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https://www.readbyqxmd.com/read/28782683/unidirectional-brain-to-muscle-connectivity-reveals-motor-cortex-control-of-leg-muscles-during-stereotyped-walking
#1
Fiorenzo Artoni, Chiara Fanciullacci, Federica Bertolucci, Alessandro Panarese, Scott Makeig, Silvestro Micera, Carmelo Chisari
In lower mammals, locomotion seems to be mainly regulated by subcortical and spinal networks. On the contrary, recent evidence suggests that in humans the motor cortex is also significantly engaged during complex locomotion tasks. However, a detailed understanding of cortical contribution to locomotion is still lacking especially during stereotyped activities. Here, we show that cortical motor areas finely control leg muscle activation during treadmill stereotyped walking. Using a novel technique based on a combination of Reliable Independent Component Analysis, source localization and effective connectivity, and by combining electroencephalographic (EEG) and electromyographic (EMG) recordings in able-bodied adults we were able to examine for the first time cortical activation patterns and cortico-muscular connectivity including information flow direction...
August 4, 2017: NeuroImage
https://www.readbyqxmd.com/read/28768105/exhaled-breath-markers-for-nonimaging-and-noninvasive-measures-for-detection-of-multiple-sclerosis
#2
Yoav Y Broza, Lior Har-Shai, Raneen Jeries, John C Cancilla, Lea Glass-Marmor, Izabella Lejbkowicz, José S Torrecilla, Xuelin Yao, Xinliang Feng, Akimitsu Narita, Klaus Müllen, Ariel Miller, Hossam Haick
Multiple sclerosis (MS) is the most common chronic neurological disease affecting young adults. MS diagnosis is based on clinical characteristics and confirmed by examination of the cerebrospinal fluids (CSF) or by magnetic resonance imaging (MRI) of the brain or spinal cord or both. However, neither of the current diagnostic procedures are adequate as a routine tool to determine disease state. Thus, diagnostic biomarkers are needed. In the current study, a novel approach that could meet these expectations is presented...
August 16, 2017: ACS Chemical Neuroscience
https://www.readbyqxmd.com/read/28761373/chronic-constriction-injury-of-sciatic-nerve-changes-circular-rna-expression-in-rat-spinal-dorsal-horn
#3
Song Cao, Wenwen Deng, Ying Li, Bangyong Qin, Lin Zhang, Shouyang Yu, Peng Xie, Zhi Xiao, Tian Yu
BACKGROUND: Mechanisms of neuropathic pain are still largely unknown. Molecular changes in spinal dorsal horn may contribute to the initiation and development of neuropathic pain. Circular RNAs (circRNAs) have been identified as microRNA sponges and involved in various biological processes, but whether their expression profile changes in neuropathic pain condition is not reported. METHODS: To test whether neuropathic pain influences circRNA expression, we developed a sciatic chronic constriction injury (CCI) model in rats...
2017: Journal of Pain Research
https://www.readbyqxmd.com/read/28743454/convergence-of-primary-sensory-cortex-and-cerebellar-nuclei-pathways-in-the-whisker-system
#4
REVIEW
Carmen B Schäfer, Freek E Hoebeek
To safely maneuver through the environment the brain needs to compare active sensory information with ongoing motor programs. This process occurs at various levels in the brain: at the lower level, i.e., in the spinal cord, reflexes are generated for the most primitive motor responses; at the intermediate level, i.e., in the brainstem, various nuclei co-process sensory- and motor-related inputs; and, at the higher level cerebellum and thalamo-cortical networks individually compute suitable commands for fine-tuned motor output...
July 22, 2017: Neuroscience
https://www.readbyqxmd.com/read/28732686/health-conditions-impact-on-function-health-related-quality-of-life-and-life-satisfaction-following-traumatic-spinal-cord-injury-a-prospective-observational-registry-cohort-study
#5
Carly S Rivers, Nader Fallah, Vanessa K Noonan, David Gt Whitehurst, Carolyn Schwartz, Joel Finkelstein, B Catharine Craven, Karen Ethans, Colleen O'Connell, Catherine Truchon, Chester Ho, A Gary Linassi, Christine Short, Eve Tsai, Brian Drew, Henry Ahn, Marcel F Dvorak, Jérôme Paquet, Michael G Fehlings, Luc Noreau
OBJECTIVE: To analyze relationships among injury, demographic and environmental factors on function, HRQoL and life satisfaction in individuals with traumatic SCI. DESIGN: prospective observational registry cohort study SETTING: 31 acute and rehabilitation SCI centres PARTICIPANTS: Participants (N=340) from the Rick Hansen Spinal Cord Injury Registry (RHSCIR) who were prospectively recruited from 2004-2014 were included. The model cohort included 340 participants: 79...
