Search results for "liike"
showing 10 items of 784 documents
Proprioceptive response strength in the primary sensorimotor cortex is invariant to the range of finger movement
2023
Available online 13 February 2023 Proprioception is the sense of body position and movement that relies on afference from the proprioceptors in muscles and joints. Proprioceptive responses in the primary sensorimotor (SM1) cortex can be elicited by stim- ulating the proprioceptors using evoked (passive) limb movements. In magnetoencephalography (MEG), propri- oceptive processing can be quantified by recording the movement evoked fields (MEFs) and movement-induced beta power modulations or by computing corticokinematic coherence (CKC) between the limb kinematics and cortical activity. We examined whether cortical proprioceptive processing quantified with MEF peak strength, relative beta supp…
Corticokinematic coherence is stronger to regular than irregular proprioceptive stimulation of the hand
2021
Funding Information: This study was supported by the Academy of Finland “Brain changes across the life-span” profiling funding to University of Jyva€skyla€. H. Piitulainen was supported by Academy of Finland (Grants 296240, 326988, 307250, and 327288) and Jane and Aatos Erkko Foundation. Publisher Copyright: © 2021 the American Physiological Society. Proprioceptive afference can be investigated using corticokinematic coherence (CKC), which indicates coupling between limb kinematics and cortical activity. CKC has been quantified using proprioceptive stimulation (movement actuators) with fixed interstimulus interval (ISI). However, it is unclear how regularity of the stimulus sequence (jitter…
Laboratory-Based Gait Variability and Habitual Gait Entropy Do Not Differentiate Community-Dwelling Older Adults from Those with Subjective Memory Co…
2020
Background Age-related cognitive decline may be delayed with appropriate interventions if those at high risk can be identified prior to clinical symptoms arising. Gait variability assessment has emerged as a promising candidate prognostic indicator, however, it remains unclear how sensitive gait variability is to early changes in cognitive abilities. Research question Do community-dwelling adults over 65 years of age with subjective memory complaints differ from those with no subjective memory concerns in terms of laboratory-measured or free-living gait variability? Methods This cross-sectional study recruited 24 (age = 73.5(SD 6.4) years) community-dwelling people with subjective memory co…
Multicriteria Decision Aiding for Planning Renewable Power Production at Moroccan Airports
2022
This study is about multicriteria decision aiding (MCDA) for the green airports program of the Moroccan Airport Authority ONDA. The goal of the program is to develop significant amounts of renewable power at airports. In particular, ONDA wants to select airports at which large solar and wind power parks should be built. Multiple criteria, including economy, technical feasibility, and environmental concerns, must be considered simultaneously. In this study, we apply Stochastic Multicriteria Acceptability Analysis (SMAA) for ranking the candidates to be developed into green airports. The analysis is conducted in phases with different sets of criteria. This study is the first application of MC…
Association of body composition, physical activity and fracture history on postural sway in girls
2012
Hyvä tasapainon hallinta on tärkeää normaalien päivittäisten askareiden suorittamiseksi. Nuorten tasapainotutkimuksia löytyy vain vähän. Tämän työn tarkoituksena oli tutkia, voiko lapsuus‐ ja nuoruusiän murtumilla ja vartalon huojunnalla aikuisuuden kynnyksellä olla yhteys, ja onko fyysisellä aktiivisuudella, alaraajan voimalla ja kehon koostumuksella yhteys vartalon huojuntaan. Kaikkiaan 212 Jyväskylän seudulla asuvaa tyttöä (keskimääräinen ikä 18.6±1.1) osallistui tutkimukseen. Vartalon huojuntaa mitattiin voimalevyllä, kehon koostumus mitattiin sekä konventionaalisesti että DXA‐laitteella, ja alaraajan voima mitattiin maksimaalisella isometrisellä polven ojennustestillä sekä vauhdittomal…
Effects of barbell back squat stance width on sagittal and frontal hip & knee kinetics
2019
Different stance widths are commonly utilized when completing the barbell back squat during athletic general preparedness training. Width manipulation is thought to influence sagittal plane stimuli to the hip and knee extensors, the primary extensor musculature in the squat. However, how width manipulation affects frontal plane stimuli is less understood. Knowledge of hip and knee net joint moments (NJM) could improve exercise selection when aiming to improve sport‐specific performance and prevent injuries. Fourteen adult amateur rugby athletes were recruited for this study. After a familiarization period, participants performed wide‐ (WIDE, 1.5× greater trochanter width) and narrow‐stance …
Biomechanical factors affecting energy cost during running utilising different slopes
2020
This study aimed to examine the characteristics of electromyography (EMG) and kinematics of the supporting leg affecting energy cost while running at incline, level, and decline slopes. Twelve male Japanese middle- and long-distance runners volunteered for this study. The subjects were asked to run at 13.5 km·h−1 on a treadmill under three slope conditions. Sagittal plane kinematics and the EMG of the lower limb muscles, respiratory gases were recorded. Energy cost differed significantly between slopes, being the lowest in decline slope and the greatest in incline slope. Integrated EMG (iEMG) of leg extensor muscles was greater in the incline slope than in the decline slope, and iEMG of the…
Brain and body percussion : the relationship between motor and cognitive functions
2015
The focus of this thesis is the relationship between embodied motor rhythmic exercises (e.g. body percussion) and executive functions. Decades’ long successful application of this method within general classrooms and in music education led to the hypothesis that body percussion could have a positive impact on core cognitive functions also referred to as executive functions. Two pilot experiments were conducted to test proper settings for investigating the above-mentioned relationship. Experiment 1 piloted the use of neuropsychological tests with pre- and post-measures of the Tower of London (TOL) neuropsychological test. Experiment 2 piloted the use of an electroencephalography (EEG) device…
Myyjiä, tuotekehittäjiä ja tuotejohtajia : tuotepäälliköiden tehtävärakenteen heijastuminen tuotekehitysprojektissa sisäiseen yrittäjyyteen ja intuit…
2004
The focus of the present study is on product managers’ responsibilities and job roles in product development projects. The aim of the research is to define how these responsibilities and job roles reflect joint intrapreneurial and intuitive characteristics in product development.The approach is quantitative. The concepts of product manager, product managers’ responsibilities and job roles, intrapreneurship and intuitive decision making style are defined in the framework. Product development project is an innovation process that lasts two to three years. Goals in this kind of projects are typically commercially successful products. Product development projects are based on team organizations…
Huojunnan yhteys kaatumisen seurauksena syntyneisiin murtumiin ikääntyneillä naisilla
2013
TIIVISTELMÄ Huojunnan yhteys kaatumisen seurauksena syntyneisiin murtumiin ikääntyneillä naisilla Mahsa Modarress Jyväskylän yliopisto Liikuntatieteellinen tiedekunta Terveystieteiden laitos Syksy 2013 48 sivua Liikunta- ja toimintakykyä voidaan pitää keskeisenä osana ihmisen hyvinvointia ja terveyttä. Ikääntymisen myötä lihasvoima ja -kestävyys sekä aistitoiminnat heikkenevät vaikuttaen negatiivisesti liikehallintaan ja sitä kautta tasapainoon, jolloin myös kaatumisriski kasvaa. Samanaikaisesti vanhenevassa elimistössä tapahtuvat biologiset ja biokemialliset muutokset johtavat luuston haurastumiseen, joka puolestaan altistaa murtumille ja niitä seuraaville terveyshaitoille; liiallinen haur…