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Brain Sciences

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https://www.readbyqxmd.com/read/28218643/diffusion-assessment-of-cortical-changes-induced-by-traumatic-spinal-cord-injury
#1
Peng Sun, Rory K J Murphy, Paul Gamble, Ajit George, Sheng-Kwei Song, Wilson Z Ray
Promising treatments are being developed to promote functional recovery after spinal cord injury (SCI). Magnetic resonance imaging, specifically Diffusion Tensor Imaging (DTI) has been shown to non-invasively measure both axonal and myelin integrity following traumatic brain and SCI. A novel data-driven model-selection algorithm known as Diffusion Basis Spectrum Imaging (DBSI) has been proposed to more accurately delineate white matter injury. The objective of this study was to investigate whether DTI/DBSI changes that extend to level of the cerebral peduncle and internal capsule following a SCI could be correlated with clinical function...
February 17, 2017: Brain Sciences
https://www.readbyqxmd.com/read/28212278/the-effect-of-the-human-peptide-ghk-on-gene-expression-relevant-to-nervous-system-function-and-cognitive-decline
#2
Loren Pickart, Jessica Michelle Vasquez-Soltero, Anna Margolina
Neurodegeneration, the progressive death of neurons, loss of brain function, and cognitive decline is an increasing problem for senior populations. Its causes are poorly understood and therapies are largely ineffective. Neurons, with high energy and oxygen requirements, are especially vulnerable to detrimental factors, including age-related dysregulation of biochemical pathways caused by altered expression of multiple genes. GHK (glycyl-l-histidyl-l-lysine) is a human copper-binding peptide with biological actions that appear to counter aging-associated diseases and conditions...
February 15, 2017: Brain Sciences
https://www.readbyqxmd.com/read/28208604/reducing-fall-risk-with-combined-motor-and-cognitive-training-in-elderly-fallers
#3
Francesco Barban, Roberta Annicchiarico, Matteo Melideo, Alessia Federici, Maria Giovanna Lombardi, Simone Giuli, Claudia Ricci, Fulvia Adriano, Ivo Griffini, Manuel Silvestri, Massimo Chiusso, Sergio Neglia, Sergio Ariño-Blasco, Raquel Cuevas Perez, Yannis Dionyssiotis, Georgios Koumanakos, Milo Kovačeić, Nuria Montero-Fernández, Oscar Pino, Niels Boye, Ulises Cortés, Cristian Barrué, Atia Cortés, Peter Levene, Stelios Pantelopoulos, Roberto Rosso, José Antonio Serra-Rexach, Angelo Maria Sabatini, Carlo Caltagirone
BACKGROUND: Falling is a major clinical problem in elderly people, demanding effective solutions. At present, the only effective intervention is motor training of balance and strength. Executive function-based training (EFt) might be effective at preventing falls according to evidence showing a relationship between executive functions and gait abnormalities. The aim was to assess the effectiveness of a motor and a cognitive treatment developed within the EU co-funded project I-DONT-FALL...
February 10, 2017: Brain Sciences
https://www.readbyqxmd.com/read/28208601/surgical-neurostimulation-for-spinal-cord-injury
#4
REVIEW
Aswin Chari, Ian D Hentall, Marios C Papadopoulos, Erlick A C Pereira
Traumatic spinal cord injury (SCI) is a devastating neurological condition characterized by a constellation of symptoms including paralysis, paraesthesia, pain, cardiovascular, bladder, bowel and sexual dysfunction. Current treatment for SCI involves acute resuscitation, aggressive rehabilitation and symptomatic treatment for complications. Despite the progress in scientific understanding, regenerative therapies are lacking. In this review, we outline the current state and future potential of invasive and non-invasive neuromodulation strategies including deep brain stimulation (DBS), spinal cord stimulation (SCS), motor cortex stimulation (MCS), transcutaneous direct current stimulation (tDCS) and repetitive transcranial magnetic stimulation (rTMS) in the context of SCI...
