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https://www.readbyqxmd.com/read/28937248/theta-burst-stimulation-in-the-treatment-of-chronic-orofacial-pain-a-randomized-controlled-trial
#1
B Kohútová, J Fricová, M Klírová, T Novák, R Rokyta
Theta burst stimulation (TBS) is a modified form of high-frequency repetitive transcranial magnetic stimulation (rTMS) with promising effect in chronic pain. The aim of our double-blind, sham-controlled, parallel-group, randomized study was to assess an efficacy of intermittent TBS (iTBS) in the treatment of patients with chronic orofacial pain. Nineteen patients (twelve females) with chronic orofacial pain were prospectively included and randomly assigned to single session of an active (iTBS) or sham (intermediate TBS; imTBS) stimulation delivered to the primary motor cortex (M1) contralateral to painful side...
September 22, 2017: Physiological Research
https://www.readbyqxmd.com/read/28935857/sensorimotor-computation-underlying-phototaxis-in-zebrafish
#2
Sébastien Wolf, Alexis M Dubreuil, Tommaso Bertoni, Urs Lucas Böhm, Volker Bormuth, Raphaël Candelier, Sophia Karpenko, David G C Hildebrand, Isaac H Bianco, Rémi Monasson, Georges Debrégeas
Animals continuously gather sensory cues to move towards favourable environments. Efficient goal-directed navigation requires sensory perception and motor commands to be intertwined in a feedback loop, yet the neural substrate underlying this sensorimotor task in the vertebrate brain remains elusive. Here, we combine virtual-reality behavioural assays, volumetric calcium imaging, optogenetic stimulation and circuit modelling to reveal the neural mechanisms through which a zebrafish performs phototaxis, i.e...
September 21, 2017: Nature Communications
https://www.readbyqxmd.com/read/28935683/synaptic-activation-of-putative-sensory-neurons-by-hexamethonium-sensitive-nerve-pathways-in-mouse-colon
#3
Timothy James Hibberd, Lee Travis, Lukasz Wiklendt, Marcello C Costa, Simon J H Brookes, Hongzhen Hu, Damien John Keating, Nick J Spencer
The gastrointestinal tract contains its own independent population of sensory neurons within the gut wall. These sensory neurons have been referred to as intrinsic primary afferent neurons (IPANs) and can be identified by immunoreactivity to calcitonin gene related peptide (CGRP) in mice. A common feature of IPANs is a paucity of fast synaptic inputs observed during sharp microelectrode recordings. Whether this is observed using different recording techniques is of particular interest for understanding the physiology of these neurons and neural circuit modelling...
September 21, 2017: American Journal of Physiology. Gastrointestinal and Liver Physiology
https://www.readbyqxmd.com/read/28935423/a-comparison-between-the-neural-correlates-of-laser-and-electric-pain-stimulation-and-their-modulation-by-expectation
#4
E J Hird, A K P Jones, D Talmi, W El-Deredy
BACKGROUND: Pain is modulated by expectation. Event-related potential (ERP) studies of the influence of expectation on pain typically utilise laser heat stimulation to provide a controllable nociceptive-specific stimulus. Painful electric stimulation has a number of practical advantages, but is less nociceptive-specific. We compared the modulation of electric versus laser-evoked pain by expectation, and their corresponding pain-evoked and anticipatory ERPs. NEW METHOD: We developed understanding of recognised methods of laser and electric stimulation...
September 18, 2017: Journal of Neuroscience Methods
https://www.readbyqxmd.com/read/28932132/central-sensitization-based-classification-for-temporomandibular-disorders-a-pathogenetic-hypothesis
#5
REVIEW
Annalisa Monaco, Ruggero Cattaneo, Maria Chiara Marci, Davide Pietropaoli, Eleonora Ortu
Dysregulation of Autonomic Nervous System (ANS) and central pain pathways in temporomandibular disorders (TMD) is a growing evidence. Authors include some forms of TMD among central sensitization syndromes (CSS), a group of pathologies characterized by central morphofunctional alterations. Central Sensitization Inventory (CSI) is useful for clinical diagnosis. Clinical examination and CSI cannot identify the central site(s) affected in these diseases. Ultralow frequency transcutaneous electrical nerve stimulation (ULFTENS) is extensively used in TMD and in dental clinical practice, because of its effects on descending pain modulation pathways...
