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https://www.readbyqxmd.com/read/28918435/infant-avoidance-training-alters-cellular-activation-patterns-in-prefronto-limbic-circuits-during-adult-avoidance-learning-ii-cellular-imaging-of-neurons-expressing-the-activity-regulated-cytoskeleton-associated-protein-arc-arg3-1
#1
Nicole Gröger, Anja Mannewitz, Jörg Bock, Susann Becker, Katja Guttmann, Gerd Poeggel, Katharina Braun
Positive and negative feedback learning is essential to optimize behavioral performance. We used the two-way active avoidance (TWA) task as an experimental paradigm for negative feedback learning with the aim to test the hypothesis that neuronal ensembles activate the activity-regulated cytoskeletal (Arc/Arg3.1) protein during different phases of avoidance learning and during retrieval. A variety of studies in humans and other animals revealed that the ability of aversive feedback learning emerges postnatally...
September 16, 2017: Brain Structure & Function
https://www.readbyqxmd.com/read/28917271/cognitive-impairment-and-chemotherapy-a-brief-overview
#2
REVIEW
Milena Vitali, Carla Ida Ripamonti, Fausto Roila, Claudia Proto, Diego Signorelli, Martina Imbimbo, Giulia Corrao, Angela Brissa, Gallucci Rosaria, Filippo de Braud, Marina Chiara Garassino, Giuseppe Lo Russo
Patients with cancer are experiencing long-term survival following chemotherapy, but the treatment may also be associated with short and long-term toxicity, including the possibility of cognitive dysfunction. A literature overview indicated a significant association between chemotherapy and cognitive impairment but prospective longitudinal research is warranted to examine the degree and persisting nature of this decline. Although chemotherapeutic agents are unlikely to cross the blood-brain barrier, it has been alleged that the occurrence of neurotoxicity is linked to the pro-inflammatory cytokine pathways...
October 2017: Critical Reviews in Oncology/hematology
https://www.readbyqxmd.com/read/28917084/evaluation-of-neurodevelopment-of-children-with-congenital-hypothyroidism-by-the-denver-developmental-screening-test
#3
Ayşe Derya Buluş, Esra Tiftik
BACKGROUND: Thyroid hormones are essential for growth and brain development in childhood. Although congenital hypothyroidism (CH) is the most common reason for mental retardation, normal neurological development can be achieved through early and effective treatment. The aim of the present study was to evaluate the neurological development of CH patients aged 24-56 months. METHODS: The study included a total of 116 healthy control subjects and 112 patients aged 24-56 months who were diagnosed with CH during the neonatal period and were being followed up at the Pediatric Endocrinology Department, Keçiören Training and Research Hospital, between 2012 and 2015...
September 16, 2017: Journal of Pediatric Endocrinology & Metabolism: JPEM
https://www.readbyqxmd.com/read/28917059/direct-modulation-of-aberrant-brain-network-connectivity-through-real-time-neurofeedback
#4
Michal Ramot, Sara Kimmich, Javier Gonzalez-Castillo, Vinai Roopchansingh, Haroon Popal, Emily White, Stephen J Gotts, Alex Martin
The existence of abnormal connectivity patterns between resting state networks in neuropsychiatric disorders, including Autism Spectrum Disorder (ASD), has been well established. Traditional treatment methods in ASD are limited, and do not address the aberrant network structure. Using real-time fMRI neurofeedback, we directly trained 3 brain nodes in participants with ASD, in which the aberrant connectivity has been shown to correlate with symptom severity. Desired network connectivity patterns were reinforced in real-time, without participants' awareness of the training taking place...
September 16, 2017: ELife
https://www.readbyqxmd.com/read/28916842/how-interindividual-differences-in-brain-anatomy-shape-reading-accuracy
#5
Arnaud Cachia, Margot Roell, Jean-François Mangin, Zhong Yi Sun, Antoinette Jobert, Lucia Braga, Olivier Houde, Stanislas Dehaene, Grégoire Borst
The capacity to read develops throughout intensive academic learning and training. Several studies have investigated the impact of reading on the brain, and particularly how the anatomy of the brain changes with reading acquisition. In the present study, we investigated the converse issue, namely whether and how reading acquisition is constrained by the anatomy of the brain. Using multimodal MRI, we found that (a) the pattern (continuous or interrupted sulcus) of the posterior part of the left lateral occipito-temporal sulcus (OTS) hosting the visual word form area (VWFA) predicts reading skills in adults; that (b) this effect is modulated by the age of reading acquisition; and that (c) the length of the OTS sulcal interruption is associated with reading skills...