February 10, 2017: Brain Sciences
https://www.readbyqxmd.com/read/28208764/spatial-impairment-and-memory-in-genetic-disorders-insights-from-mouse-models
#5
Sang Ah Lee, Valter Tucci, Giorgio Vallortigara
Research across the cognitive and brain sciences has begun to elucidate some of the processes that guide navigation and spatial memory. Boundary geometry and featural landmarks are two distinct classes of environmental cues that have dissociable neural correlates in spatial representation and follow different patterns of learning. Consequently, spatial navigation depends both on the type of cue available and on the type of learning provided. We investigated this interaction between spatial representation and memory by administering two different tasks (working memory, reference memory) using two different environmental cues (rectangular geometry, striped landmark) in mouse models of human genetic disorders: Prader-Willi syndrome (PWScr(m+/p-) mice, n = 12) and Beta-catenin mutation (Thr653Lys-substituted mice, n = 12)...
February 9, 2017: Brain Sciences
https://www.readbyqxmd.com/read/28178176/nlrp12-inflammasome-expression-in-the-rat-brain-in-response-to-lps-during-morphine-tolerance
#6
Sulie L Chang, Wenfei Huang, Xin Mao, Sabroni Sarkar
Morphine, an effective but addictive analgesic, can profoundly affect the inflammatory response to pathogens, and long-term use can result in morphine tolerance. Inflammasomes are protein complexes involved in the inflammatory response. The nucleotide-binding oligomerization domain-like receptor (NLR) Family Pyrin Domain Containing (NLRP) 12 (NLRP12) inflammasome has been reported to have anti-inflammatory activity. In this study, we examined the expression of NLRP12 inflammasome related genes in the adult F344 rat brain in response to the bacterial endotoxin lipopolysaccharide (LPS) in the presence and absence of morphine tolerance...
February 6, 2017: Brain Sciences
https://www.readbyqxmd.com/read/28165364/inhibitory-control-under-threat-the-role-of-spontaneous-eye-blinks-in-post-traumatic-stress-disorder
#7
Mikael Rubin, Denise A Hien, Dipanjana Das, Robert D Melara
This study is the first to explore spontaneous eye blink rate (sEBR) in individuals with post-traumatic stress disorder (PTSD). We investigated the connection between the magnitude of flanker interference in PTSD participants and sEBR during performance on a modified version of the Eriksen flanker task. As a peripheral measure of cognitive control and dopaminergic function, sEBR may illuminate the relationship between PTSD and executive function. Findings revealed a positive relationship between sEBR and flanker interference in participants diagnosed with PTSD, to both threat-related and neutral stimuli, whereas this relationship was negative in participants exposed to trauma but without PTSD and in healthy controls...
February 4, 2017: Brain Sciences
https://www.readbyqxmd.com/read/28165363/effect-of-experimental-hand-pain-on-training-induced-changes-in-motor-performance-and-corticospinal-excitability
#8
Nicolas Mavromatis, Cécilia Neige, Martin Gagné, Karen T Reilly, Catherine Mercier
Pain influences plasticity within the sensorimotor system and the aim of this study was to assess the effect of pain on changes in motor performance and corticospinal excitability during training for a novel motor task. A total of 30 subjects were allocated to one of two groups (Pain, NoPain) and performed ten training blocks of a visually-guided isometric pinch task. Each block consisted of 15 force sequences, and subjects modulated the force applied to a transducer in order to reach one of five target forces...
February 4, 2017: Brain Sciences
https://www.readbyqxmd.com/read/28124986/the-anterior-prefrontal-cortex-and-the-hippocampus-are-negatively-correlated-during-false-memories
#9
Brittany M Jeye, Jessica M Karanian, Scott D Slotnick
False memories commonly activate the anterior/dorsolateral prefrontal cortex (A/DLPFC) and the hippocampus. These regions are assumed to work in concert during false memories, which would predict a positive correlation between the magnitudes of activity in these regions across participants. However, the A/DLPFC may also inhibit the hippocampus, which would predict a negative correlation between the magnitudes of activity in these regions. In the present functional magnetic resonance imaging (fMRI) study, during encoding, participants viewed abstract shapes in the left or right visual field...
