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Intermuscular stimulation

Catherine E Kerr, Uday Agrawal, Sandeep Nayak
Tai Chi (TC) is a slow-motion contemplative exercise that is associated with improvements in sensorimotor measures, including decreased force variability, enhanced tactile acuity, and improved proprioception, especially in elderly populations. Here, we carried out two studies evaluating the effect of TC practice on measures associated with sensorimotor processing. In study 1, we evaluated TC's effects on an oscillatory parameter associated with motor function, beta rhythm (15-30 Hz) coherence, focusing specifically on beta rhythm intermuscular coherence (IMC), which is tightly coupled to beta corticomuscular coherence (CMC)...
2016: Frontiers in Human Neuroscience
Beibei Zhao, Takayuki Katagiri, Hidehiro Kondo, Ikuo Hirono
A new type of CXCL8, named CXCL8_L1b, was identified in this research. Comparison of amino acid sequences of Japanese flounder CXCL8_L1b and CXCL8_L1a (BAB86884.1) showed only 41.2% identity. Transcripts of CXCL8_L1a were highly detected in spleen, kidney, gill and liver, while transcripts of CXCL8_L1b only were detected highly in spleen and kidney of apparently healthy fish. In fish challenged with E. tarda, transcripts of CXCL8_L1a were significantly increased at day 6, while no significant increase was detected in the mRNA level of CXCL8_L1b...
September 2015: Developmental and Comparative Immunology
Marlieke Scholten, Rosa Klotz, Christian Plewnia, Tobias Wächter, Carina Mielke, Bastiaan R Bloem, Christoph Braun, Ulf Ziemann, Rathinaswamy B Govindan, Alireza Gharabaghi, Rejko Krüger, Daniel Weiss
OBJECTIVE: The pathophysiology of deep brain stimulation mechanisms and resistant freezing phenomena in idiopathic Parkinson's disease (iPD) remains incompletely understood. Further studies on the neuromuscular substrates are needed. METHODS: We analyzed 16 patients with advanced iPD and bilateral subthalamic nucleus stimulation, and 13 age- and gender-matched healthy controls. Patients were tested after overnight withdrawal of medication with 'stimulation off' (StimOff) and 'stimulation on' (StimOn)...
January 2016: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
Ashraf S Gorgey, Refka E Khalil
OBJECTIVE: To determine the effects of 12 weeks of neuromuscular electrical stimulation (NMES) training with ankle weights on intermuscular fascial length and patellar tendon cross-sectional area (CSA) in persons with spinal cord injury (SCI). METHODS: This study was a pre-post intervention. Seven men with motor complete SCI were randomly assigned to a resistance training plus diet (RT + diet) group (n = 4) or a diet control group (n = 3). Participants in the RT + diet group were enrolled in a 12-week leg extension weight-lifting program via surface NMES of the knee extensor muscle group...
2015: Topics in Spinal Cord Injury Rehabilitation
James R Fox, Weili Gray, Cathryn Koptiuch, Gary J Badger, Helene M Langevin
OBJECTIVES: Acupuncture needle manipulation causes mechanical deformation of connective tissue, which in turn results in mechanical stimulation of fibroblasts, with active changes in cell shape and autocrine purinergic signaling. We have previously shown using ultrasound elastography in humans that acupuncture needle manipulation causes measurable movement of tissue up to several centimeters away from the needle. The goal of this study was to quantify the spatial pattern of tissue displacement and deformation (shear strain) in response to acupuncture needling along an intermuscular connective tissue plane compared with needling over the belly of a muscle...
April 2014: Journal of Alternative and Complementary Medicine: Research on Paradigm, Practice, and Policy
Corey R Tomczak, Krista R Greidanus, Carol A Boliek
Chest wall muscle recruitment varies as a function of the breathing task performed. However, the cortical control of the chest wall muscles during different breathing tasks is not known. We studied chest wall intermuscular coherence during various task-related lung volume excursions in 10 healthy adults (34 ± 15 yr; 2 men, 8 women) and determined if transcranial direct current stimulation (tDCS) could modulate chest wall intermuscular coherence during these tasks. Simultaneous assessment of regional intercostal and oblique electromyographic activity was measured while participants performed standardized tidal breathing, speech, maximum phonation, and vital capacity tasks...
