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https://www.readbyqxmd.com/read/29033804/second-language-word-learning-through-repetition-and-imitation-functional-networks-as-a-function-of-learning-phase-and-language-distance
#1
Ladan Ghazi-Saidi, Ana Ines Ansaldo
Introduction and Aim: Repetition and imitation are among the oldest second language (L2) teaching approaches and are frequently used in the context of L2 learning and language therapy, despite some heavy criticism. Current neuroimaging techniques allow the neural mechanisms underlying repetition and imitation to be examined. This fMRI study examines the influence of verbal repetition and imitation on network configuration. Integration changes within and between the cognitive control and language networks were studied, in a pair of linguistically close languages (Spanish and French), and compared to our previous work on a distant language pair (Ghazi-Saidi et al...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/29033793/from-serotonin-to-neuroplasticity-evolvement-of-theories-for-major-depressive-disorder
#2
REVIEW
Bangshan Liu, Jin Liu, Mi Wang, Yan Zhang, Lingjiang Li
The serotonin (5-HT) hypothesis of depression has played an important role in the history of psychiatry, yet it has also been criticized for the delayed onset and inadequate efficacy of selective serotonin reuptake inhibitors (SSRIs). With evolvement of neuroscience, the neuroplasticity hypothesis of major depressive disorder (MDD) has been proposed and may provide a better framework for clarification the pathogenesis of MDD and antidepressant efficacy. In this article, we first summarized the evidence challenging the monoamine hypothesis and proposed that the antidepressant efficacy of SSRIs is not derived from elevated monoamine (5-HT, noradrenaline (NE), or dopamine (DA)) concentration or monoamine neurotransmission...
2017: Frontiers in Cellular Neuroscience
https://www.readbyqxmd.com/read/29027544/long-term-effects-of-exercise-and-physical-therapy-in-people-with-parkinson-disease
#3
REVIEW
Margaret K Mak, Irene S Wong-Yu, Xia Shen, Chloe L Chung
Parkinson disease (PD) is a progressive, neurodegenerative movement disorder with symptoms reflecting various impairments and functional limitations, such as postural instability, gait disturbance, immobility and falls. In addition to pharmacological and surgical management of PD, exercise and physical therapy interventions are also being actively researched. This Review provides an overview of the effects of PD on physical activity - including muscle weakness, reduced aerobic capacity, gait impairment, balance disorders and falls...
October 13, 2017: Nature Reviews. Neurology
https://www.readbyqxmd.com/read/29024676/perinatal-fluoxetine-prevents-the-effect-of-pre-gestational-maternal-stress-on-5-ht-in-the-pfc-but-maternal-stress-has-enduring-effects-on-mpfc-synaptic-structure-in-offspring
#4
Mary Gemmel, Nikolaos Kokras, Christina Dalla, Jodi L Pawluski
Maternal affective disorders are frequently treated with selective serotonin reuptake inhibitor medications (SSRIs); with up to 10% of women being prescribed these medications during pregnancy. Infant development depends on the early serotonergic environment, which is altered by perinatal SSRIs, raising concern about how these medications affect neural outcomes. While clinical and preclinical research suggests an impact of SSRIs on the developing brain, more research is needed to determine the effects on neuroplasticity, the serotonergic system, and the hypothalamic-pituitary-adrenal axis in neural regions mediating behavior...
October 9, 2017: Neuropharmacology
https://www.readbyqxmd.com/read/29021765/enhancing-neuroplasticity-to-augment-cognitive-remediation-in-schizophrenia
#5
REVIEW
Carol Jahshan, Yuri Rassovsky, Michael F Green
There is a burgeoning need for innovative treatment strategies to improve the cognitive deficits in schizophrenia. Cognitive remediation (CR) is effective at the group level, but the variability in treatment response is large. Given that CR may depend on intact neuroplasticity to produce cognitive gains, it is reasonable to combine it with strategies that harness patients' neuroplastic potential. In this review, we discuss two non-pharmacological approaches that can enhance neuroplasticity and possibly augment the effects of CR in schizophrenia: physical exercise and transcranial direct current stimulation (tDCS)...
