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https://www.readbyqxmd.com/read/28088802/interplay-between-cortical-spreading-depolarization-and-seizures
#1
Daniel R Kramer, Tatsuhiro Fujii, Ifije Ohiorhenuan, Charles Y Liu
Cortical spreading depolarization (CSD) is an electrophysiologic phenomenon found mostly in the setting of neurologic injury resulting in the disturbance of ion homeostasis and leading to changes in the local vascular response. The bioelectric etiology of CSD shares similarities to those in epileptic disorders, yet the relationship between seizures and CSD is unclear, with several studies observing cortical depression before, during, and after seizure activity, thus obscuring our understanding of whether CSD activity potentiates or limits seizures and vice versa...
January 14, 2017: Stereotactic and Functional Neurosurgery
https://www.readbyqxmd.com/read/28088795/influence-of-intracranial-air-on-electrode-position-and-clinical-outcomes-following-deep-brain-stimulation-for-parkinson-s-disease
#2
J Nicole Bentley, Zhe Guan, Karen S Cummings, Kelvin L Chou, Parag G Patil
BACKGROUND: The introduction of intracranial air during deep brain stimulation (DBS) surgery is believed to negatively impact targeting accuracy and clinical outcomes. OBJECTIVE: To quantify the relationship between intracranial air (ICA) volumes, targeting accuracy, and clinical outcomes in patients undergoing subthalamic nucleus (STN) DBS for Parkinson's disease. METHODS: ICA in 73 consecutive STN DBS cases (146 leads) was measured by high-resolution CT and correlated with proximal lead bowing, electrode displacement, targeting accuracy, and clinical outcomes at 6 and 12 months...
January 14, 2017: Stereotactic and Functional Neurosurgery
https://www.readbyqxmd.com/read/28088747/decreased-s100b-serum-levels-after-treatment-in-bipolar-patients-in-a-manic-phase
#3
Meng-Chang Tsai, Tiao-Lai Huang
BACKGROUND: Previous studies have suggested that patients with bipolar disorder might have brain damage. The aim of this study was to investigate the serum levels of brain injury biomarkers and S100A10 in bipolar patients in a manic phase, and evaluate the changes in S100B, neuron specific enolase (NSE), heat shock protein 70 (HSP70) and S100A10 after treatment. METHOD: We consecutively enrolled 17 bipolar inpatients in a manic phase and 30 healthy subjects. Serum brain injury biomarkers and S100A10 were measured with assay kits...
January 3, 2017: Comprehensive Psychiatry
https://www.readbyqxmd.com/read/28088732/apelin-13-protects-rat-primary-cortical-glia-neuron-co-culture-against-pentylenetetrazole-induced-toxicity
#4
Taj Pari Kalantaripour, Saeed Esmaeili-Mahani, Vahid Sheibani, Hamid Najafipour, Majid Asadi-Shekaari M
In spite of recent advances in the treatment of epilepsy, up to 35% of people living with the condition do not respond to accessible anti-epileptic drugs (AEDs) and continue to experience regular, devastating and potentially life-threatening seizures. Neuronal death is a significant feature of epilepsy in humans and experimental models. It has been reported that apelin, an endogenous ligand for the angiotensin-1-like receptor (APJ), has anticonvulsive as well as protective effects in some neurodegenerative situations...
January 12, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28088684/changes-in-electroencephalographic-characteristics-and-blood-brain-barrier-permeability-in-wag-rij-rats-with-cortical-dysplasia
#5
Deniz Sahin, Canan Ugur Yilmaz, Nurcan Orhan, Nadir Arican, Mehmet Kaya, Candan Gürses, Nurbay Ates, Bulent Ahishali
PURPOSE: This study investigated the effects of cortical dysplasia (CD) on electrophysiology and blood-brain barrier (BBB) permeability in WAG/Rij rats with genetic absence epilepsy. METHODS: Pregnant WAG/Rij rats were exposed to 145cGy of gamma-irradiation on embryonic day 17 to induce CD. An electroencephalogram was recorded from cortices subdurally in the offspring of the pregnant animals. Horseradish peroxidase (HRP) was used as determinant of BBB permeability...