2017: Pain Research & Management: the Journal of the Canadian Pain Society
https://www.readbyqxmd.com/read/28932001/the-effects-of-vibratory-stimulation-employed-to-forearm-and-arm-flexor-muscles-on-upper-limb-function-in-patients-with-chronic-stroke
#6
Sang-Mi Jung
[Purpose] The purpose of this study was to investigate not only the effects of stimulatory vibration but also the retained effects 2 weeks after the last session of the intervention. [Subjects and Methods] Ten subjects with post-stroke hemiplegia were recruited in this study. The experimental group (EG) received vibratory stimulation for 30 minutes in each session, three times a week for 2 weeks. Grip strength (GS), box-and-block test (BBT), and Weinstein monofilament were used to assess hand strength, dexterity, and sensory in the affected hand, respectively...
September 2017: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/28931610/the-coupling-of-synaptic-inputs-to-local-cortical-activity-differs-among-neurons-and-adapts-following-stimulus-onset
#7
Nathaniel Caleb Wright, Mahmood Sayed Hoseini, Tansel Baran Yasar, Ralf Wessel
Cortical activity contributes significantly to the high variability of sensory responses of interconnected pyramidal neurons, which has crucial implications for sensory coding. Yet, largely because of technical limitations of in vivo intracellular recordings, the coupling of a pyramidal neuron's synaptic inputs to the local cortical activity has evaded full understanding. Here, we obtained excitatory synaptic conductance (g) measurements from putative pyramidal neurons and local field potential (LFP) recordings from adjacent cortical circuits during visual processing in the turtle whole-brain ex vivo preparation...
September 20, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/28931569/individual-alpha-peak-frequency-predicts-10-hz-flicker-effects-on-selective-attention
#8
Rasa Gulbinaite, Tara van Viegen, Martijn Wieling, Michael X Cohen, Rufin VanRullen
Rhythmic visual stimulation ("flicker") is primarily used to "tag" processing of low-level visual and high-level cognitive phenomena. However, preliminary evidence suggests that flicker may also entrain endogenous brain oscillations, thereby modulating cognitive processes supported by those brain rhythms. Here we tested the interaction between 10 Hz flicker and endogenous alpha-band (∼10 Hz) oscillations during a selective visuospatial attention task. We recorded EEG from human participants (both genders) while they performed a modified Eriksen flanker task in which distractors and targets flickered within (10 Hz) or outside (7...
September 20, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28930544/neural-signatures-of-attention-insights-from-decoding-population-activity-patterns
#9
Panagiotis Sapountzis, Georgia G Gregoriou
Understanding brain function and the computations that individual neurons and neuronal ensembles carry out during cognitive functions is one of the biggest challenges in neuroscientific research. To this end, invasive electrophysiological studies have provided important insights by recording the activity of single neurons in behaving animals. To average out noise, responses are typically averaged across repetitions and across neurons that are usually recorded on different days. However, the brain makes decisions on short time scales based on limited exposure to sensory stimulation by interpreting responses of populations of neurons on a moment to moment basis...
January 1, 2018: Frontiers in Bioscience (Landmark Edition)
https://www.readbyqxmd.com/read/28929474/-new-thalamic-potential-associated-with-somatosensory-evoked-potentials
#10
L Vega-Zelaya, C V Torres, M Navas-Garcia, R G Sola, J Pastor
INTRODUCTION: The response of the thalamus during the study with somatosensory evoked potentials (SSEP) is not sufficiently understood. CASE REPORT: A 17-year-old man undergoing surgery for deep brain stimulation in the centromedian nucleus for drug-resistant epilepsy under complete sedation. During the intervention, the responses to SSEPs of the thalamic nuclei were recorded by means of four microelectrodes. These responses can be decomposed into three types: local field potentials (LFP), low amplitude fast oscillations (LFO), and high amplitude slow oscillations (HSO)...
October 1, 2017: Revista de Neurologia
https://www.readbyqxmd.com/read/28929244/analyzing-polymeric-matrix-for-fabrication-of-a-biodegradable-microneedle-array-to-enhance-transdermal-delivery
#11
Kuo-Yuan Hwa, Vincent H S Chang, Yao-Yi Cheng, Yue-Da Wang, Pey-Shynan Jan, Boopathi Subramani, Min-Ju Wu, Bo-Kai Wang
Traditional drug delivery systems, using invasive, transdermal, and oral routes, are limited by various factors, such as the digestive system environment, skin protection, and sensory nerve stimulation. To improve the drug delivery system, we fabricated a polysaccharide-based, dissolvable microneedle-based array, which combines the advantages of both invasive and transdermal delivery systems, and promises to be an innovative solution for minimally invasive drug delivery. In this study, we designed a reusable aluminum mold that greatly improved the efficiency and convenience of microneedle fabrication...