2017: Frontiers in Psychiatry
https://www.readbyqxmd.com/read/29019708/effects-of-long-term-exercise-and-low-level-inhibition-of-gabaergic-synapses-on-motor-control-and-the-expression-of-bdnf-in-the-motor-related-cortex
#6
Takahiro Inoue, Shuta Ninuma, Masataka Hayashi, Akane Okuda, Tadayoshi Asaka, Hiroshi Maejima
Objectives Brain-derived neurotrophic factor (BDNF) plays important roles in neuroplasticity in the brain. The objective of this study was to examine the effects of long-term exercise combined with low-level inhibition of GABAergic synapses on motor control and the expression of BDNF in the motor-related cortex. Methods ICR mice were divided into four groups based on the factors exercise and GABAA receptor inhibition. We administered the GABAA receptor antagonist bicuculline intraperitoneally (0.25 mg/kg)...
October 11, 2017: Neurological Research
https://www.readbyqxmd.com/read/29017139/do-serum-bdnf-levels-vary-in-self-harm-behavior-among-adolescents-and-are-they-correlated-with-traumatic-experiences
#7
Canem Kavurma, Fatma Varol Tas, Burcu Serim Demirgoren, Ferhat Demirci, Pınar Akan, Damla Eyuboglu, Taner Guvenir
The aim of this study was to compare serum brain-derived neurotrophic factor (BDNF) levels between adolescents that harm themselves, those that receive psychiatric treatment but do not harm themselves, healthy adolescents, and childhood traumas and to investigate the relationship between traumatic experiences and serum BDNF levels. The cases were divided into two groups of 40 adolescents exhibiting self-harm behavior (self-harm/diagnosed group) and 30 adolescents receiving psychiatric treatment but not exhibiting self-harm behaviors (non self-harm/diagnosed group)...
September 28, 2017: Psychiatry Research
https://www.readbyqxmd.com/read/28993717/plasticity-may-change-inputs-as-well-as-processes-structures-and-responses
#8
Lisa M Oakes
Significant work has documented neuroplasticity in development, demonstrating that developmental pathways are shaped by experience. Plasticity is often discussed in terms of the results of differences in input; differences in brain structures, processes, or responses reflect differences in experience. In this paper, I discuss how developmental plasticity also effectively changes input into the system. That is, structures and processes change in response to input, and those changed structures and processes influence future inputs...
April 2017: Cognitive Development
https://www.readbyqxmd.com/read/28989984/hippocampal-volume-changes-following-electroconvulsive-therapy-a-systematic-review-and-meta-analysis
#9
Samuel T Wilkinson, Gerard Sanacora, Michael H Bloch
INTRODUCTION: Reduced hippocampal volume is one of the most consistent morphological findings in Major Depressive Disorder (MDD). Electroconvulsive therapy (ECT) is the most effective therapy for MDD, yet its mechanism of action remains poorly understood. Animal models show that ECT induces several neuroplastic processes, which lead to hippocampal volume increases. We conducted a meta-analysis of ECT studies in humans to investigate its effects on hippocampal volume. METHODS: PubMed was searched for studies examining hippocampal volume before and after ECT...
May 2017: Biological Psychiatry: Cognitive Neuroscience and Neuroimaging
https://www.readbyqxmd.com/read/28988851/ablation-of-c-fibers-decreases-quantal-size-of-gabaergic-synaptic-transmission-in-the-insular-cortex
#10
Shota Murayama, Kiyofumi Yamamoto, Mari Kaneko, Bunnai Ogiso, Masayuki Kobayashi
The primary sensory cortex exhibits neuroplastic changes responding to sensory disturbances, and GABAergic synaptic transmission plays a critical role in the regulation of plasticity. The insular cortex (IC) integrates orofacial nociceptive signals conveyed via myelinated Aδ- and unmyelinated C-fibers. However, it has been unknown whether a disturbance of nociceptive inputs, such as a deletion of the peripheral nerves, alters GABAergic local circuit in IC. The present study elucidated GABAergic synaptic transmission in the model rat whose C-fibers were ablated by capsaicin injection 1-2 days after birth...
October 6, 2017: Neuroscience
https://www.readbyqxmd.com/read/28988614/neuroadaptive-changes-in-metabotropic-glutamate-mglu2-3r-expression-during-different-phases-of-cocaine-addiction-in-rats
#11
Lucyna Pomierny-Chamiolo, Joanna Miszkiel, Malgorzata Frankowska, Józef Mizera, Malgorzata Filip
BACKGROUND: In the cocaine addiction the development from transient into persistent neuroplastic changes strongly involves the glutamatergic system. In this respect, among glutamatergic receptors special attention is paid to the group II of metabotropic glutamatergic receptors (mGlu2/3R) which are involved in the transition from drug use to drug addiction including the relapse mechanisms. METHODS: The present study employed radioligand binding and Western blot assays to study mGlu2/3R density, affinity and protein expression in selected rat brain areas after cocaine self-administration, extinction training and cocaine-induced reinstatement...
