Search results for "refleksit"

Revising the stretch reflex threshold method to measure stretch hyperreflexia in cerebral palsy

2022

Funding Information: This work was supported by the Olvi Foundation, Research Foundation of Cerebral Palsy Alliance (PHD00321), Finnish Cultural Foundation, University of Jyväskylä, Academy of Finland (grants #296240, #307250, #327288, #311877, #326988), including “Brain changes across the life-span” profiling funding to University of Jyväskylä, Jane and Aatos Erkko Foundation (#602.274), and the Netherlands Organization for Scientific Research (NWO-016.186.144). Ministry of Education and Culture (OKM/28/626/2022). Hyper-resistance is an increased resistance to passive muscle stretch, a common feature in neurological disorders. Stretch hyperreflexia, an exaggerated stretch reflex response, …

Nelipistevyötuennan vaikutus ylävartalon lihasaktiivisuuteen, selkälihasten refleksivasteeseen ja lihasväsymykseen työkoneperäisessä tärinäaltistukse…

2013

Jylänki, Juha Petteri 2013. Nelipistevyötuennan vaikutus ylävartalon lihasaktiivisuuteen, selkälihasten refleksivasteeseen ja lihasväsymykseen työkoneperäisessä tärinäaltistuksessa. Liikuntabiologian laitos, Vuotech, Jyväskylän Yliopisto. Biomekaniikan pro gradu –tutkielma, 94 s. Tämän tutkimuksen tarkoituksena oli selvittää nelipistevyön tuennan merkitys pitkäkestoisessa (7x8 min) työkoneperäisessä tärinäaltistuksessa. Tuennan vaikutusta tutkittiin mittaamalla altistuksen aiheuttamaa lihasaktiivisuutta altistuksen aikana, sekä altistuksen jälkeistä lihasväsymystä. Tutkimuksessa pyrittiin hakemaan myös yhteyttä lihasaktiivisuuden ja koehenkilöiden kokeman subjektiivisen rasituksen välillä. …

Modulation of H-reflex and V-wave responses during dynamic balance perturbations

2023

AbstractMotoneuron excitability is possible to measure using H-reflex and V-wave responses. However, it is not known how the motor control is organized, how the H-reflex and V-wave responses modulate and how repeatable these are during dynamic balance perturbations. To assess the repeatability, 16 participants (8 men, 8 women) went through two, identical measurement sessions with ~ 48 h intervals, where maximal isometric plantar flexion (IMVC) and dynamic balance perturbations in horizontal, anterior–posterior direction were performed. Soleus muscle (SOL) neural modulation during balance perturbations were measured at 40, 70, 100 and 130 ms after ankle movement by using both H-reflex and V-…

Effect of emotional picture viewing on classical eyeblink conditioning

2004

Hermolihasjärjestelmän mukautuminen toistuviin hypertrofistyyppisiin venymis-lyhenemissyklin sisältämiin voimaharjoituksiin

2000

Reliability of transcranial magnetic stimulation and H-reflex measurement during balance perturbation tasks

2022

Following ankle movement, posterior balance perturbation evokes short- (SLR ∼30–50 ms), medium- (MLR ∼50–60 ms), and long-latency responses (LLR ∼70–90 ms) in soleus muscle before voluntary muscle contraction. Transcranial magnetic stimulation (TMS) and Hoffmann-reflex (H-reflex) measurements can provide insight into the contributions of corticospinal and spinal mechanisms to each response. Motor evoked potential (MEP) and H-reflex responses have shown good reliability in some dynamic muscle contraction tasks. However, it is still unclear how reliable these methods are in dynamic balance perturbation and corticospinal modulation during long amplitude balance perturbation tasks. 14 subjects …

Eturistisidevamman vaikutukset tasapainoon ja refleksitoimintaan

2005

Stretch reflex modulation during exercise and fatigue

2003

Modulations of corticospinal excitability following rapid ankle dorsiflexion in skill- and endurance-trained athletes

2022

Abstract Purpose Long-term sports training, such as skill and endurance training, leads to specific neuroplasticity. However, it remains unclear if muscle stretch-induced proprioceptive feedback influences corticospinal facilitation/inhibition differently between skill- and endurance-trained athletes. This study investigated modulation of corticospinal excitability following rapid ankle dorsiflexion between well-trained skill and endurance athletes. Methods Ten skill- and ten endurance-trained athletes participated in the study. Corticospinal excitability was tested by single- and paired-pulse transcranial magnetic stimulations (TMS) at three different latencies following passive rapid ankl…