thalamus-contribute-to-retinal-axon-targeting-to-dorsal-lateral-geniculate-nucleus
#10
Yupu Diao, Liyuan Cui, Yuqing Chen, Timothy J Burbridge, Wenqi Han, Brunhilde Wirth, Nenad Sestan, Michael C Crair, Jiayi Zhang
The dorsal Lateral Geniculate Nucleus (dLGN) is the primary image-forming target of the retina and shares a reciprocal connection with primary visual cortex (V1). Previous studies showed that corticothalamic input is essential for the development of thalamocortical projections, but less is known about the potential role of this reciprocal connection in the development of retinal projections. Here, we show a deficit of retinal innervation in the dLGN around E18.5 in Tra2β conditional knockout (cKO) "cortexless" mice, an age when apoptosis occurs along the thalamocortical tract and in some dLGN neurons...
March 10, 2017: Cerebral Cortex
https://www.readbyqxmd.com/read/28334225/pom-thalamocortical-input-drives-layer-specific-microcircuits-in-somatosensory-cortex
#11
Nicholas J Audette, Joanna Urban-Ciecko, Megumi Matsushita, Alison L Barth
Higher-order thalamic nuclei, such as the posterior medial nucleus (POm) in the somatosensory system or the pulvinar in the visual system, densely innervate the cortex and can influence perception and plasticity. To systematically evaluate how higher-order thalamic nuclei can drive cortical circuits, we investigated cell-type selective responses to POm stimulation in mouse primary somatosensory (barrel) cortex, using genetically targeted whole-cell recordings in acute brain slices. We find that ChR2-evoked thalamic input selectively targets specific cell types in the neocortex, revealing layer-specific modules for the summation and processing of POm input...
March 10, 2017: Cerebral Cortex
https://www.readbyqxmd.com/read/28333385/functioning-of-circuits-connecting-thalamus-and-cortex
#12
S Murray Sherman
Glutamatergic pathways in thalamus and cortex are divided into two distinct classes: driver, which carries the main information between cells, and modulator, which modifies how driver inputs function. Identifying driver inputs helps to reveal functional computational circuits, and one set of such circuits identified by this approach are cortico-thalamo-cortical (or transthalamic corticocortical) circuits. This, in turn, leads to the conclusion that there are two types of thalamic relay: first order nuclei (such as the lateral geniculate nucleus) that relay driver input from a subcortical source (i...
March 16, 2017: Comprehensive Physiology
https://www.readbyqxmd.com/read/28333372/characterisation-and-functional-mapping-of-surface-potentials-in-the-rat-dorsal-column-nuclei
#13
Alastair J Loutit, Ted Maddess, Stephen J Redmond, John W Morley, Greg J Stuart, Jason R Potas
The brainstem dorsal column nuclei (DCN) play a role in early processing of somatosensory information arising from a variety of functionally distinct peripheral structures, before being transmitted to the cortex via the thalamus. To improve our understanding of how sensory information is represented by the DCN, we characterised and mapped low- (<200 Hz) and high-frequency (550-3300 Hz) components of nerve-evoked DCN surface potentials. DCN surface potentials were evoked by electrical stimulation of the left and right nerves innervating cutaneous (sural nerve), or a mix of cutaneous and deep structures (peroneal nerve), in 8 week-old urethane anaesthetised male Wistar rats...
March 23, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/28331874/the-importance-of-constructive-feedback-implications-of-top-down-regulation-in-the-development-of-neural-circuits
#14
Andrew D Thompson, Chinfei Chen
Neural circuits in sensory pathways develop through a general strategy of overproduction of synapses followed by activity-driven pruning to fine-tune connectivity for optimal function. The early visual pathway, consisting of the retina → visual thalamus → primary visual cortex, has served for decades as a powerful model system for probing the mechanisms and logic of this process. In addition to these feedforward projections, the early visual pathway also includes a substantial feedback component in the form of corticothalamic projections from the deepest layer of primary visual cortex...
2017: Neurogenesis (Austin, Tex.)
https://www.readbyqxmd.com/read/28331801/anatomical-brain-difference-of-subthreshold-depression-in-young-and-middle-aged-individuals
#15
Jing Li, Zengjian Wang, JiWon Hwang, Bingcong Zhao, Xinjing Yang, Suicheng Xin, Yu Wang, Huili Jiang, Peng Shi, Ye Zhang, Xu Wang, Courtney Lang, Joel Park, Tuya Bao, Jian Kong
BACKGROUND: Subthreshold depression (StD) is associated with substantial functional impairments due to depressive symptoms that do not fully meet the diagnosis of major depressive disorder (MDD). Its high incidence in the general population and debilitating symptoms has recently put it at the forefront of mood disorder research. AIM: In this study we investigated common volumetric brain changes in both young and middle-aged StD patients. METHODS: Two cohorts of StD patients, young and middle-aged, (n = 57) and matched controls (n = 76) underwent voxel-based morphometry (VBM)...