January 12, 2017: Epilepsy & Behavior: E&B
https://www.readbyqxmd.com/read/28088683/effects-of-protease-activated-receptor-1-inhibition-on-anxiety-and-fear-following-status-epilepticus
#6
Mihail Fedoriuk, Dmytro Isaev, Oleg Krishtal, Gregory L Holmes, Elena Isaeva
Protease-activated receptor 1 (PAR1) is an important contributor to the pathogenesis of a variety of brain disorders associated with a risk of epilepsy development. Using the lithium-pilocarpine model of temporal lobe epilepsy (TLE), we recently showed that inhibition of this receptor during the first ten days after pilocarpine-induced status epilepticus (SE) results in substantial anti-epileptogenic and neuroprotective effects. As PAR1 is expressed in the central nervous system regions of importance for processing emotional reactions, including amygdala and hippocampus, and TLE is frequently associated with a chronic alteration of the functions of these regions, we tested the hypothesis that PAR1 inhibition could modulate emotionally driven behavioral responses of rats experiencing SE...
January 12, 2017: Epilepsy & Behavior: E&B
https://www.readbyqxmd.com/read/28088666/vocal-emotion-decoding-in-the-subthalamic-nucleus-an-intracranial-erp-study-in-parkinson-s-disease
#7
Julie Péron, Olivier Renaud, Claire Haegelen, Lucas Tamarit, Valérie Milesi, Jean-François Houvenaghel, Thibaut Dondaine, Marc Vérin, Paul Sauleau, Didier Grandjean
Using intracranial local field potential (LFP) recordings in patients with Parkinson's disease (PD) undergoing deep brain stimulation (DBS), we explored the electrophysiological activity of the subthalamic nucleus (STN) in response to emotional stimuli in the auditory modality. Previous studies focused on the influence of visual stimuli. To this end, we recorded LFPs within the STN in response to angry, happy, and neutral prosodies in 13 patients with PD who had just undergone implantation of DBS electrodes...
January 12, 2017: Brain and Language
https://www.readbyqxmd.com/read/28088659/altered-cerebral-insulin-response-in-transgenic-mice-expressing-the-epsilon-4-allele-of-the-human-apolipoprotein-e-gene
#8
Marie-Thérèse Traversy, Milène Vandal, Cyntia Tremblay, Marine Tournissac, Ariane Giguère-Rancourt, A David Bennett, Frédéric Calon
Apolipoprotein E epsilon-4 (APOEε4 or APOE4), an allelic variation of the APOE gene, not only increases the risk of developing the late-onset form of Alzheimer's disease (AD), but also influences the outcome of treatment. Indeed, data from clinical studies show that the beneficial effect of insulin on cognition is blunted in APOE4 carriers. To investigate how APOE impacts insulin response, we assessed the effects of an acute insulin injection in APOE3- and APOE4-targeted replacement mice that respectively express the human APOE3 or APOE4 isoform instead of the endogenous murine ApoE protein...
November 30, 2016: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/28088645/towards-solving-the-hard-problem-of-consciousness-the-varieties-of-brain-resonances-and-the-conscious-experiences-that-they-support
#9
Stephen Grossberg
The hard problem of consciousness is the problem of explaining how we experience qualia or phenomenal experiences, such as seeing, hearing, and feeling, and knowing what they are. To solve this problem, a theory of consciousness needs to link brain to mind by modeling how emergent properties of several brain mechanisms interacting together embody detailed properties of individual conscious psychological experiences. This article summarizes evidence that Adaptive Resonance Theory, or ART, accomplishes this goal...
December 6, 2016: Neural Networks: the Official Journal of the International Neural Network Society
https://www.readbyqxmd.com/read/28088642/anti-rage-antibody-selectively-blocks-acute-systemic-inflammatory-responses-to-lps-in-serum-liver-csf-and-striatum
#10
Juciano Gasparotto, Camila Tiefensee Ribeiro, Rafael Calixto Bortolin, Henrique Schaan Fernandes, Alexsander Alves Teixeira, Marcelo Otavio Rodrigues Guasselli, Crepin Aziz Jose O Agani, Natália Cabral Souza, Mateus Grings, Guilhian Leipnitz, Henrique Mautone Gomes, Matheus Augusto de Bittencourt Pasquali, Peter R Dunkley, Phillip W Dickson, José Claudio Fonseca Moreira, Daniel Pens Gelain
Systemic inflammation induces transient or permanent dysfunction in the brain by exposing it to soluble inflammatory mediators. The receptor for advanced glycation endproducts (RAGE) binds to distinct ligands mediating and increasing inflammatory processes. In this study we used an LPS-induced systemic inflammation model in rats to investigate the effect of blocking RAGE in serum, liver, cerebrospinal fluid (CSF) and brain (striatum, prefrontal cortex, ventral tegmental area and substantia nigra). Intraperitoneal injection of RAGE antibody (50 μg/kg) was followed after 1h by a single LPS (5 mg/kg) intraperitoneal injection...