September 19, 2017: Biomedical Microdevices
https://www.readbyqxmd.com/read/28923157/walter-freeman-iii-and-the-chaotic-nature-of-dreams
#12
Allan Combs, Stanley Krippner
The contributions and life of Walter Freeman III are celebrated through an understanding of the neurodynamics of the dreaming brain. Beginning with a brief review of the universal dynamics of self-organizing systems, this paper turns to an exploration of dreaming through the application of concepts from chaos theory to brain activity during REM-state dreaming. Recent studies of the electrophysiology of the brain during REM state dreaming are reviewed, such as the active inhibition of sensory stimulation and, especially in REM sleep, alterations in the brain's dominant neuromodulatory systems, bombardment of the visual cortex with bursts of PGO activity, increased limbic system activity, and a reduction of activity in the brain's prefrontal regions...
October 2017: Nonlinear Dynamics, Psychology, and Life Sciences
https://www.readbyqxmd.com/read/28921770/does-an-observer-s-empathy-influence-my-pain-effect-of-perceived-empathetic-or-unempathetic-support-in-a-pain-test
#13
C Fauchon, I Faillenot, A M Perrin, C Borg, V Pichot, F Chouchou, L Garcia-Larrea, R Peyron
The physiological and behavioural effects of empathy for other's pain have been widely investigated, while the opposite situation, i.e. the influence on one's pain of empathetic feedback from others, remains largely unexplored. Here, we assessed whether and how empathetic and unempathetic comments from observers modulate pain and associated vegetative reactions. In Study 1, conversations between observers of a pain study were recorded by professional actors. Comments were prepared to be perceived as empathetic, unempathetic, or neutral, and were validated in 40 subjects...
September 16, 2017: European Journal of Neuroscience
https://www.readbyqxmd.com/read/28921570/behavioural-responses-of-infective-stage-copepodids-of-the-salmon-louse-lepeophtheirus-salmonis-copepoda-caligidae-to-host-related-sensory-cues
#14
D M Fields, A B Skiftesvik, H I Browman
The salmon louse (Lepeophtheirus salmonis [Krøyer]) is an ectoparasitic copepod that causes disease in farmed Atlantic salmon (Salmo salar) and may play a role in the decline of some wild salmonid populations. Controlling lice infestations is a major cost for the salmon industry; this has stimulated the pursuit of alternative approaches to controlling them. One such approach involves determining, and then disrupting, the sensory cues used by the parasite to find its host. In this context, we examined the behavioural responses of lice copepodids to light flicker-simulating light reflecting from the sides of the salmon host and/or the shadows cast by fish passing overhead-and water-soluble chemicals released from the skin of the salmon...
September 17, 2017: Journal of Fish Diseases
https://www.readbyqxmd.com/read/28919878/postural-control-in-bilateral-vestibular-failure-its-relation-to-visual-proprioceptive-vestibular-and-cognitive-input
#15
Andreas Sprenger, Jann F Wojak, Nico M Jandl, Christoph Helmchen
Patients with bilateral vestibular failure (BVF) suffer from postural and gait unsteadiness with an increased risk of falls. The aim of this study was to elucidate the differential role of otolith, semicircular canal (SSC), visual, proprioceptive, and cognitive influences on the postural stability of BVF patients. Center-of-pressure displacements were recorded by posturography under six conditions: target visibility; tonic head positions in the pitch plane; horizontal head shaking; sensory deprivation; dual task; and tandem stance...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28919538/roles-of-n-methyl-d-aspartate-receptors-during-the-sensory-stimulation-evoked-field-potential-responses-in-mouse-cerebellar-cortical-molecular-layer
#16
Yin-Hua Xu, Guang-Jian Zhang, Jing-Tong Zhao, Chun-Ping Chu, Yu-Zi Li, De-Lai Qiu
The functions of N-methyl-d-aspartate receptors (NMDARs) in cerebellar cortex have been widely studied under in vitro condition, but their roles during the sensory stimulation-evoked responses in the cerebellar cortical molecular layer in living animals are currently unclear. We here investigated the roles of NMDARs during the air-puff stimulation on ipsilateral whisker pad-evoked field potential responses in cerebellar cortical molecular layer in urethane-anesthetized mice by electrophysiological recording and pharmacological methods...