September 15, 2017: Brain Structure & Function
https://www.readbyqxmd.com/read/28916748/%C3%AE-2-adrenoceptor-mediated-inhibition-in-the-central-amygdala-blocks-fear-conditioning
#6
N M Holmes, J W Crane, M Tang, J Fam, R F Westbrook, A J Delaney
The central amygdala is critical for the acquisition and expression of fear memories. This region receives a dense innervation from brainstem noradrenergic cell groups and has a high level of α2-adrenoceptor expression. Using whole-cell electrophysiological recordings from rat brain slices, we characterise the role of pre-synaptic α2-adrenoceptor in modulating discrete inhibitory and excitatory connections within both the lateral and medial division of the central amygdala. The selective α2-adrenoceptor agonist clonidine blocked the excitatory input from the pontine parabrachial neurons onto neurons of the lateral central amygdala...
September 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28916469/activity-changes-in-the-left-superior-temporal-sulcus-reflect-the-effects-of-childcare-training-on-young-female-students-perceptions-of-infants-negative-facial-expressions
#7
Ayahito Ito, Katsuko Niwano, Motoko Tanabe, Yosuke Sato, Toshikatsu Fujii
In many developed countries, the number of infants who experience non-parent childcare is increasing, and the role of preschool teachers is becoming more important. However, little attention has been paid to the effects of childcare training on students who are studying to become preschool teachers. We used functional magnetic resonance imaging (fMRI) to investigate whether and how childcare training affects brain responses to infants' facial expressions among young females studying to become preschool teachers...
September 12, 2017: Neuroscience Research
https://www.readbyqxmd.com/read/28914232/combined-rtms-and-virtual-reality-brain-computer-interface-training-for-motor-recovery-after-stroke
#8
Nessa N Johnson, James Carey, Bradley Edelman, Alexander Doud, Andrew Grande, Kamakshi Lakshminarayan, Bin He
OBJECTIVE: Combining repetitive transcranial magnetic stimulation (rTMS) with brain-computer interface (BCI) training can address motor impairment after stroke by down-regulating exaggerated inhibition from the contralesional hemisphere and encouraging ipsilesional activation. The objective was to evaluate the efficacy of combined rTMS+BCI, compared to sham rTMS+BCI, on motor recovery after stroke in subjects with lasting motor paresis. APPROACH: Three stroke subjects approximately one year post-stroke participated in three weeks of combined rTMS (real or sham) and BCI, followed by three weeks of BCI alone...
September 15, 2017: Journal of Neural Engineering
https://www.readbyqxmd.com/read/28913859/changes-in-frontal-and-posterior-cortical-activity-underlie-the-early-emergence-of-executive-function
#9
Aaron T Buss, John P Spencer
Executive function (EF) is a key cognitive process that emerges in early childhood and facilitates children's ability to control their own behavior. Individual differences in EF skills early in life are predictive of quality-of-life outcomes 30 years later (Moffitt et al., 2011). What changes in the brain give rise to this critical cognitive ability? Traditionally, frontal cortex growth is thought to underlie changes in cognitive control (Bunge & Zelazo, 2006; Moriguchi & Hiraki, 2009). However, more recent data highlight the importance of long-range cortical interactions between frontal and posterior brain regions...
