Reliability of corticospinal excitability and intracortical inhibition in biceps femoris during different contraction modes
Journal article
Presland, Joel D., Tofari, Paul J., Timmins, Ryan G., Kidgell, Dawson J. and Opar, David A.. (2023). Reliability of corticospinal excitability and intracortical inhibition in biceps femoris during different contraction modes. European Journal of Neuroscience. 57(1), pp. 91-105. https://doi.org/10.1111/ejn.15868
Authors | Presland, Joel D., Tofari, Paul J., Timmins, Ryan G., Kidgell, Dawson J. and Opar, David A. |
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Abstract | This study aimed to determine the test–retest reliability of a range of transcranial magnetic stimulation (TMS) outcomes in the biceps femoris during isometric, eccentric and concentric contractions. Corticospinal excitability (active motor threshold 120% [AMT120%] and area under recruitment curve [AURC]), short- and long-interval intracortical inhibition (SICI and LICI) and intracortical facilitation (ICF) were assessed from the biceps femoris in 10 participants (age 26.3 ± 6.0 years; height 180.2 ± 6.6 cm, body mass 77.2 ± 8.0 kg) in three sessions. Single- and paired-pulse stimuli were delivered under low-level muscle activity (5% ± 2% of maximal isometric root mean squared surface electromyography [rmsEMG]) during isometric, concentric and eccentric contractions. Participants were provided visual feedback on their levels of rmsEMG during all contractions. Single-pulse outcomes measured during isometric contractions (AURC, AMT110%, AMT120%, AMT130%, AMT150%, AMT170%) demonstrated fair to excellent reliability (ICC range, .51 to .92; CV%, 21% to 37%), whereas SICI, LICI and ICF demonstrated good to excellent reliability (ICC range, .62 to .80; CV%, 19 to 42%). Single-pulse outcomes measured during concentric contractions demonstrated excellent reliability (ICC range, .75 to .96; CV%, 15% to 34%), whereas SICI, LICI and ICF demonstrated good to excellent reliability (ICC range, .65 to .76; CV%, 16% to 71%). Single-pulse outcomes during eccentric contractions demonstrated fair to excellent reliability (ICC range, .56 to .96; CV%, 16% to 41%), whereas SICI, LICI and ICF demonstrated good to excellent (ICC range, .67 to .86; CV%, 20% to 42%). This study found that both single- and paired-pulse TMS outcomes can be measured from the biceps femoris muscle across all contraction modes with fair to excellent reliability. However, coefficient of variation values were typically greater than the smallest worthwhile change which may make tracking physiological changes in these variables difficult without moderate to large effect sizes. |
Keywords | hamstring; intracortical facilitation; intracortical inhibition; isokinetic dynamometry; transcranial magnetic stimulation |
Year | 2023 |
Journal | European Journal of Neuroscience |
Journal citation | 57 (1), pp. 91-105 |
Publisher | John Wiley & Sons Ltd |
ISSN | 0953-816X |
Digital Object Identifier (DOI) | https://doi.org/10.1111/ejn.15868 |
PubMed ID | 36382424 |
Scopus EID | 2-s2.0-85144052266 |
PubMed Central ID | PMC10107877 |
Open access | Published as ‘gold’ (paid) open access |
Page range | 91-105 |
Funder | Research Training Program Scholarship (RTP), Australian Government |
Publisher's version | License File Access Level Open |
Output status | Published |
Publication dates | |
Online | 07 Dec 2022 |
Publication process dates | |
Accepted | 09 Nov 2022 |
Deposited | 19 Jun 2023 |
https://acuresearchbank.acu.edu.au/item/8z261/reliability-of-corticospinal-excitability-and-intracortical-inhibition-in-biceps-femoris-during-different-contraction-modes
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Publisher's version
OA_Presland_2022_Reliability_of_corticospinal_excitability_and_intracortical.pdf | |
License: CC BY 4.0 | |
File access level: Open |
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