Intracortical inhibition in the soleus muscle is reduced during the control of upright standing in both young and old adults

Papegaaij, S; Baudry, S; Negyesi, J [Négyesi, János (Orvostudományok), szerző] Biomechanika Tanszék (SE / TF); Biomechanika, Kineziológia és Informatika Tanszék (TE); Taube, W; Hortobagyi, T [Hortobágyi, Tibor (Mozgástudomány), szerző]

Angol nyelvű Tudományos Szakcikk (Folyóiratcikk)
  • SJR Scopus - Medicine (miscellaneous): Q1
    PURPOSE: In a previous study, we reported that a short-interval intracortical inhibition (SICI) decreases in old but not in young adults when standing on foam vs. a rigid surface. Here, we examined if such an age by task difficulty interaction in motor cortical excitability also occurs in easier standing tasks. METHODS: Fourteen young (23 +/- 2.7 years) and fourteen old (65 +/- 4.1 years) adults received transcranial magnetic brain stimulation and peripheral nerve stimulation, while they stood with or without support on a force platform. RESULTS: In the soleus, we found that SICI was lower in unsupported (35 % inhibition) vs. supported (50 %) standing (p = 0.007) but similar in young vs. old adults (p = 0.591). In the tibialis anterior, SICI was similar between conditions (p = 0.597) but lower in old (52 %) vs. young (72 %) adults (p = 0.030). Age and standing with or without support did not affect the Hoffmann reflex in the soleus. CONCLUSIONS: The current data suggest that the motor cortex is involved in standing control, and that its role becomes more prominent with an increase in task difficulty.
    Hivatkozás stílusok: IEEEACMAPAChicagoHarvardCSLMásolásNyomtatás
    2022-01-26 11:46