September 14, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28919433/the-p2x7-receptor-in-dorsal-root-ganglia-is-involved-in-hiv-gp120-associated-neuropathic-pain
#17
Bing Wu, Lichao Peng, Jinyan Xie, Lifang Zou, Qicheng Zhu, Huaide Jiang, Zhihua Yi, Shouyu Wang, Yun Xue, Yun Gao, Guilin Li, Shuangmei Liu, Chunping Zhang, Guodong Li, Shangdong Liang, Huangui Xiong
Human immunodeficiency virus (HIV)-associated neuropathic pain is common, and studies have shown that HIV envelope glycoprotein 120 (gp120) can directly stimulate primary sensory afferent neurons causing hyperalgesia. The P2X7 receptor in the dorsal root ganglia (DRG) is involved in pain transmission and is closely related to the inflammatory and immune response. In this study, we aimed to explore the role of the P2X7 receptor in gp120-induced neuropathic pain using a rat model specific for this type of pain...
September 14, 2017: Brain Research Bulletin
https://www.readbyqxmd.com/read/28919363/thoracic-spinal-cord-and-cervical-vagosympathetic-neuromodulation-obtund-nodose-sensory-transduction-of-myocardial-ischemia
#18
Siamak Salavatian, Eric Beaumont, David Gibbons, Matthew Hammer, Donald B Hoover, J Andrew Armour, Jeffrey L Ardell
BACKGROUND: Autonomic regulation therapy involving either vagus nerve stimulation (VNS) or spinal cord stimulation (SCS) represents emerging bioelectronic therapies for heart disease. The objective of this study was to determine if VNS and/or SCS modulate primary cardiac afferent sensory transduction of the ischemic myocardium. METHODS: Using extracellular recordings in 19 anesthetized canines, of 88 neurons evaluated, 36 ventricular-related nodose ganglia sensory neurons were identified by their functional activity responses to epicardial touch, chemical activation of their sensory neurites (epicardial veratridine) and great vessel (descending aorta or inferior vena cava) occlusion...
August 18, 2017: Autonomic Neuroscience: Basic & Clinical
https://www.readbyqxmd.com/read/28917592/prefrontal-versus-motor-cortex-transcranial-direct-current-stimulation-tdcs-effects-on-post-surgical-opioid-use
#19
Jeffrey J Borckardt, Scott T Reeves, Cole Milliken, Brittan Carter, Thomas I Epperson, Ryan J Gunselman, Alok Madan, H Del Schutte, Harry A Demos, Mark S George
BACKGROUND: Pain is often a complaint that precedes total knee arthroplasty (TKA), however the procedure itself is associated with considerable post-operative pain lasting days to weeks which can predict longer-term surgical outcomes. Previously, we reported significant opioid-sparing effects of motor cortex transcranial direct current stimulation from a single-blind trial. In the present study, we used double-blind methodology to compare motor cortex tDCS and prefrontal cortex tDCS to both sham and active-control (active electrodes over non-pain modulating brain areas) tDCS...
September 6, 2017: Brain Stimulation
https://www.readbyqxmd.com/read/28913778/neural-basis-of-early-somatosensory-change-detection-a-magnetoencephalography-study
#20
G Naeije, T Vaulet, V Wens, B Marty, S Goldman, X De Tiège
The mismatch negativity (MMN) reflects the early detection of changes in sensory stimuli at the cortical level. The mechanisms underlying its genesis remain debated. This magnetoencephalography study investigates the spatio-temporal dynamics and the neural mechanisms of the magnetic somatosensory MMN. Somatosensory evoked magnetic fields elicited by tactile stimulation of the right fingertip (Single), tactile stimulation of the right middle phalanx and fingertip (Double) or omissions (Omitted) of tactile stimuli were studied in different paradigms: in oddballs where Double/Omitted followed a sequence of four Single, in sequences of two stimuli where Double occurred after one Single, and in random presentation of Double only...
September 14, 2017: Brain Topography
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