keyword
MENU ▼
Read by QxMD icon Read
search

Electromyogram

keyword
https://www.readbyqxmd.com/read/28934522/effects-of-cannabinoid-agonists-and-antagonists-on-sleep-and-breathing-in-sprague-dawley-rats
#1
Michael W Calik, David W Carley
Study Objectives: There are no pharmacological treatments for obstructive sleep apnea syndrome, but dronabinol showed promise in a small pilot study. In anesthetized rats, dronabinol attenuates reflex apnea via activation of cannabinoid (CB) receptors located on vagal afferents; an effect blocked by cannabinoid type 1 (CB1) and/or type 2 (CB2) receptor antagonists. Here, using a natural model of central sleep apnea, we examine the effects of dronabinol, alone and in combination with selective antagonists in conscious rats chronically instrumented to stage sleep and measure cessation of breathing...
September 1, 2017: Sleep
https://www.readbyqxmd.com/read/28932190/empirical-evaluation-of-voluntarily-activatable-muscle-synergies
#2
Shunta Togo, Hiroshi Imamizu
The muscle synergy hypothesis assumes that individual muscle synergies are independent of each other and voluntarily controllable. However, this assumption has not been empirically tested. This study tested if human subjects can voluntarily activate individual muscle synergies extracted by non-negative matrix factorization (NMF), the standard mathematical method for synergy extraction. We defined the activation of a single muscle synergy as the generation of a muscle activity pattern vector parallel to the single muscle synergy vector...
2017: Frontiers in Computational Neuroscience
https://www.readbyqxmd.com/read/28921744/cholinergic-basal-forebrain-structures-are-not-essential-for-mediation-of-the-arousing-action-of-glutamate
#3
Zoltán Lelkes, Shamsiiat Abdurakhmanova, Tarja Porkka-Heiskanen
The cholinergic basal forebrain contributes to cortical activation and receives rich innervations from the ascending activating system. It is involved in the mediation of the arousing actions of noradrenaline and histamine. Glutamatergic stimulation in the basal forebrain results in cortical acetylcholine release and suppression of sleep. However, it is not known to what extent the cholinergic versus non-cholinergic basal forebrain projection neurones contribute to the arousing action of glutamate. To clarify this question, we administered N-methyl-D-aspartate (NMDA), a glutamate agonist, into the basal forebrain in intact rats and after destruction of the cholinergic cells in the basal forebrain with 192 immunoglobulin (Ig)G-saporin...
September 18, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28912700/action-direction-of-muscle-synergies-in-voluntary-multi-directional-postural-control
#4
Akari Kubo, Shota Hagio, Benio Kibushi, Toshio Moritani, Motoki Kouzaki
A muscle synergy is a coordinative structure of muscles that has been proposed as a strategy to reduce the number of variables that the central nervous system (CNS) has to address in motor tasks. In this article, the mechanical contribution of muscle synergies and coordinative structures of muscles in voluntary multi-directional postural control were investigated. The task for healthy, young subjects was to shift and align their center of pressure (COP) to targets dispersed in 12 different directions in the horizontal plane by leaning their bodies for 10 s...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28906346/time-course-of-changes-in-corticospinal-excitability-after-short-term-forearm-hand-immobilization
#5
Tetsuya Karita, Akihiro Matsuura, Yoshihiro Kondo, Kohta Tomimura, Nao Nakada, Futoshi Mori
The short-term joint immobilization induces a decrease of corticospinal excitability; however, detailed time course of the immobilization-induced central nervous system changes and their extent have not yet been clarified. To evaluate the time course of changes in corticospinal excitability during forearm/hand immobilization for 24 h and investigate the effect on muscle strength, adhesive casting tape was used to immobilize the nondominant forearm/hand. The amplitude of the motor-evoked potential of the flexor pollicis brevis muscle induced by transcranial magnetic stimulation was measured during immobilization and after cast removal...