January 23, 2017: Brain Sciences
https://www.readbyqxmd.com/read/28124985/a-genetic-based-feature-selection-approach-in-the-identification-of-left-right-hand-motor-imagery-for-a-brain-computer-interface
#10
Charles Yaacoub, Georges Mhanna, Sandy Rihana
Electroencephalography is a non-invasive measure of the brain electrical activity generated by millions of neurons. Feature extraction in electroencephalography analysis is a core issue that may lead to accurate brain mental state classification. This paper presents a new feature selection method that improves left/right hand movement identification of a motor imagery brain-computer interface, based on genetic algorithms and artificial neural networks used as classifiers. Raw electroencephalography signals are first preprocessed using appropriate filtering...
January 23, 2017: Brain Sciences
https://www.readbyqxmd.com/read/28124982/overview-of-traumatic-brain-injury-an-immunological-context
#11
REVIEW
Damir Nizamutdinov, Lee A Shapiro
Traumatic brain injury (TBI) afflicts people of all ages and genders, and the severity of injury ranges from concussion/mild TBI to severe TBI. Across all spectrums, TBI has wide-ranging, and variable symptomology and outcomes. Treatment options are lacking for the early neuropathology associated with TBIs and for the chronic neuropathological and neurobehavioral deficits. Inflammation and neuroinflammation appear to be major mediators of TBI outcomes. These systems are being intensively studies using animal models and human translational studies, in the hopes of understanding the mechanisms of TBI, and developing therapeutic strategies to improve the outcomes of the millions of people impacted by TBIs each year...
January 23, 2017: Brain Sciences
https://www.readbyqxmd.com/read/28106790/contributions-of-letter-speech-sound-learning-and-visual-print-tuning-to-reading-improvement-evidence-from-brain-potential-and-dyslexia-training-studies
#12
REVIEW
Gorka Fraga González, Gojko Žarić, Jurgen Tijms, Milene Bonte, Maurits W van der Molen
We use a neurocognitive perspective to discuss the contribution of learning letter-speech sound (L-SS) associations and visual specialization in the initial phases of reading in dyslexic children. We review findings from associative learning studies on related cognitive skills important for establishing and consolidating L-SS associations. Then we review brain potential studies, including our own, that yielded two markers associated with reading fluency. Here we show that the marker related to visual specialization (N170) predicts word and pseudoword reading fluency in children who received additional practice in the processing of morphological word structure...
January 18, 2017: Brain Sciences
https://www.readbyqxmd.com/read/28098766/single-electrode-deep-brain-stimulation-with-dual-targeting-at-dual-frequency-for-the-treatment-of-chronic-pain-a-case-series-and-review-of-the-literature
#13
REVIEW
Milo Hollingworth, Hugh P Sims-Williams, Anthony E Pickering, Neil Barua, Nikunj K Patel
Deep Brain Stimulation (DBS) has been used to target many deep brain structures for the treatment of chronic pain. The periaqueductal grey and periventricular grey (PAG/PVG) is an effective target but results are variable, sometimes short-lived or subject to tolerance. The centromedian intra-laminar parafascicular complex (CMPf) modulates medial pain pathways and CMPf DBS may address the affective aspects of pain perception. Stimulation of multiple deep brain targets may offer a strategy to optimize management of patients with complex pain symptomatology...
January 13, 2017: Brain Sciences
https://www.readbyqxmd.com/read/28085089/sex-differences-in-neuromuscular-fatigability-of-the-knee-extensors-post-stroke
#14
Meghan Kirking, Reivian Berrios Barillas, Philip Andrew Nelson, Sandra Kay Hunter, Allison Hyngstrom
BACKGROUND AND PURPOSE: Despite the implications of optimizing strength training post-stroke, little is known about the differences in fatigability between men and women with chronic stroke. The purpose of this study was to determine the sex differences in knee extensor muscle fatigability and potential mechanisms in individuals with stroke. METHODS: Eighteen participants (10 men, eight women) with chronic stroke (≥6 months) and 23 (12 men, 11 women) nonstroke controls participated in the study...
January 12, 2017: Brain Sciences
https://www.readbyqxmd.com/read/28085038/acknowledgement-to-reviewers-of-brain-sciences-in-2016
#15
EDITORIAL
Brain Sciences Editorial Office
The editors of Brain Sciences would like to express their sincere gratitude to the following reviewers for assessing manuscripts in 2016.[...].