2017: NeuroImage: Clinical
https://www.readbyqxmd.com/read/28331800/altered-functional-brain-connectivity-in-patients-with-visually-induced-dizziness
#16
Angelique Van Ombergen, Lizette Heine, Steven Jillings, R Edward Roberts, Ben Jeurissen, Vincent Van Rompaey, Viviana Mucci, Stefanie Vanhecke, Jan Sijbers, Floris Vanhevel, Stefan Sunaert, Mohamed Ali Bahri, Paul M Parizel, Paul H Van de Heyning, Steven Laureys, Floris L Wuyts
BACKGROUND: Vestibular patients occasionally report aggravation or triggering of their symptoms by visual stimuli, which is called visually induced dizziness (VID). These patients therefore experience dizziness, discomfort, disorientation and postural unsteadiness. The underlying pathophysiology of VID is still poorly understood. OBJECTIVE: The aim of the current explorative study was to gain a first insight in the underlying neural aspects of VID. METHODS: We included 10 VID patients and 10 healthy matched controls, all of which underwent a resting state fMRI scan session...
2017: NeuroImage: Clinical
https://www.readbyqxmd.com/read/28331016/brain-wide-maps-of-fos-expression-during-fear-learning-and-recall
#17
Jin-Hyung Cho, Sam D Rendall, Jesse M Gray
Fos induction during learning labels neuronal ensembles in the hippocampus that encode a specific physical environment, revealing a memory trace. In the cortex and other regions, the extent to which Fos induction during learning reveals specific sensory representations is unknown. Here we generate high-quality brain-wide maps of Fos mRNA expression during auditory fear conditioning and recall in the setting of the home cage. These maps reveal a brain-wide pattern of Fos induction that is remarkably similar among fear conditioning, shock-only, tone-only, and fear recall conditions, casting doubt on the idea that Fos reveals auditory-specific sensory representations...
April 2017: Learning & Memory
https://www.readbyqxmd.com/read/28331010/presynaptic-and-extrasynaptic-regulation-of-posterior-nucleus-of-thalamus
#18
Anthony Park, Ying Li, Radi Masri, Asaf Keller
The posterior nucleus of thalamus (PO) is a higher-order nucleus involved in sensorimotor processing, including nociception. An important characteristic of PO is its wide range of activity profiles that vary across states of arousal, thought to underlie differences in somatosensory perception subject to attention and degree of consciousness. Further, PO loses the ability to down-regulate its activity level in some forms of chronic pain, suggesting that regulatory mechanisms underlying the normal modulation of PO activity may be pathologically altered...
March 22, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/28329845/spatiotemporal-progression-and-remission-of-lesions-in-the-rat-brain-following-acute-intoxication-with-diisopropylfluorophosphate
#19
Sílvia Sisó, Brad A Hobson, Danielle J Harvey, Donald A Bruun, Douglas J Rowland, Joel R Garbow, Pamela J Lein
Similar to organophosphate (OP) nerve agents, diisopropylfluorophosphate (DFP) rapidly and irreversibly inhibits acetylcholinesterase, leading to convulsions that can progress to status epilepticus (SE). However, in contrast to the OP nerve agents, the long-term consequences of DFP-induced SE are not well known. Thus, we characterized the spatiotemporal profile of neuropathology during the first two months following acute DFP intoxication. Adult, male Sprague Dawley rats administered pyridostigmine bromide (0...
March 7, 2017: Toxicological Sciences: An Official Journal of the Society of Toxicology
https://www.readbyqxmd.com/read/28328739/effects-of-a-brief-cognitive-behavioural-therapy-group-intervention-on-baseline-brain-perfusion-in-adolescents-with-major-depressive-disorder
#20
Zrinka Sosic-Vasic, Birgit Abler, Georg Grön, Paul Plener, Joana Straub
A number of neuroimaging studies have identified altered regional cerebral blood flow (rCBF) related to major depressive disorder (MDD) in adult samples, particularly in the lateral prefrontal, cingular and temporal regions. In contrast, neuroimaging investigations in adolescents with MDD are rare, although investigating young patients during a significant period of brain maturation might offer valuable insights into the neural mechanisms of MDD. We acquired perfusion images obtained with continuous arterial spin labelling in 21 medication-naive adolescents with MDD before and after a five-session cognitive behavioural group therapy (group CBT)...
March 21, 2017: Neuroreport
keyword
keyword
47829
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"