September 12, 2017: Neuroreport
https://www.readbyqxmd.com/read/28900414/alterations-in-spectral-attributes-of-surface-electromyograms-after-utilization-of-a-foot-drop-stimulator-during-post-stroke-gait
#6
Rakesh Pilkar, Arvind Ramanujam, Karen J Nolan
BACKGROUND: A foot drop stimulator (FDS) is a rehabilitation intervention that stimulates the common peroneal nerve to facilitate ankle dorsiflexion at the appropriate time during post-stroke hemiplegic gait. Time-frequency analysis (TFA) of non-stationary surface electromyograms (EMG) and spectral variables such as instantaneous mean frequency (IMNF) can provide valuable information on the long-term effects of FDS intervention in terms of changes in the motor unit (MU) recruitment during gait, secondary to improved dorsiflexion...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28888906/the-comparison-of-ground-reaction-forces-and-lower-limb-muscles-correlation-and-activation-time-delay-between-forward-and-backward-walking
#7
Mohammadreza Mahaki, Gustavo Souto De Sá E Souza, Raghad Mimar, Marcus Fraga Vieira
This study aimed to compare the ground reaction forces (GRF) and lower limb muscles correlation and activation time delay between Forward (FW) and Backward (BW) walking. Twenty-four male students participated in this research. Electromyogram activities of gluteus medius, biceps femoris, medial gastrocnemius, soleus and anterior tibialis muscles along with GRFs were measured. Each participant performed two FW and two BW trials bare foot. Statistical parametric mapping (SPM) analysis was performed over anterior-posterior and vertical GRFs time series...
September 6, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28883745/review-of-devices-used-in-neuromuscular-electrical-stimulation-for-stroke-rehabilitation
#8
REVIEW
Kotaro Takeda, Genichi Tanino, Hiroyuki Miyasaka
Neuromuscular electrical stimulation (NMES), specifically functional electrical stimulation (FES) that compensates for voluntary motion, and therapeutic electrical stimulation (TES) aimed at muscle strengthening and recovery from paralysis are widely used in stroke rehabilitation. The electrical stimulation of muscle contraction should be synchronized with intended motion to restore paralysis. Therefore, NMES devices, which monitor electromyogram (EMG) or electroencephalogram (EEG) changes with motor intention and use them as a trigger, have been developed...
2017: Medical Devices: Evidence and Research
https://www.readbyqxmd.com/read/28855444/a-rat-model-for-studying-electroacupuncture-analgesia-on-acute-visceral-hyperalgesia
#9
De-Bo Qi, Si-Hui Zhang, Yu-Hua Zhang, Shu-Qin Wu, Wei-Min Li
The aim of this study was to establish an appropriate rat model to study the effect of electroacupuncture (EA) analgesia on acute visceral hyperalgesia. Adult rats received colorectal instillation with different concentrations of acetic acid (AA). Treatment with EA was performed for 30 min at bilateral acupoints of ST-36 and ST-37 in the hind limbs. The visceral sensation of all rats was quantified by scores of abdominal withdrawal reflex (AWR) and discharges of rectus abdominis electromyogram (EMG) in response to colorectal distension (CRD)...
August 30, 2017: Experimental Animals
https://www.readbyqxmd.com/read/28844175/diaphragm-and-intercostal-muscle-activity-following-mid-cervical-spinal-cord-contusion-in-the-rat
#10
Ming-Han Wen, Kun-Ze Lee
The present study was designed to investigate the diaphragm and intercostal muscle activity following unilateral mid-cervical spinal cord contusion in rats. Electromyogram (EMG) activity of the bilateral diaphragm and T2 intercostal muscle was measured in anesthetized and spontaneously breathing rats. Unilateral mid-cervical contusion caused an immediate reduction in inspiratory bursting in the bilateral diaphragm and intercostal muscles. From 3 days to 8 weeks post-contusion, the contused animals displayed significantly lower tidal volume than uninjured animals, regardless of the time point after injury...