July 18, 2017: Archives of Physical Medicine and Rehabilitation
https://www.readbyqxmd.com/read/28731189/identification-of-pivotal-genes-and-pathways-for-spinal-cord-injury-via-bioinformatics-analysis
#6
Zonghao Zhu, Qiang Shen, Liang Zhu, Xiaokang Wei
The present study aimed to identify key genes and pathways associated with spinal cord injury (SCI) and subsequently investigate possible therapeutic targets for the condition. The array data of GSE20907 was downloaded from the Gene Expression Omnibus database and 24 gene chips, including 3‑day, 4‑day, 1‑week, 2‑week and 1‑month post‑SCI together with control propriospinal neurons, were used for the analysis. The raw data was normalized and then the differentially expressed genes (DEGs) in the (A) 2‑week post‑SCI group vs...
July 21, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28716636/a-simplified-clinical-prediction-rule-for-prognosticating-independent-walking-after-spinal-cord-injury-a-prospective-study-from-a-canadian-multicenter-spinal-cord-injury-registry
#7
Katharine E Hicks, Yichen Zhao, Nader Fallah, Carly Rivers, Vanessa Noonan, Tova Plashkes, Eugene K Wai, Darren M Roffey, Eve Tsai, Jerome Paquet, Najmedden Attabib, Travis Marion, Henry Ahn, Philippe Phan
BACKGROUND: Context: Traumatic spinal cord injury (SCI) is a debilitating condition with limited treatment options for neurological or functional recovery. The ability to predict the prognosis of walking post-injury with emerging prediction models could aid in rehabilitation strategies and reintegration into the community. PURPOSE: To re-validate an existing clinical prediction model for independent ambulation (van Middendorp et al. 2011) utilising acute and long-term post-injury follow-up data, and to investigate the accuracy of a simplified model using prospectively collected data from a Canadian multicenter SCI database, the Rick Hansen Spinal Cord Injury Registry (RHSCIR)...
July 14, 2017: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/28657334/large-scale-network-analysis-of-whole-brain-resting-state-functional-connectivity-in-spinal-cord-injury-a-comparative-study
#8
Mayank Kaushal, Akinwunmi Oni-Orisan, Gang Chen, Wenjun Li, Jack Leschke, Doug Ward, Benjamin Kalinosky, Matthew Budde, Brain Schmit, Shi-Jiang Li, Vaishnavi Muqeet, Shekar Kurpad
BACKGROUND: Network analysis based on graph theory depicts the brain as a complex network that allows for inspection of overall brain connectivity pattern and calculation of quantifiable network metrics. To date, large-scale network analysis has not been applied to resting-state functional networks in complete spinal cord injury (SCI) patients. OBJECTIVE: To characterize modular reorganization of whole brain into constituent nodes and compare network metrics between SCI and control subjects...
June 28, 2017: Brain Connectivity
https://www.readbyqxmd.com/read/28649492/relationship-between-brainstem-neurodegeneration-and-clinical-impairment-in-traumatic-spinal-cord-injury
#9
Patrick Grabher, Claudia Blaiotta, John Ashburner, Patrick Freund
BACKGROUND: Brainstem networks are pivotal in sensory and motor function and in recovery following experimental spinal cord injury (SCI). OBJECTIVE: To quantify neurodegeneration and its relation to clinical impairment in major brainstem pathways and nuclei in traumatic SCI. METHODS: Quantitative MRI data of 30 chronic traumatic SCI patients (15 with tetraplegia and 15 with paraplegia) and 23 controls were acquired. Patients underwent a full neurological examination...
2017: NeuroImage: Clinical
https://www.readbyqxmd.com/read/28623089/optimal-intrathecal-hyperbaric-bupivacaine-dose-with-opioids-for-cesarean-delivery-a-prospective-double-blinded-randomized-trial
#10
Eiko Onishi, Mamoru Murakami, Keiji Hashimoto, Miho Kaneko
BACKGROUND: Single-shot spinal anesthesia is commonly used for cesarean delivery. Achieving adequate anesthesia throughout surgery needs to be balanced with associated complications. We investigated the optimal dose of intrathecal hyperbaric bupivacaine, co-administered with opioids, for anesthesia for cesarean delivery. METHODS: This prospective, randomized, double-blinded, dose-ranging trial included parturients scheduled to undergo cesarean delivery under spinal anesthesia...