September 15, 2017: Developmental Science
https://www.readbyqxmd.com/read/28913349/brain-computer-interface-for-clinical-purposes-cognitive-assessment-and-rehabilitation
#10
REVIEW
Laura Carelli, Federica Solca, Andrea Faini, Paolo Meriggi, Davide Sangalli, Pietro Cipresso, Giuseppe Riva, Nicola Ticozzi, Andrea Ciammola, Vincenzo Silani, Barbara Poletti
Alongside the best-known applications of brain-computer interface (BCI) technology for restoring communication abilities and controlling external devices, we present the state of the art of BCI use for cognitive assessment and training purposes. We first describe some preliminary attempts to develop verbal-motor free BCI-based tests for evaluating specific or multiple cognitive domains in patients with Amyotrophic Lateral Sclerosis, disorders of consciousness, and other neurological diseases. Then we present the more heterogeneous and advanced field of BCI-based cognitive training, which has its roots in the context of neurofeedback therapy and addresses patients with neurological developmental disorders (autism spectrum disorder and attention-deficit/hyperactivity disorder), stroke patients, and elderly subjects...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28912711/increased-hippocampal-probdnf-contributes-to-memory-impairments-in-aged-mice
#11
Mona Buhusi, Chris Etheredge, Ann-Charlotte Granholm, Catalin V Buhusi
Memory decline during aging or accompanying neurodegenerative diseases, represents a major health problem. Neurotrophins have long been considered relevant to the mechanisms of aging-associated cognitive decline and neurodegeneration. Mature Brain-Derived Neurotrophic Factor (BDNF) and its precursor (proBDNF) can both be secreted in response to neuronal activity and exert opposing effects on neuronal physiology and plasticity. In this study, biochemical analyses revealed that increased levels of proBDNF are present in the aged mouse hippocampus relative to young and that the level of hippocampal proBDNF inversely correlates with the ability to perform in a spatial memory task, the water radial arm maze (WRAM)...
2017: Frontiers in Aging Neuroscience
https://www.readbyqxmd.com/read/28912701/spectral-entropy-can-predict-changes-of-working-memory-performance-reduced-by-short-time-training-in-the-delayed-match-to-sample-task
#12
Yin Tian, Huiling Zhang, Wei Xu, Haiyong Zhang, Li Yang, Shuxing Zheng, Yupan Shi
Spectral entropy, which was generated by applying the Shannon entropy concept to the power distribution of the Fourier-transformed electroencephalograph (EEG), was utilized to measure the uniformity of power spectral density underlying EEG when subjects performed the working memory tasks twice, i.e., before and after training. According to Signed Residual Time (SRT) scores based on response speed and accuracy trade-off, 20 subjects were divided into two groups, namely high-performance and low-performance groups, to undertake working memory (WM) tasks...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28910696/tissue-microstructure-estimation-using-a-deep-network-inspired-by-a-dictionary-based-framework
#13
Chuyang Ye
Diffusion magnetic resonance imaging (dMRI) captures the anisotropic pattern of water displacement in the neuronal tissue and allows noninvasive investigation of the complex tissue microstructure. A number of biophysical models have been proposed to relate the tissue organization with the observed diffusion signals, so that the tissue microstructure can be inferred. The Neurite Orientation Dispersion and Density Imaging (NODDI) model has been a popular choice and has been widely used for many neuroscientific studies...
September 6, 2017: Medical Image Analysis
https://www.readbyqxmd.com/read/28910621/a-fully-automated-approach-to-spike-sorting
#14
Jason E Chung, Jeremy F Magland, Alex H Barnett, Vanessa M Tolosa, Angela C Tooker, Kye Y Lee, Kedar G Shah, Sarah H Felix, Loren M Frank, Leslie F Greengard
Understanding the detailed dynamics of neuronal networks will require the simultaneous measurement of spike trains from hundreds of neurons (or more). Currently, approaches to extracting spike times and labels from raw data are time consuming, lack standardization, and involve manual intervention, making it difficult to maintain data provenance and assess the quality of scientific results. Here, we describe an automated clustering approach and associated software package that addresses these problems and provides novel cluster quality metrics...
September 13, 2017: Neuron
https://www.readbyqxmd.com/read/28906387/a-nearly-full-recovery-from-avm-hemorrhagic-stroke-17-years-after-insult-using-a-new-integrated-neurodevelopmental-approach-a-case-report
#15
Alberto J Friedmann
RATIONAL: With the prevalence of stroke increasing in the USA and the world along with increased survival and longevity due to medical advancements, it has become increasingly necessary to look at the chronic phase of stroke recovery. Previous paradigms of stroke treatment have proven ineffective when looking at 10, 15, or 20 years of survival post insult. PATIENT CONCERNS: The patient, being a young man just out of high school, was concerned with his overall morbidity...
