Search results for "Motor"
showing 10 items of 3137 documents
More comprehensive proprioceptive stimulation of the hand amplifies its cortical processing
2021
Corticokinematic coherence (CKC) quantifies the phase coupling between limb kinematics and cortical neurophysiological signals reflecting proprioceptive feedback to the primary sensorimotor (SM1) cortex. We studied whether the CKC strength or cortical source location differs between proprioceptive stimulation (i.e., actuator-evoked movements) of right-hand digits (index, middle, ring, and little). Twenty-one volunteers participated in magnetoencephalography measurements during which three conditions were tested: 1) simultaneous stimulation of all four fingers at the same frequency, 2) stimulation of each finger separately at the same frequency, and 3) simultaneous stimulation of the fingers…
Identification of proprioceptive thalamocortical tracts in children: comparison of fMRI, MEG, and manual seeding of probabilistic tractography
2022
Publisher Copyright: © The Author(s) 2022. Published by Oxford University Press. Studying white matter connections with tractography is a promising approach to understand the development of different brain processes, such as proprioception. An emerging method is to use functional brain imaging to select the cortical seed points for tractography, which is considered to improve the functional relevance and validity of the studied connections. However, it is unknown whether different functional seeding methods affect the spatial and microstructural properties of the given white matter connection. Here, we compared functional magnetic resonance imaging, magnetoencephalography, and manual seedin…
Reproducibility of evoked and induced MEG responses to proprioceptive stimulation of the ankle joint
2022
Cortical processing of proprioceptive afference can be investigated by examining phase locked evoked and induced responses in cortical signals to passive movement stimuli. Reproducibility of evoked and induced responses has been studied using electroencephalography (EEG), but proprioceptive domain has received little attention. It is unclear whether evoked and induced responses to proprioceptive stimulation arising from the lower limbs are reproducible using magnetoencephalography (MEG). Nineteen healthy volunteers (18 right-foot dominant, 36.1 ± 6.6 yr, 7 females) were measured in two MEG sessions separated by 9 ± 5 days in which their right ankle was rotated intermittently using a pneumat…
Spatiotemporal dynamics of activation in motor and language areas suggest a compensatory role of the motor cortex in second language processing
2023
The involvement of the motor cortex in language understanding has been intensively discussed in the framework of embodied cognition. Although some studies have provided evidence for the involvement of the motor cortex in different receptive language tasks, the role that it plays in language perception and understanding is still unclear. In the present study, we explored the degree of involvement of language and motor areas in a visually presented sentence comprehension task, modulated by language proficiency (L1: native language, L2: second language) and linguistic abstractness (literal, metaphorical, and abstract). Magnetoencephalography data were recorded from 26 late Chinese learners of …
Attention directed to proprioceptive stimulation alters its cortical processing in the primary sensorimotor cortex.
2021
Funding Information: This study has been supported by the Academy of Finland ”Brain changes across the life‐span” profiling funding to University of Jyväskylä (grant #311877). HP was supported by Academy of Finland (grants #296240, #326988, #307250 and #327288) to HP and Jane and Aatos Erkko Foundation (grant #602.274). Publisher Copyright: © 2021 The Authors. European Journal of Neuroscience published by Federation of European Neuroscience Societies and John Wiley & Sons Ltd. Copyright: Copyright 2021 Elsevier B.V., All rights reserved. Movement-evoked fields to passive movements and corticokinematic coherence between limb kinematics and magnetoencephalographic signals can both be used to …
Motor imagery in unipolar major depression
2014
International audience; Background: Motor imagery is a potential tool to investigate action representation, as it can provide insights into the processes of action planning and preparation. Recent studies suggest that depressed patients present specific impairment in mental rotation. The present study was designed to investigate the influence of unipolar depression on motor imagery ability. Methods: Fourteen right-handed patients meeting DSM-IV criteria for unipolar depression were compared to 14 matched healthy controls. Imagery ability was accessed by the timing correspondence between executed and imagined movements during a pointing task, involving strong spatiotemporal constraints (spee…
TRATTAMENTO DELLE FRATTURE MALLEOLARI
2010
La caviglia è un’articolazione complessa, nella quale sia le strutture ossee che quellelegamentose svolgono un ruolo importante per la funzione e la stabilità, che sono strettamente dipendenti dall’integrità strutturale dell’articolazione. Le fratture malleolarirappresentano oggi circa il 38% di tutti i traumi dell’arto inferiore e, nella maggior partedei casi, sono la conseguenza di forze di tipo rotazionale ed a bassa energia. Lo scopodel trattamento ortopedico è quello di garantire la stabilità dell’articolazione tibiotarsica ristabilendo i normali rapporti anatomici; così si ripristina la biomeccanica e,quindi, la funzionalità della caviglia. Nell’approccio al paziente è essenziale un m…
Fyysinen aktiivisuus, harrastustoiminta ja liikkumiskyky iäkkäiden ihmisten psyykkisen hyvinvoinnin ennustajina : 65-84-vuotiaiden jyväskyläläisten 8…
2004
Päivi Lampinen selvitti fyysisen aktiivisuuden, harrastustoiminnan ja liikkumiskyvyn yhteyksiä 65–84-vuotiaiden jyväskyläläisten kotona asuvien miesten ja naisten psyykkiseen hyvinvointiin kahdeksan vuoden seuruututkimuksen aikana. Lisäksi hän tutki näiden tekijöiden ja niiden välisten yhteyksien taustalla olevia tekijöitä, kuten kroonisia sairauksia, päivittäistä toimintakykyä ja sosiodemografisia tekijöitä. The purpose of this prospective study was to examine the roles of activity and mobility status as associates and predictors of mental well-being among older adults over an 8-year period. In addition, the aim was to explore the individual-related factors underlying the associations betw…
Sīkās motorikas attīstības veicināšana bērniem līdz 3 gadu vecumam
2020
Olgas Tretjakas kvalifikācijas darbā “Sīkās motorikas attīstības veicināšana bērniem līdz 3 gadu vecumam” mērķis ir teorētiski un praktiski pētīt sīkās motorikas attīstības veicināšanu bērniem līdz 3 gadu vecumam. Pētījumā tika ņemtas vērā teorētiskās nostādnes par bērnu attīstības īpatnībām mazbērna periodā. Ir apkopotas rotaļas, kas attīsta bērniem sīko motoriku un izmantojamas pirmsskolas procesā. Lai pedagoģiskajā novērošanā vērtētu bērnu sīkās motorikas attīstību, balstoties teorētiskajos pētījumos, tika izvirzīti kritēriji, atlasītas atbilstošas rotaļas, aktivitātes, dažādas tehnikas, kas apvienotas rotaļās, kuras attīsta bērniem sīko motoriku. Atslēgvārdi: Sīkā motorika, bērnu vecump…