January 11, 2017: Brain Sciences
https://www.readbyqxmd.com/read/28067785/relationships-between-gat1-and-ptsd-depression-and-substance-use-disorder
#16
Kaitlin E Bountress, Wei Wei, Christina Sheerin, Dongjun Chung, Ananda B Amstadter, Howard Mandel, Zhewu Wang
Post-traumatic stress disorder (PTSD), Major Depressive Disorder (MDD), and Substance Use Disorder (SUD) have large public health impacts. Therefore, researchers have attempted to identify those at greatest risk for these phenotypes. PTSD, MDD, and SUD are in part genetically influenced. Additionally, genes in the glutamate and gamma-aminobutyric acid (GABA) system are implicated in the encoding of emotional and fear memories, and thus may impact these phenotypes. The current study examined the associations of single nucleotide polymorphisms in GAT1 individually, and at the gene level, using a principal components (PC) approach, with PTSD, PTSD comorbid with MDD, and PTSD comorbid with SUD in 486 combat-exposed veterans...
January 5, 2017: Brain Sciences
https://www.readbyqxmd.com/read/28042822/enduring-sexually-dimorphic-impact-of-in-utero-exposure-to-elevated-levels-of-glucocorticoids-on-midbrain-dopaminergic-populations
#17
REVIEW
Glenda E Gillies, Kanwar Virdee, Ilse Pienaar, Felwah Al-Zaid, Jeffrey W Dalley
Glucocorticoid hormones (GCs) released from the fetal/maternal glands during late gestation are required for normal development of mammalian organs and tissues. Accordingly, synthetic glucocorticoids have proven to be invaluable in perinatal medicine where they are widely used to accelerate fetal lung maturation when there is risk of pre-term birth and to promote infant survival. However, clinical and pre-clinical studies have demonstrated that inappropriate exposure of the developing brain to elevated levels of GCs, either as a result of clinical over-use or after stress-induced activation of the fetal/maternal adrenal cortex, is linked with significant effects on brain structure, neurological function and behaviour in later life...
December 30, 2016: Brain Sciences
https://www.readbyqxmd.com/read/28036071/the-interplay-of-hippocampus-and-ventromedial-prefrontal-cortex-in-memory-based-decision-making
#18
REVIEW
Regina A Weilbächer, Sebastian Gluth
Episodic memory and value-based decision making are two central and intensively studied research domains in cognitive neuroscience, but we are just beginning to understand how they interact to enable memory-based decisions. The two brain regions that have been associated with episodic memory and value-based decision making are the hippocampus and the ventromedial prefrontal cortex, respectively. In this review article, we first give an overview of these brain-behavior associations and then focus on the mechanisms of potential interactions between the hippocampus and ventromedial prefrontal cortex that have been proposed and tested in recent neuroimaging studies...
December 29, 2016: Brain Sciences
https://www.readbyqxmd.com/read/28036062/an-unusual-case-of-post-traumatic-headache-complicated-by-intracranial-hypotension
#19
Sara Siavoshi, Carrie Dougherty, Jessica Ailani, Kaustubh Yadwadkar, Frank Berkowitz
We present a case of post-traumatic headache complicated by intracranial hypotension resulting in an acquired Chiari malformation and myelopathy with syringomyelia. This constellation of findings suggest a possible series of events that started with a traumatic cerebral spinal fluid (CSF) leak, followed by descent of the cerebellar tonsils and disruption of CSF circulation that caused spinal cord swelling and syrinx. This unusual presentation of post-traumatic headache highlights the varying presentations and the potential sequelae of intracranial hypotension...
December 29, 2016: Brain Sciences
https://www.readbyqxmd.com/read/28025542/impact-of-spinal-manipulation-on-cortical-drive-to-upper-and-lower-limb-muscles
#20
Heidi Haavik, Imran Khan Niazi, Mads Jochumsen, Diane Sherwin, Stanley Flavel, Kemal S Türker
This study investigates whether spinal manipulation leads to changes in motor control by measuring the recruitment pattern of motor units in both an upper and lower limb muscle and to see whether such changes may at least in part occur at the cortical level by recording movement related cortical potential (MRCP) amplitudes. In experiment one, transcranial magnetic stimulation input-output (TMS I/O) curves for an upper limb muscle (abductor pollicus brevis; APB) were recorded, along with F waves before and after either spinal manipulation or a control intervention for the same subjects on two different days...
December 23, 2016: Brain Sciences
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