August 26, 2017: Journal of Neurotrauma
https://www.readbyqxmd.com/read/28832192/trends-in-the-surgical-treatment-for-cubital-tunnel-syndrome-a-survey-of-members-of-the-american-society-for-surgery-of-the-hand
#11
Ayesha Yahya, Andrew R Malarkey, Ryan L Eschbaugh, H Brent Bamberger
BACKGROUND: Cubital tunnel syndrome is the second most common compression neuropathy affecting the upper extremity. The aim of this study was to determine the preferred surgical treatment for cubital tunnel syndrome by members of the American Society for Surgery of the Hand (ASSH). METHODS: We invited members of the ASSH research mailing list to complete our online survey. They were presented with 6 hypothetical cases and asked to choose their preferred treatment from the following options: open in situ decompression, endoscopic decompression, submuscular transposition, subcutaneous transposition, medial epicondylectomy, and conservative management...
August 1, 2017: Hand: Official Journal of the American Association for Hand Surgery
https://www.readbyqxmd.com/read/28823081/neck-inspiratory-muscle-activation-patterns-during-well-controlled-inspiration
#12
Sohei Washino, Hiroaki Kanehisa, Yasuhide Yoshitake
PURPOSE: Surprisingly, the activation characteristics of the neck inspiratory muscles as a function of key inspiratory mechanical parameters have yet to be demonstrated experimentally under well-controlled conditions. This study aimed to elucidate the muscle activation patterns of the neck inspiratory muscles by strictly controlling flow rate and lung volume. METHODS: Thirteen healthy subjects matched their inspiratory flow rate at approximately 20-100% of peak flow rate (PFR) as steady as possible during inspiration...
August 19, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28819047/unusual-case-of-bilateral-hand-weakness
#13
Sayan Datta, Jeremy Cosgrove, Taimour Alam, Helen L Ford
A 35-year-old man presented with myalgia and bilateral hand weakness, 3 days after the onset of lethargy, fevers and rigours. The hand weakness caused functional impairment including difficulty pressing keys on his mobile phone. On examination, there was mild bilateral hand weakness with normal reflexes. His serum creatine kinase was mildly raised at 503 U/L (24-195), viral PCR throat swab was negative and electromyogram showed subtle myopathic changes in the distal forearm muscles. Nerve conduction studies found no evidence of neuropathy...
August 17, 2017: Practical Neurology
https://www.readbyqxmd.com/read/28818462/discovery-of-non-zwitterionic-aryl-sulfonamides-as-nav1-7-inhibitors-with-efficacy-in-preclinical-behavioral-models-and-translational-measures-of-nociceptive-neuron-activation
#14
Yong-Jin Wu, Jason Guernon, Andrea McClure, Guanglin Luo, Ramkumar Rajamani, Alicia Ng, Amy Easton, Amy Newton, Clotilde Bourin, Dawn Parker, Kathleen Mosure, Omar Barnaby, Matthew G Soars, Ronald J Knox, Michele Matchett, Rick Pieschl, James Herrington, Ping Chen, D V Sivarao, Linda J Bristow, Nicholas A Meanwell, Joanne Bronson, Richard Olson, Lorin A Thompson, Carolyn Dzierba
Since zwitterionic benzenesulfonamide Nav1.7 inhibitors suffer from poor membrane permeability, we sought to eliminate this characteristic by replacing the basic moiety with non-basic bicyclic acetals and monocyclic ethers. These efforts led to the discovery of the non-zwitterionic aryl sulfonamide 49 as a selective Nav1.7 inhibitor with improved membrane permeability. Despite its moderate cellular activity, 49 exhibited robust efficacy in mouse models of neuropathic and inflammatory pain and modulated translational electromyogram measures associated with activation of nociceptive neurons...
August 9, 2017: Bioorganic & Medicinal Chemistry
https://www.readbyqxmd.com/read/28815952/partial-sleep-deprivation-reduces-the-efficacy-of-orexin-a-to-stimulate-physical-activity-and-energy-expenditure
#15
Danielle P DePorter, Jamie E Coborn, Jennifer A Teske
OBJECTIVE: Sufficient sleep is required for weight maintenance. Sleep deprivation due to noise exposure stimulates weight gain by increasing hyperphagia and reducing energy expenditure (EE). Yet the mechanistic basis underlying the weight gain response is unclear. Orexin-A promotes arousal and negative energy balance, and orexin terminals project to the ventrolateral preoptic area (VLPO), which is involved in sleep-to-wake transitions. To determine whether sleep deprivation reduces orexin function in VLPO and to test the hypothesis that sleep deprivation would attenuate the orexin-A-stimulated increase in arousal, physical activity (PA), and EE...