September 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28902466/learning-based-deformable-registration-for-infant-mri-by-integrating-random-forest-with-auto-context-model
#16
Lifang Wei, Xiaohuan Cao, Zhensong Wang, Yaozong Gao, Shunbo Hu, Li Wang, Guorong Wu, Dinggang Shen
PURPOSE: Accurately analyzing the rapid structural evolution of human brain in the first year of life is a key step in early brain development studies, which requires accurate deformable image registration. However, due to 1) dynamic appearance and 2) large anatomical changes, very few methods in the literature can work well for the registration of two infant brain MR images acquired at two arbitrary development phases, such as birth and one-year-old. METHODS: To address these challenging issues, we propose a learning-based registration method, which can handle the anatomical structures and the appearance changes between the two infant brain MR images with possible time gap...
September 13, 2017: Medical Physics
https://www.readbyqxmd.com/read/28902423/partitioning-k-space-for-cylindrical-three-dimensional-rapid-acquisition-with-relaxation-enhancement-imaging-in-the-mouse-brain
#17
T Leigh Spencer Noakes, R Mark Henkelman, Brian J Nieman
Three-dimensional rapid acquisition with relaxation enhancement (RARE) scans require the assignment of each phase encode step in two dimensions to an echo in the echo train. Although this assignment is frequently made across the entire Cartesian grid, collection of only the central cylinder of k-space by eliminating the corners in each phase encode dimension reduces the scan time by ~22% with negligible impact on image quality. The recipe for the assignment of echoes to grid points for such an acquisition is less straightforward than for the simple full Cartesian acquisition case, and has important implications for image quality...
September 13, 2017: NMR in Biomedicine
https://www.readbyqxmd.com/read/28901999/recruitment-of-prefrontal-striatal-circuit-in-response-to-skilled-motor-challenge
#18
Yumei Guo, Zhuo Wang, Sandhya Prathap, Daniel P Holschneider
A variety of physical fitness regimens have been shown to improve cognition, including executive function, yet our understanding of which parameters of motor training are important in optimizing outcomes remains limited. We used functional brain mapping to compare the ability of two motor challenges to acutely recruit the prefrontal-striatal circuit. The two motor tasks - walking in a complex running wheel with irregularly spaced rungs or walking in a running wheel with a smooth internal surface - differed only in the extent of skill required for their execution...
September 8, 2017: Neuroreport
https://www.readbyqxmd.com/read/28901711/learning-to-name-smells-increases-activity-in-heteromodal-semantic-areas
#19
Arnaud Fournel, Caroline Sezille, Carmen C Licon, Charlotte Sinding, Johannes Gerber, Camille Ferdenzi, Thomas Hummel, Moustafa Bensafi
Semantic description of odors is a cognitively demanding task. Learning to name smells is, however, possible with training. This study set out to examine how improvement in olfactory semantic knowledge following training reorganizes the neural representation of smells. First, 19 nonexpert volunteers were trained for 3 days; they were exposed (i) to odorants presented without verbal labels (perceptual learning) and (ii) to other odorants paired with lexicosemantic labels (associative learning). Second, the same participants were tested in a brain imaging study (fMRI) measuring hemodynamic responses to learned odors presented in both the perceptual and associative learning conditions...
September 12, 2017: Human Brain Mapping
https://www.readbyqxmd.com/read/28901676/neural-mechanisms-of-motion-perceptual-learning-in-noise
#20
Nihong Chen, Junshi Lu, Hanyu Shao, Xuchu Weng, Fang Fang
Practice improves our perceptual ability. However, the neural mechanisms underlying this experience-dependent plasticity in adult brain remain unclear. Here, we studied the long-term neural correlates of motion perceptual learning. Subjects' behavioral performance and BOLD signals were tracked before, immediately after, and 2 weeks after practicing a motion direction discrimination task in noise over six daily sessions. Parallel to the specificity and persistency of the behavioral learning effect, we found that training sharpened the cortical tuning in MT, and enhanced the connectivity strength from MT to the intraparietal sulcus (IPS, a motion decision-making area)...
September 12, 2017: Human Brain Mapping
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