January 11, 2017: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/28088629/induction-of-hypothyroidism-during-early-postnatal-stages-triggers-a-decrease-in-cognitive-performance-by-decreasing-hippocampal-synaptic-plasticity
#11
Paulina Salazar, Pedro Cisternas, Juan Francisco Codocedo, Nibaldo C Inestrosa
Thyroid hormones are vital in the control of multiple body functions, including the correct performance of the brain. Multiple diseases are associated with thyroid gland functioning, including hypothyroidism. To date, little is known regarding the effects of the establishment of this condition at a young age on brain function. Here, we evaluated the effect of hypothyroidism in an early postnatal stage in cognitive abilities with focus on the hippocampus. In our model, hypothyroidism was induced in young rats at 21days of age using 0...
January 11, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28088610/the-effects-of-voluntary-wheel-running-on-neuroinflammatory-status-role-of-monocyte-chemoattractant-protein-1
#12
Lindsay J Spielman, Mehrbod Estaki, Sanjoy Ghosh, Deanna L Gibson, Andis Klegeris
The health benefits of exercise and physical activity (PA) have been well researched and it is widely accepted that PA is crucial for maintaining health. One of the mechanisms by which exercise and PA exert their beneficial effects is through peripheral immune system adaptations. To date, very few studies have looked at the regulation of neuroimmune reactions in response to PA. We studied the effect of voluntary wheel running (VWR) on pro- and anti-inflammatory cytokine levels, patterns of glial cell activation and expression of immune receptors in the brains of female C57BL/6 mice...
January 11, 2017: Molecular and Cellular Neurosciences
https://www.readbyqxmd.com/read/28088578/the-effect-of-long-term-hindlimb-unloading-on-the-expression-of-risk-neurogenes-encoding-elements-of-serotonin-dopaminergic-systems-and-apoptosis-comparison-with-the-effect-of-actual-spaceflight-on-mouse-brain
#13
E A Kulikova, V A Kulikov, N A Sinyakova, A V Kulikov, N K Popova
The study of spaceflight effects on the brain is technically complex concern; complicated by the problem of applying an adequate ground model. The most-widely used experimental model to study the effect of microgravity is the tail-suspension hindlimb unloading model; however, its compliance with the effect of actual spaceflight on the brain is still unclear. We evaluated the effect of one month hindlimb unloading on the expression of genes related to the brain neuroplasticity - brain neutotrophic factors (Gdnf, Cdnf), apoptotic factors (Bcl-xl, Bax), serotonin- and dopaminergic systems (5-HT2A, Maoa, Maob, Th, D1r, Comt), and compared the results with the data obtained on mice that spent one month in spaceflight on Russian biosatellite Bion-M1...
January 11, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28088577/analyze-the-beta-waves-of-electroencephalogram-signals-from-young-musicians-and-non-musicians-in-major-scale-working-memory-task
#14
Chien-Chang Hsu, Ching-Wen Cheng, Yi-Shiuan Chiu
Electroencephalograms can record wave variations in any brain activity. Beta waves are produced when an external stimulus induces logical thinking, computation, and reasoning during consciousness. This work uses the beta wave of major scale working memory N-back tasks to analyze the differences between young musicians and non-musicians. After the feature analysis uses signal filtering, Hilbert-Huang transformation, and feature extraction methods to identify differences, k-means clustering algorithm are used to group them into different clusters...
January 11, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28088559/increased-expression-of-carbon-monoxide-producing-enzymes-in-the-mpoa-after-sexual-experience-in-male-rats
#15
Christopher L Robison, Jenna A McHenry, Elaine M Hull
The hypothalamus contains numerous nuclei involved in the regulation of reproductive, stress, circadian, and homeostatic behaviors, with many of these nuclei concentrated within the preoptic and anterior regions. The gaseous neurotransmitter, nitric oxide (NO), has already been shown to have an important regulatory role within the medial preoptic area (MPOA) of the anterior hypothalamus, where it facilitates sexual behaviors. However, little is known about the role of other gaseous neurotransmitters in this area...
