| | SLO | ENG | Piškotki in zasebnost

Večja pisava | Manjša pisava
Prva stran > Izpis gradiva

Izpis gradiva Pomoč

Naslov:Motor unit discharge rate modulation during isometric contractions to failure is intensity- and modality-dependent
Avtorji:ID Valenčič, Tamara (Avtor)
ID Ansdell, Paul (Avtor)
ID Brownstein, Callum G. (Avtor)
ID Spillane, Padraig M. (Avtor)
ID Holobar, Aleš (Avtor)
ID Škarabot, Jakob (Avtor)
Datoteke:URL https://physoc.onlinelibrary.wiley.com/doi/10.1113/JP286143
 
.pdf The_Journal_of_Physiology_-_2024_-_Valencic_-_Motor_unit_discharge_rate_modulation_during_isometric_contractions_to_failure.pdf (3,77 MB)
MD5: 89E25EBBC3D02CD031078552DDA3C59D
 
Jezik:Angleški jezik
Vrsta gradiva:Članek v reviji
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:FERI - Fakulteta za elektrotehniko, računalništvo in informatiko
Opis:The physiological mechanisms determining the progressive decline in the maximal muscle torque production capacity during isometric contractions to task failure are known to depend on task demands. Task-specificity of the associated adjustments in motor unit discharge rate (MUDR), however, remains unclear. This study examined MUDR adjustments during different submaximal isometric knee extension tasks to failure. Participants performed a sustained and an intermittent task at 20% and 50% of maximal voluntary torque (MVT), respectively (Experiment 1). High-density surface EMG signals were recorded from vastus lateralis (VL) and medialis (VM) and decomposed into individual MU discharge timings, with the identified MUs tracked from recruitment to task failure. MUDR was quantified and normalised to intervals of 10% of contraction time (CT). MUDR of both muscles exhibited distinct modulation patterns in each task. During the 20% MVT sustained task, MUDR decreased until ∼50% CT, after which it gradually returned to baseline. Conversely, during the 50% MVT intermittent task, MUDR remained stable until ∼40–50% CT, after which it started to continually increase until task failure. To explore the effect of contraction intensity on the observed patterns, VL and VM MUDR was quantified during sustained contractions at 30% and 50% MVT (Experiment 2). During the 30% MVT sustained task, MUDR remained stable until ∼80–90% CT in both muscles, after which it continually increased until task failure. During the 50% MVT sustained task the increase in MUDR occurred earlier, after ∼70–80% CT. Our results suggest that adjustments in MUDR during submaximal isometric contractions to failure are contraction modality- and intensity-dependent.
Ključne besede:muscle contractions, high-density EMG signals, electromyiograms
Datum objave:15.04.2024
Založnik:Wiley
Leto izida:2024
Št. strani:Str. 2287-2314
Številčenje:Vol. 602, iss. 10
PID:20.500.12556/DKUM-90160 Novo okno
UDK:61:004.8
COBISS.SI-ID:192788739 Novo okno
DOI:10.1113/JP286143 Novo okno
ISSN pri članku:1469-7793
Datum objave v DKUM:23.08.2024
Število ogledov:117
Število prenosov:10
Metapodatki:XML DC-XML DC-RDF
Področja:Ostalo
:
VALENČIČ, Tamara, ANSDELL, Paul, BROWNSTEIN, Callum G., SPILLANE, Padraig M., HOLOBAR, Aleš in ŠKARABOT, Jakob, 2024, Motor unit discharge rate modulation during isometric contractions to failure is intensity- and modality-dependent. The journal of physiology [na spletu]. 2024. Vol. 602, no. 10, p. 2287–2314. [Dostopano 6 april 2025]. DOI 10.1113/JP286143. Pridobljeno s: https://dk.um.si/IzpisGradiva.php?lang=slv&id=90160
Kopiraj citat
  
Skupna ocena:
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
(0 glasov)
Vaša ocena:Ocenjevanje je dovoljeno samo prijavljenim uporabnikom.
Objavi na:Bookmark and Share



Podobna dela iz ostalih repozitorijev:

Ni podobnih del

Postavite miškin kazalec na naslov za izpis povzetka. Klik na naslov izpiše podrobnosti ali sproži prenos.

Gradivo je del revije

Naslov:The journal of physiology
Skrajšan naslov:J. physiol.
Založnik:Cambridge University Press
ISSN:1469-7793
COBISS.SI-ID:515030553 Novo okno

Gradivo je financirano iz projekta

Financer:ARIS - Javna agencija za znanstvenoraziskovalno in inovacijsko dejavnost Republike Slovenije
Številka projekta:J2-1731
Naslov:Dekompozicija sestavljenih mišičnih potencialov
Financer:ARIS - Javna agencija za znanstvenoraziskovalno in inovacijsko dejavnost Republike Slovenije
Številka projekta:P2-0041
Naslov:Računalniški sistemi, metodologije in inteligentne storitve

Sekundarni jezik

Jezik:Slovenski jezik
Ključne besede:elektromiogrami, signali EMG, kontrakcija mišic


Komentarji

Dodaj komentar

Za komentiranje se morate prijaviti.

Komentarji (0)
0 - 0 / 0
 
Ni komentarjev!

Nazaj
Logotipi partnerjev Univerza v Mariboru Univerza v Ljubljani Univerza na Primorskem Univerza v Novi Gorici