May 2017: International Journal of Obstetric Anesthesia
https://www.readbyqxmd.com/read/28607062/biomechanical-coupling-facilitates-spinal-neural-tube-closure-in-mouse-embryos
#11
Gabriel L Galea, Young-June Cho, Gauden Galea, Matteo A Molè, Ana Rolo, Dawn Savery, Dale Moulding, Lucy H Culshaw, Evanthia Nikolopoulou, Nicholas D E Greene, Andrew J Copp
Neural tube (NT) formation in the spinal region of the mammalian embryo involves a wave of "zippering" that passes down the elongating spinal axis, uniting the neural fold tips in the dorsal midline. Failure of this closure process leads to open spina bifida, a common cause of severe neurologic disability in humans. Here, we combined a tissue-level strain-mapping workflow with laser ablation of live-imaged mouse embryos to investigate the biomechanics of mammalian spinal closure. Ablation of the zippering point at the embryonic dorsal midline causes far-reaching, rapid separation of the elevating neural folds...
June 27, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28594070/labor-delivery-and-anesthesia-experiences-of-women-with-physical-disability
#12
Suzanne C Smeltzer, Amy J Wint, Jeffrey L Ecker, Lisa I Iezzoni
BACKGROUND: Although many women with physical disabilities report poor quality reproductive health care, little research has addressed labor, delivery, and anesthesia experiences of these women. This study was conducted to explore these experiences in women with significant mobility disabilities. METHODS: A qualitative descriptive study was conducted with 22 women from the United States who had delivered newborns within the prior 10 years. All had significant mobility disabilities...
June 8, 2017: Birth
https://www.readbyqxmd.com/read/28582450/spontaneous-low-frequency-bold-signal-variations-from-resting-state-fmri-are-decreased-in-alzheimer-disease
#13
Samaneh Kazemifar, Kathryn Y Manning, Nagalingam Rajakumar, Francisco A Gómez, Andrea Soddu, Michael J Borrie, Ravi S Menon, Robert Bartha
Previous studies have demonstrated altered brain activity in Alzheimer's disease using task based functional MRI (fMRI), network based resting-state fMRI, and glucose metabolism from 18F fluorodeoxyglucose-PET (FDG-PET). Our goal was to define a novel indicator of neuronal activity based on a first-order textural feature of the resting state functional MRI (RS-fMRI) signal. Furthermore, we examined the association between this neuronal activity metric and glucose metabolism from 18F FDG-PET. We studied 15 normal elderly controls (NEC) and 15 probable Alzheimer disease (AD) subjects from the AD Neuroimaging Initiative...
2017: PloS One
https://www.readbyqxmd.com/read/28511992/rna-seq-analyses-reveal-that-cervical-spinal-cords-and-anterior-motor-neurons-from-amyotrophic-lateral-sclerosis-subjects-show-reduced-expression-of-mitochondrial-dna-encoded-respiratory-genes-and-rhtfam-may-correct-this-respiratory-deficiency
#14
Amy C Ladd, David G Brohawn, Ravindar R Thomas, Paula M Keeney, Stuart S Berr, Shaharyar M Khan, Francisco R Portell, Meiram Zh Shakenov, Patrick F Antkowiak, Bijoy Kundu, Nicholas Tustison, James P Bennett
Amyotrophic lateral sclerosis (ALS) is a generally fatal neurodegenerative disease of adults that produces weakness and atrophy due to dysfunction and death of upper and lower motor neurons. We used RNA-sequencing (RNA-seq) to analyze expression of all mitochondrial DNA (mtDNA)-encoded respiratory genes in ALS and CTL human cervical spinal cords (hCSC) and isolated motor neurons. We analyzed with RNA-seq mtDNA gene expression in human neural stem cells (hNSC) exposed to recombinant human mitochondrial transcription factor A (rhTFAM), visualized in 3-dimensions clustered gene networks activated by rhTFAM, quantitated their interactions with other genes and determined their gene ontology (GO) families...
May 13, 2017: Brain Research
https://www.readbyqxmd.com/read/28507514/markovian-analysis-of-the-sequential-behavior-of-the-spontaneous-spinal-cord-dorsum-potentials-induced-by-acute-nociceptive-stimulation-in-the-anesthetized-cat
#15
Mario Martin, Javier Béjar, Gennaro Esposito, Diógenes Chávez, Enrique Contreras-Hernández, Silvio Glusman, Ulises Cortés, Pablo Rudomín
In a previous study we developed a Machine Learning procedure for the automatic identification and classification of spontaneous cord dorsum potentials (CDPs). This study further supported the proposal that in the anesthetized cat, the spontaneous CDPs recorded from different lumbar spinal segments are generated by a distributed network of dorsal horn neurons with structured (non-random) patterns of functional connectivity and that these configurations can be changed to other non-random and stable configurations after the noceptive stimulation produced by the intradermic injection of capsaicin in the anesthetized cat...