April 27, 2017: Pharmacological Reports: PR
https://www.readbyqxmd.com/read/28984724/neuro-ophthalmic-manifestations-of-cerebrovascular-accidents
#12
REVIEW
Alaa S Bou Ghannam, Prem S Subramanian
PURPOSE OF REVIEW: Ocular functions can be affected in almost any type of cerebrovascular accident (CVA) creating a burden on the patient and family and limiting functionality. The present review summarizes the different ocular outcomes after stroke, divided into three categories: vision, ocular motility, and visual perception. We also discuss interventions that have been proposed to help restore vision and perception after CVA. RECENT FINDINGS: Interventions that might help expand or compensate for visual field loss and visuospatial neglect include explorative saccade training, prisms, visual restoration therapy (VRT), and transcranial direct current stimulation (tDCS)...
November 2017: Current Opinion in Ophthalmology
https://www.readbyqxmd.com/read/28984621/the-effects-of-exercise-on-cognitive-function-and-brain-plasticity-a-feasibility-trial
#13
Joyce Gomes-Osman, Danylo F Cabral, Carrie Hinchman, Ali Jannati, Timothy P Morris, Alvaro Pascual-Leone
BACKGROUND: Exercise-mediated cognitive improvements can be at least partly attributed to neuroplastic changes in the nervous system, and may be influenced by the Val66Met polymorphism of the brain-derived neurotrophic factor (BDNF) gene. Transcranial magnetic stimulation (TMS) can be used to assess mechanisms of plasticity in humans noninvasively. OBJECTIVES: To assess the feasibility of evaluating the effects of short-term regular exercise on cognitive performance, and to evaluate the relationship between these effects, TMS measures of plasticity, and BDNF Met carrier status in young healthy sedentary adults...
2017: Restorative Neurology and Neuroscience
https://www.readbyqxmd.com/read/28982677/inhibiting-histone-deacetylase-2-hdac2-promotes-functional-recovery-from-stroke
#14
Ying Tang, Yu-Hui Lin, Huan-Yu Ni, Jian Dong, Hong-Jin Yuan, Yu Zhang, Hai-Ying Liang, Meng-Cheng Yao, Qi-Gang Zhou, Hai-Yin Wu, Lei Chang, Chun-Xia Luo, Dong-Ya Zhu
BACKGROUND: Stroke is a leading cause of long-term disability worldwide. However, current therapies that promote functional recovery from stroke are limited to physical rehabilitation. No pharmacological therapy is available. Thus, understanding the role of histone deacetylase 2 (HDAC2) in the pathophysiological process of stroke-induced functional loss may provide a novel strategy for stroke recovery. METHODS AND RESULTS: Focal stroke was induced by photothrombosis...
October 5, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/28982626/long-term-effects-of-early-environment-on-the-brain-lesson-from-rodent-models
#15
REVIEW
Matteo Di Segni, Diego Andolina, Rossella Ventura
The postnatal period is characterized by extensive neuronal plasticity, synaptic organization, and remodeling. High neuroplasticity renders the brain sensitive to the remodeling effects induced by environmental factors, such as exposure to adversity, which can imprint neurochemical, neuroendocrine, morphological, and behavioral changes. Early experiences that influence developmental trajectories during maturation of the brain can have a wide range of long-lasting effects, modulating stress-coping strategies in adult life and inducing vulnerability or resilience to psychopathologies, depending on the gene×later experience interplay...