January 11, 2017: Physiology & Behavior
https://www.readbyqxmd.com/read/28088536/targeting-sonic-hedgehog-signaling-in-neurological-disorders
#16
REVIEW
Sita Sharan Patel, Sunil Tomar, Diksha Sharma, Neeraj Mahindroo, Malairaman Udayabanu
Sonic hedgehog (Shh) signaling influences neurogenesis and neural patterning during the development of central nervous system. Dysregulation of Shh signaling in brain leads to neurological disorders like autism spectrum disorder, depression, dementia, stroke, Parkinson's diseases, Huntington's disease, locomotor deficit, epilepsy, demyelinating disease, neuropathies as well as brain tumors. The synthesis, processing and transport of Shh ligand as well as the localization of its receptors and signal transduction in the central nervous system has been carefully reviewed...
January 11, 2017: Neuroscience and Biobehavioral Reviews
https://www.readbyqxmd.com/read/28088535/neurobiological-consequences-of-juvenile-stress-a-gabaergic-perspective-on-risk-and-resilience
#17
REVIEW
Anne Albrecht, Iris Müller, Ziv Ardi, Gürsel Çalışkan, David Gruber, Sebastian Ivens, Menahem Segal, Joachim Behr, Uwe Heinemann, Oliver Stork, Gal Richter-Levin
ALBRECHT, A., MÜLLER, I., ARDI, Z., ÇALIŞKAN, G., GRUBER, D., IVENS, S., SEGAL, M., BEHR, J., HEINEMANN, U., STORK, O., and RICHTER-LEVIN, G. Neurobiological consequences of juvenile stress: a GABAergic perspective on risk and resilience. NEUROSCI BIOBEHAV REV XXX-XXX, 2016. - Childhood adversity is among the most potent risk factors for developing mood and anxiety disorders later in life. Therefore, understanding how stress during childhood shapes and rewires the brain may optimize preventive and therapeutic strategies for these disorders...
January 11, 2017: Neuroscience and Biobehavioral Reviews
https://www.readbyqxmd.com/read/28088503/evidence-for-splice-transcript-variants-of-tmem165-a-gene-involved-in-cdg
#18
Marie-Ange Krzewinski-Recchi, Sven Potelle, Anne Marie-Mir, Dorothée Vicogne, Eudoxie Dulary, Sandrine Duvet, Willy Morelle, Geoffroy de Bettignies, François Foulquier
BACKGROUND: Defects in TMEM165 gene cause a type-II Congenital Disorder of Glycosylation affecting Golgi glycosylation processes. TMEM165 patients exhibit psychomotor retardation, important osteoporosis, scoliosis, irregular epiphyses and thin bone cortex. Human TMEM165 protein is highly conserved in evolution and belongs to the family of UPF0016 membrane proteins which could be an unique group of Ca(2+)/H(+) antiporters regulating Ca(2+) and pH homeostasis and mainly localized in the Golgi apparatus...
January 11, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28088488/average-activity-but-not-variability-is-the-dominant-factor-in-the-representation-of-object-categories-in-the-brain
#19
Hamid Karimi-Rouzbahani, Nasour Bagheri, Reza Ebrahimpour
To categorize the perceived objects, brain utilizes a broad set of its resources and encoding strategies. Yet, it remains elusive how the category information is encoded in the brain. While many classical studies have sought the category information in the across-trials-averaged activity of neurons/neural populations, several recent studies have observed category information also in the within-trial correlated variability of activities between neural populations (i.e. dependent variability). Moreover, other studies have observed that independent variability of activity, which is the variability of the measured neural activity without any influence from correlated variability with other neurons/populations, could also be modulated for improved categorization...
January 11, 2017: Neuroscience
https://www.readbyqxmd.com/read/28088485/semantic-attributes-are-encoded-in-human-electrocorticographic-signals-during-visual-object-recognition
#20
Kyle Rupp, Matthew Roos, Griffin Milsap, Carlos Caceres, Christopher Ratto, Mark Chevillet, Nathan E Crone, Michael Wolmetz
Non-invasive neuroimaging studies have shown that semantic category and attribute information are encoded in neural population activity. Electrocorticography (ECoG) offers several advantages over non-invasive approaches, but the degree to which semantic attribute information is encoded in ECoG responses is not known. We recorded ECoG while patients named objects from 12 semantic categories and then trained high-dimensional encoding models to map semantic attributes to spectral-temporal features of the task-related neural responses...
January 11, 2017: NeuroImage
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