August 2013: Journal of Neurophysiology
Kianoush Nazarpour, Amy Barnard, Andrew Jackson
Correlation structure in the activity of muscles across movements is often interpreted as evidence for low-level, hardwired constraints on upper-limb function. However, muscle synergies may also emerge from optimal strategies to achieve high-level task goals within a redundant control space. To distinguish these contrasting interpretations, we examined the structure of muscle variability during operation of a myoelectric interface in which task constraints were dissociated from natural limb biomechanics. We found that, with practice, human subjects learned to shape patterns of covariation between arbitrary pairs of hand and forearm muscles appropriately for elliptical targets whose orientation varied on a trial-by-trial basis...
September 5, 2012: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
Karen M Fisher, Boubker Zaaimi, Timothy L Williams, Stuart N Baker, Mark R Baker
In motor neuron disease, the focus of therapy is to prevent or slow neuronal degeneration with neuroprotective pharmacological agents; early diagnosis and treatment are thus essential. Incorporation of needle electromyographic evidence of lower motor neuron degeneration into diagnostic criteria has undoubtedly advanced diagnosis, but even earlier diagnosis might be possible by including tests of subclinical upper motor neuron disease. We hypothesized that beta-band (15-30 Hz) intermuscular coherence could be used as an electrophysiological marker of upper motor neuron integrity in such patients...
September 2012: Brain: a Journal of Neurology
Jinsook Roh, William Z Rymer, Randall F Beer
Previous studies using advanced matrix factorization techniques have shown that the coordination of human voluntary limb movements may be accomplished using combinations of a small number of intermuscular coordination patterns, or muscle synergies. However, the potential use of muscle synergies for isometric force generation has been evaluated mostly using correlational methods. The results of such studies suggest that fixed relationships between the activations of pairs of muscles are relatively rare. There is also emerging evidence that the nervous system uses independent strategies to control movement and force generation, which suggests that one cannot conclude a priori that isometric force generation is accomplished by combining muscle synergies, as shown in movement control...
April 2012: Journal of Neurophysiology
Jens Bojsen-Møller, Sidse Schwartz, Kari K Kalliokoski, Taija Finni, S Peter Magnusson
The exact mechanical function of synergist muscles within a human limb in vivo is not well described. Recent studies indicate the existence of a mechanical interaction between muscle actuators that may have functional significance and further play a role for injury mechanisms. The purpose of the present study was to investigate if intermuscular force transmission occurs within and between human plantarflexor muscles in vivo. Seven subjects performed four types of either active contractile tasks or passive joint manipulations: passive knee extension, voluntary isometric plantarflexion, voluntary isometric hallux flexion, passive hallux extension, and selective percutaneous stimulation of the gastrocnemius medialis (MG)...
December 2010: Journal of Applied Physiology
J N van der Meer, A C Schouten, L J Bour, E de Vlugt, A F van Rootselaar, F C T van der Helm, M A J Tijssen
In dystonia, both sensory malfunctioning and an abnormal intermuscular low-frequency drive of 3-7 Hz have been found, although cause and effect are unknown. It is hypothesized that sensory processing is primarily disturbed and induces this drive. Accordingly, experimenter-controlled sensory input should be able to influence the frequency of the drive. In six genetically confirmed myoclonus-dystonia (MD) patients and six matched controls, the low-frequency drive was studied with intermuscular coherence analysis...
May 2010: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
Alina Mihaela Neacsu
Hypotensive effect to prostaglandins analogs (latanoprost, travoprost, tafluprost) means to increase uveoscleral outflow by action to FP receptors who generated extracellular matrix changes and intermuscular spaces changes. Syntetic prostamides analogs (bimatoprost) have a particulary action with a receptors most and intensive studied. The bimatoprost effect is the consequences to preferated stimulations on the specific receptors who have action only the tissue with prostaglandins activity is important to specify what the bimatoprost have dual effect: to uveoscleral outflow and classic outflow by increase hidraulic conductivity...
2009: Oftalmologia
Masashi Nakajima, Nobuko Ono, Tomoko Kojima, Koichi Kusunose
We report a patient with primary ulnar entrapment neuropathy in the midarm. Stimulation of multiple sites along the ulnar nerve showed a motor conduction block at a distance of 7.5-10 cm proximal to the medial epicondyle, where the nerve was compressed by the medial intermuscular septum. Anatomically, the possibility of ulnar nerve entrapment in this segment has long been suggested, and stimulation at least 10 cm above the medial epicondyle may reveal the entrapment. Muscle Nerve 39: 707-710, 2009.
