Search results for "EMG"
showing 10 items of 109 documents
Use of arms - influence to human balance during perturbation
2014
Tämän Pro gradu –tutkielman tarkoituksena oli selvittää, miten käsien käyttäminen tai käyttämättömyys vaikuttaa ihmisen tasapainon korjaamiseen äkillisessä horjutus (häiriö) tilanteessa. Tutkimukseen osallistui viisi vapaaehtoista koehenkilöä (32 +/- 11 vuotta). Tutkimuksen testiprotokollassa tasapainon korjaamiseksi häiriötilanteessa, henkilö asetettiin seisoman juoksumaton päälle, joka liikahti 0.2 metriä eteenpäin, anterior-suunnassa (nopeus 0.24 m/s). Tutkimuksessa käytettiin kahta eri tilaa: kädet ja ei kädet –tila, missä koehenkilö sulki kätensä vartalon eteen puuhkaan. Tasapainoa mitattiin juoksumaton voimalevyltä ja koehenkilön painopisteen muutokset…
Design and validation of a wireless Body Sensor Network for integrated EEG and HD-sEMG acquisitions
2022
Sensorimotor integration is the process through which the human brain plans the motor program execution according to external sources. Within this context, corticomuscular and corticokinematic coherence analyses are common methods to investigate the mechanism underlying the central control of muscle activation. This requires the synchronous acquisition of several physiological signals, including EEG and sEMG. Nevertheless, physical constraints of the current, mostly wired, technologies limit their application in dynamic and naturalistic contexts. In fact, although many efforts were made in the development of biomedical instrumentation for EEG and High Density-surface EMG (HD-sEMG) signal ac…
The Brain Electrophysiological recording & STimulation (BEST) toolbox
2021
Abstract Non-invasive brain stimulation (NIBS) experiments involve many recurring procedures that are not sufficiently standardized in the community. Given the diversity in experimental design and experience of the investigators, automated but yet flexible data collection and analysis tools are needed to increase objectivity, reliability, and reproducibility of NIBS experiments. The B rain E lectrophysiological recording and ST imulation (BEST) Toolbox is a MATLAB-based, open-source software with graphical user interface that allows users to design, run, and share freely configurable multi-protocol, multi-session NIBS studies, including transcranial magnetic, electric, and ultrasound stimul…
Feature Extraction and Selection for Pain Recognition Using Peripheral Physiological Signals.
2019
In pattern recognition, the selection of appropriate features is paramount to both the performance and the robustness of the system. Over-reliance on machine learning-based feature selection methods can, therefore, be problematic; especially when conducted using small snapshots of data. The results of these methods, if adopted without proper interpretation, can lead to sub-optimal system design or worse, the abandonment of otherwise viable and important features. In this work, a deep exploration of pain-based emotion classification was conducted to better understand differences in the results of the related literature. In total, 155 different time domain and frequency domain features were e…
''Investigating reduction of dimensionality during single-joint elbow movements: a case study on muscle synergies''
2013
Chiovetto, Enrico | Berret, Bastien | Delis, Ioannis | Panzeri, Stefano | Pozzo, Thierry; International audience; ''A long standing hypothesis in the neuroscience community is that the central nervous system (CNS) generates the muscle activities to accomplish movements by combining a relatively small number of stereotyped patterns of muscle activations, often referred to as" muscle synergies." Different definitions of synergies have been given in the literature. The most well-known are those of synchronous, time-varying and temporal muscle synergies. Each one of them is based on a different mathematical model used to factor some EMG array recordings collected during the execution of variety…
Kurzemes un Zemgales hercogiste no 1561. - 1795.gadam latviešu historiogrāfijas vērtējumā
2018
Bakalaura darbs ir uzrakstīts ar mērķi analizēt Kurzemes un Zemgales hercogistes vēstures atspoguļojumu latviešu historiogrāfijā un apzināt vērtējumu galvenās tendences. Darbs veidots, ievērojot hronoloģiskos atskaites punktus, sākot ar hercogistes izveidošanos 1561.gadā un beidzot ar hercogistes inkorporāciju Krievijas impērijā 1795.gadā, atsevišķas nodaļas veltot galvenajai problēmai visā hercogistes pastāvēšanas laikā, proti hercogu cīņai ar muižniecību par varu un hercogu cīņai par dinastijas saglabāšanu un hercogistes pastāvēšanu. Analizējot zināmākā hercoga Jēkaba personības un darbības aprakstu un vērtējumu 20.gs. 20. – 30.gadu, trimdas un mūsdienu latviešu autoru darbos, tika konsta…
Cambios en la activación electromiográfica de la musculatura de codo en sujetos sanos comparada con la activación muscular en sujetos con tendinopatí…
2021
La tendinopatía es uno de los problemas de tendón más frecuente de lesión en la actualidad. En el caso de miembros superiores, la alteración en los tendones es bastante significativa tanto en deportistas como en personas que no practican deporte. Sin embargo, hay pocos estudios que reflejen cómo repercute esto en las personas que lo padecen. Objetivos: el objetivo de este estudio es examinar y comparar la actividad electromiografia, la fuerza y la calidad de vida en personas con alteración tendinosa epicondílea del músculo extensor corto de carpo entre personas sanas, además de comprobar el efecto de la punción seca como rama de tratamiento en la actividad muscular, fuerza y dolor. Material…
Kompression ja 2 ½-viikon korkeaintensiteettisen intervalli-harjoittelun vaikutukset naisjääkiekkoilijoiden hermo-lihasjärjestelmään
2015
Kinnunen, Juho-Ville 2015. Kompression ja 2½-viikon korkeaintensiteettisen intervalli harjoittelun vaikutukset naisjääkiekkoilijoiden hermo-lihasjärjestelmään. Liikuntabiologian laitos, Jyväskylän yliopisto. Biomekaniikan Pro gradu -tutkielma 64 s. Korkeaintensiteettinen intervalli-harjoittelu (HIIT) on yleinen harjoittelumuoto, jolla voidaan saada aikaan vasteita aineenvaihdunnallisesti sekä hermo-lihasjärjestelmässä. Harjoittelumuotoa voidaan hyödyntää muun harjoittelun lisänä ja siten saada aikaiseksi vasteita lyhyemmillä harjoitteluajoilla, kuin perinteisessä harjoitteissa. Kompressiolla on puolestaan todettu olevan vaikutuksia perättäisten räjähtävien suoritusten keskitehon kasvussa ja…
Which direction should I go? A quest for understanding the effect of TMS stimulus orientation on evoked responses
2023
The orientation of the electric field (E-field) induced by transcranial magnetic stimulation (TMS) plays a significant role in determining the magnitude of motor evoked potentials (MEP) and TMS-evoked potentials (TEP). However, fundamental mechanisms explaining the interaction of the induced E-field and the underlying neuronal populations are still largely unknown. We recently entered a quest to understand and describe neurophysiological and physical factors affecting the effect of the E-field orientation on the MEP and TEP. We developed a dual-coil TMS transducer capable of fast and accurate electronic control of the induced E-field orientation. With this transducer, we could scan the effe…