August 17, 2017: Obesity
https://www.readbyqxmd.com/read/28814894/startle-modulation-by-heat-pain-with-varying-threat-levels-in-chronic-pain-patients-and-pain-free-controls
#16
C Horn-Hofmann, D Wolf, S Wolff, M Heesen, K Knippenberg-Bigge, P M Lang, S Lautenbacher
BACKGROUND: Empirical evidence suggests that affective responses to pain are changed in chronic pain. The investigation of startle responses to pain might contribute to clarifying whether such alterations also expand to motivational defensive reactions. We aimed at comparing startle responses to tonic heat pain with high threat (HT) or low threat (LT) in patients with chronic musculoskeletal pain and controls. As pain-related anxiety and catastrophizing are typically elevated in chronic pain, we expected to find stronger startle responses in patients specifically under experimental HT...
2017: Journal of Pain Research
https://www.readbyqxmd.com/read/28813928/difficulty-adaptation-in-a-competitive-arm-rehabilitation-game-using-real-time-control-of-arm-electromyogram-and-respiration
#17
A Darzi, M Gorsic, D Novak
Rehabilitation robots are often combined with serious games that motivate patients and keep them exercising at high intensities. A promising type of game are competitive rehabilitation games, but few difficulty adaptation algorithms have been presented for them. This paper thus presents the adaptation of difficulty in a competitive arm rehabilitation game based on two physiological signals: respiration and electromyography of the posterior deltoid. It consists of three smaller studies: an open-loop respiration study, a closed-loop respiration study (where a controller attempts to maintain respiration rate at preset levels), and a closed-loop electromyogram study (where a controller attempts to keep the electromyogram at preset levels)...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28813846/closed-loop-emg-informed-model-based-analysis-of-human-musculoskeletal-mechanics-on-rough-terrains
#18
C Varotto, Z Sawacha, L Gizzi, D Farina, M Sartori
This work aims at estimating the musculoskeletal forces acting in the human lower extremity during locomotion on rough terrains. We employ computational models of the human neuro-musculoskeletal system that are informed by multi-modal movement data including foot-ground reaction forces, 3D marker trajectories and lower extremity electromyograms (EMG). Data were recorded from one healthy subject locomoting on rough grounds realized using foam rubber blocks of different heights. Blocks arrangement was randomized across all locomotion trials to prevent adaptation to specific ground morphology...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28813837/walking-speed-intention-model-using-soleus-electromyogram-signal-of-nondisabled-and-post-stroke-hemiparetic-patients
#19
Sang Hun Chung, Taejin Choi, Yoha Hwang, Hyungmin Kim, Seung-Jong Kim, Min Ho Chun, Jong Min Lee
It is well known that the activation of plantar flexors have a strong influence on the walking speed. If the gait speed can be predicted using this relationship, a post-stroke hemiparetic patient could control a gait rehabilitation robot according to his or her gait intention, and the robotic gait rehabilitation effect could be further improved. To find out this relationship, 9 nondisabled subjects and 4 chronic post-stroke hemiparetic subjects performed overground level walking at a comfortable pace, a slow pace, a fast pace, and an increasing pace with electromyogram sensors attached on plantar flexors...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28813110/trait-vs-state-anxiety-in-different-threatening-situations
#20
Pollyana Caldeira Leal, Tiago Costa Goes, Luiz Carlos Ferreira da Silva, Flavia Teixeira-Silva
Objective: Anxiety as a uni- or multidimensional construct has been under discussion. The unidimensional approach assumes that there is a general trait anxiety, which predisposes the individuals to increases in state anxiety in various threatening situations. In this case, there should be a correlation between state and trait anxiety in any situation of threat. Therefore, the aim of this study was to investigate the correlation between trait and state anxiety in participants exposed to two different anxiogenic situations: interpersonal threat (Video-Monitored Stroop Test - VMST) and physical threat (third molar extraction - TME)...
August 14, 2017: Trends in Psychiatry and Psychotherapy
keyword
keyword
103994
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"