May 2009: Muscle & Nerve
Kyla T Ross, T Richard Nichols
Electrophysiological studies in anesthetized animals have revealed that pathways carrying force information from Golgi tendon organs in antigravity muscles mediate widespread inhibition among other antigravity muscles in the feline hindlimb. More recent evidence in paralyzed or nonparalyzed decerebrate cats has shown that some inhibitory pathways are suppressed and separate excitatory pathways from Golgi tendon organ afferents are opened on the transition from steady force production to locomotor activity. To obtain additional insight into the functions of these pathways during locomotion, we investigated the distribution of force-dependent inhibition and excitation during spontaneous locomotion and during constant force exertion in the premammillary decerebrate cat...
January 2009: Journal of Neurophysiology
Michael J Barrington, Su-Ling K Lai, Chris A Briggs, Jason J Ivanusic, Samuel R Gledhill
BACKGROUND AND OBJECTIVES: Ultrasound-guided sciatic nerve block is a relatively new regional anesthesia technique with few descriptions in the literature. The objective of this study was to assess the ease with which the sciatic nerve could be imaged in the midthigh region using ultrasound and to describe the anatomy surrounding the sciatic nerve at this location. METHODS: In this prospective observational study, 40 patients scheduled for surgery where sciatic nerve block was indicated were scanned between the gluteal and the popliteal regions using an ultrasound machine (Vivid-i, GE Healthcare, Chalfont St...
July 2008: Regional Anesthesia and Pain Medicine
K M Chan
Erratum HA Power, JA Norton, CL Porter, Z Doyle, I Hui & KM Chan University of Alberta, Edmonton, Canada The paper by Power et al. contained an error in Figure 1. Figure 1 should have appeared as shown in the full pdf. References Power HA, Norton JA, Porter CL, Doyle Z, Hui I & Chan KM (2007). Transcranial direct current stimulation of the primary motor cortex affects cortical drive to human musculature as assessed by intermuscular coherence. 577, 795-803.
August 2, 2007: Journal of Physiology
Peter A Huijing, Rolf W van de Langenberg, Jorit J Meesters, Guus C Baan
The purpose of the present study was to test the hypothesis that myofascial force transmission may not be limited by compartmental boundaries of a muscle group to synergists. Muscles of the anterior tibial compartment in rat hindlimb as well as of the neighbouring peroneal compartment (antagonistic muscles) were excited maximally. Length-force data, based on proximal lengthening, of EDL, as well as distal lengthening of the tibial muscles (TA+EHL) and the peroneal muscle group (PER) were collected independently, while keeping the other two muscle groups at a constant muscle-tendon complex length...
December 2007: Journal of Electromyography and Kinesiology
Katrine Almind, Monia Manieri, William I Sivitz, Saverio Cinti, C Ronald Kahn
C57BL/6 (B6) mice subjected to a high-fat diet develop metabolic syndrome with obesity, hyperglycemia, and insulin resistance, whereas 129S6/SvEvTac (129) mice are relatively protected from this disorder because of differences in higher basal energy expenditure in 129 mice, leading to lower weight gain. At a molecular level, this difference correlates with a marked higher expression of uncoupling protein 1 (UCP1) and a higher degree of uncoupling in vitro in mitochondria isolated from muscle of 129 versus B6 mice...
February 13, 2007: Proceedings of the National Academy of Sciences of the United States of America
Hollie A Power, Jonathan A Norton, Cheryl L Porter, Zoe Doyle, Isaiah Hui, K Ming Chan
Intermuscular coherence analysis can be used to assess the common drive to muscles. Coherence in the beta-frequency band (15-35 Hz) is thought to arise from common cortical sources. Intermuscular coherence analysis is a potentially attractive tool for the investigation of motor cortical excitability changes because it is non-invasive and can be done relatively quickly. We carried out this study to test the hypothesis that intermuscular coherence analysis was able to detect cortical excitability changes in healthy subjects following transcranial direct current stimulation (tDCS)...
December 15, 2006: Journal of Physiology
Huub Maas, Hanneke J M Meijer, Peter A Huijing
The purpose of the present study is to investigate the origin of mechanical interactions between the rat extensor digitorum longus (EDL) muscle and the grouped tibialis anterior and extensor hallucis longus muscles (TA+EHL). The proximal and distal tendons of EDL as well as the tied distal tendons of TA+EHL were transected and connected to force transducers. Connective tissues at the muscle bellies of the anterior crural compartment were left intact. Supramaximal stimulation of the common peroneal nerve activated all muscles maximally and simultaneously...
2005: Cells, Tissues, Organs
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