2017: Frontiers in Computational Neuroscience
https://www.readbyqxmd.com/read/28505559/a-two-phased-study-on-health-care-professionals-perceptions-of-single-or-multi-use-of-intermittent-catheters
#16
D McClurg, J Coyle, A Long, K Moore, A Cottenden, C May, M Fader
AIMS: This two phase study aimed to explore health care professionals' teaching and prescribing practice related to intermittent catheterisation and to identify their perceptions about the possible implementation of a mixed (single and multi-use) package for intermittent catheterization. INTRODUCTION: Single-use intermittent catheters are the norm in the UK although multi-use is common in some other countries. A recent Cochrane review found no difference in complications, including urinary tract infection rates, between those using single or multi-use catheters...
May 4, 2017: International Journal of Nursing Studies
https://www.readbyqxmd.com/read/28503142/brain-gray-matter-atrophy-after-spinal-cord-injury-a-voxel-based-morphometry-study
#17
Qian Chen, Weimin Zheng, Xin Chen, Lu Wan, Wen Qin, Zhigang Qi, Nan Chen, Kuncheng Li
The aim of this study was to explore possible changes in whole brain gray matter volume (GMV) after spinal cord injury (SCI) using voxel-based morphometry (VBM), and to study their associations with the injury duration, severity, and clinical variables. In total, 21 patients with SCI (10 with complete and 11 with incomplete SCI) and 21 age- and sex-matched healthy controls (HCs) were recruited. The 3D high-resolution T1-weighted structural images of all subjects were obtained using a 3.0 Tesla MRI system. Disease duration and American Spinal Injury Association (ASIA) Scale scores were also obtained from each patient...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28490418/identifying-and-understanding-the-health-information-experiences-and-preferences-of-caregivers-of-individuals-with-either-traumatic-brain-injury-spinal-cord-injury-or-burn-injury-a-qualitative-investigation
#18
Nathan T Coffey, James Cassese, Xinsheng Cai, Steven Garfinkel, Drasti Patel, Rebecca Jones, Dahlia Shaewitz, Ali A Weinstein
BACKGROUND: In order to meet the challenges of caring for an injured person, caregivers need access to health information. However, caregivers often feel that they lack adequate information. Previous studies of caregivers have primarily focused on either their time and emotional burdens or their health outcomes, but the information needs of caregivers have not been thoroughly investigated. OBJECTIVE: The purpose of this investigation was to identify the preferred sources of health information for caregivers supporting individuals with injuries and to explore how access to this information could be improved...
May 10, 2017: Journal of Medical Internet Research
https://www.readbyqxmd.com/read/28485383/validity-of-one-repetition-maximum-predictive-equations-in-men-with-spinal-cord-injury
#19
F Ribeiro Neto, P Guanais, E Dornelas, A C B Coutinho, R R G Costa
STUDY DESIGN: Cross-sectional study. OBJECTIVES: The study aimed (a) to test the cross-validation of current one-repetition maximum (1RM) predictive equations in men with spinal cord injury (SCI); (b) to compare the current 1RM predictive equations to a newly developed equation based on the 4- to 12-repetition maximum test (4-12RM). SETTING: SARAH Rehabilitation Hospital Network, Brasilia, Brazil. METHODS: Forty-five men aged 28...
May 9, 2017: Spinal Cord
https://www.readbyqxmd.com/read/28484370/clustered-protocadherins-are-required-for-building-functional-neural-circuits
#20
Sonoko Hasegawa, Hiroaki Kobayashi, Makiko Kumagai, Hiroshi Nishimaru, Etsuko Tarusawa, Hiro Kanda, Makoto Sanbo, Yumiko Yoshimura, Masumi Hirabayashi, Takahiro Hirabayashi, Takeshi Yagi
Neuronal identity is generated by the cell-surface expression of clustered protocadherin (Pcdh) isoforms. In mice, 58 isoforms from three gene clusters, Pcdhα, Pcdhβ, and Pcdhγ, are differentially expressed in neurons. Since cis-heteromeric Pcdh oligomers on the cell surface interact homophilically with that in other neurons in trans, it has been thought that the Pcdh isoform repertoire determines the binding specificity of synapses. We previously described the cooperative functions of isoforms from all three Pcdh gene clusters in neuronal survival and synapse formation in the spinal cord...
2017: Frontiers in Molecular Neuroscience
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