October 7, 2017: Seminars in Cell & Developmental Biology
https://www.readbyqxmd.com/read/28981594/neuron-targeted-caveolin-1-promotes-ultrastructural-and-functional-hippocampal-synaptic-plasticity
#16
Junji Egawa, Alice Zemljic-Harpf, Chitra D Mandyam, Ingrid R Niesman, Larisa V Lysenko, Alexander M Kleschevnikov, David M Roth, Hemal H Patel, Piyush M Patel, Brian P Head
A delicate interneuronal communication between pre- and postsynaptic membranes is critical for synaptic plasticity and the formation of memory. Evidence shows that membrane/lipid rafts (MLRs), plasma membrane microdomains enriched in cholesterol and sphingolipids, organize presynaptic proteins and postsynaptic receptors necessary for synaptic formation and signaling. MLRs establish a cell polarity that facilitates transduction of extracellular cues to the intracellular environment. Here we show that neuron-targeted overexpression of an MLR protein, caveolin-1 (SynCav1), in the adult mouse hippocampus increased the number of presynaptic vesicles per bouton, total excitatory type I glutamatergic synapses, number of same-dendrite multiple-synapse boutons, increased myelination, increased long-term potentiation, and increased MLR-localized N-methyl-d-aspartate receptor subunits (GluN1, GluN2A, and GluN2B)...
July 31, 2017: Cerebral Cortex
https://www.readbyqxmd.com/read/28977718/sustained-cell-body-reactivity-and-loss-of-neun-in-a-subset-of-axotomized-bulbospinal-neurons-after-a-chronic-high-cervical-spinal-cord-injury
#17
Fannie Darlot, Stéphane Vinit, Valéry Matarazzo, Anne Kastner
Following central nervous system lesion, the ability of injured axons to regrowth may depend on the level and duration of the injured cell body response (CBR). Therefore, in order to investigate whether axotomized brainstem neurons maintain a durable growth-competent state after spinal cord injury, we studied the effect of a chronic C2 hemisection in rats on the expression of various CBR markers involved in axon regeneration, such as c-Jun, ATF-3, HSP27, NO synthase (NOS), and also of the neural mature phenotype marker NeuN, in the bulbospinal respiratory neurons as compared to the Gigantocellularis nucleus...
October 4, 2017: European Journal of Neuroscience
https://www.readbyqxmd.com/read/28971481/transcranial-magnetic-stimulation-studies-in-complex-regional-pain-syndrome-type-i-a-review
#18
REVIEW
R Nardone, F Brigo, Y Höller, L Sebastianelli, V Versace, L Saltuari, P Lochner, E Trinka
The sensory and motor cortical representation corresponding to the affected limb is altered in patients with complex regional pain syndrome (CRPS). Transcranial magnetic stimulation (TMS) represents a useful non-invasive approach for studying cortical physiology. If delivered repetitively, TMS can also modulate cortical excitability and induce long-lasting neuroplastic changes. In this review, we performed a systematic search of all studies using TMS to explore cortical excitability/plasticity and repetitive TMS (rTMS) for the treatment of CRPS...
October 3, 2017: Acta Neurologica Scandinavica
https://www.readbyqxmd.com/read/28969326/thinking-fast-and-slow-highlights-from-the-2016-bja-seminar-on-anaesthetic-neurotoxicity-and-neuroplasticity
#19
S G Soriano, L Vutskits, V Jevtovic-Todorovic, H C Hemmings
No abstract text is available yet for this article.
September 1, 2017: British Journal of Anaesthesia
https://www.readbyqxmd.com/read/28968740/activity-dependent-neuroplasticity-induced-by-an-enriched-environment-reverses-cognitive-deficits-in-scribble-deficient-mouse
#20
Muna L Hilal, Maité M Moreau, Claudia Racca, Vera L Pinheiro, Nicolas H Piguel, Marie-Josée Santoni, Steve Dos Santos Carvalho, Jean-Michel Blanc, Yah-Se K Abada, Ronan Peyroutou, Chantal Medina, Hélène Doat, Thomas Papouin, Laurent Vuillard, Jean-Paul Borg, Rivka Rachel, Aude Panatier, Mireille Montcouquiol, Stéphane H R Oliet, Nathalie Sans
Planar cell polarity (PCP) signaling is well known to play a critical role during prenatal brain development; whether it plays specific roles at postnatal stages remains rather unknown. Here, we investigated the role of a key PCP-associated gene scrib in CA1 hippocampal structure and function at postnatal stages. We found that Scrib is required for learning and memory consolidation in the Morris water maze as well as synaptic maturation and NMDAR-dependent bidirectional plasticity. Furthermore, we unveiled a direct molecular interaction between Scrib and PP1/PP2A phosphatases whose levels were decreased in postsynaptic density of conditional knock-out mice...
November 22, 2016: Cerebral Cortex
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