Modulations of corticospinal excitability following rapid ankle dorsiflexion in skill- and endurance-trained athletes
Deutscher übersetzter Titel: | Modulationen der kortikospinalen Erregbarkeit nach schneller Dorsalflexion des Sprunggelenks bei geschicklichkeits- und ausdauertrainierten Athleten |
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Autor: | Hu, Nijia; Avela, Janne; Kidgell, Dawson John; Piirainen, Jarmo M.; Walker, Simon |
Erschienen in: | European journal of applied physiology |
Veröffentlicht: | 122 (2022), 9, S. 2099-2109, Lit. |
Format: | Literatur (SPOLIT) |
Publikationstyp: | Zeitschriftenartikel |
Medienart: | Elektronische Ressource (online) Gedruckte Ressource |
Sprache: | Englisch |
ISSN: | 1439-6319, 0301-5548 |
DOI: | 10.1007/s00421-022-04981-9 |
Schlagworte: | |
Online Zugang: | |
Erfassungsnummer: | PU202209006483 |
Quelle: | BISp |
Abstract des Autors
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 ankle dorsiflexion. Motor evoked potential (MEP), short-latency intracortical inhibition (SICI), intracortical facilitation (ICF), and long-latency intracortical inhibition (LICI) were recorded by surface electromyography from the soleus muscle. Results: Compared to immediately before ankle dorsiflexion (Onset), TMS induced significantly greater MEPs during the supraspinal reaction period (~ 120 ms after short-latency reflex, SLR) in the skill group only (from 1.7 ± 1.0 to 2.7 ± 1.8%M-max, P = 0.005) despite both conditions being passive. ICF was significantly greater over all latencies in skill than endurance athletes (F (3, 45) = 4.64, P = 0.007), although no between-group differences for stimulations at specific latencies (e.g., at SLR) were observed. Conclusion: The skill group showed higher corticospinal excitability during the supraspinal reaction phase, which may indicate a “priming” of corticospinal excitability following rapid ankle dorsiflexion for a supraspinal reaction post-stretch, which appears absent in endurance-trained athletes.