Abstract
In this study we examined the functionality of the contralateral biceps femoris (cBF) reflex response following ipsilateral knee extension joint rotations during the late stance phase of the gait cycle [1]. Stevenson et al. [1] proposed that the cBF reflex acts to slow the forward progression of the body in order to maintain dynamic equilibrium during walking. Therefore, we hypothesized that if we suddenly slowed the treadmill participants were walking on, the cBF reflex would be inhibited because the necessity to break the forward progression of the body would be decreased. Conversely, if we suddenly sped up the treadmill, the breaking requirement would be greater and the cBF reflex would be larger. We found this to be the case when the treadmill velocity was suddenly changed either 100 ms or 50 ms prior to the onset of the ipsilateral knee perturbations. The cBF reflex was unchanged when the treadmill velocity was altered concurrently or 50 ms after knee perturbation onset. These results, together with the finding that the cBF reflex response is under some cortical control [1], strongly suggest a functional role for the cBF reflex during walking that is adaptable to the environmental situation.
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Stevenson, A.J.T., Geertsen, S.S., Sinkjær, T., Nielsen, J.B., Mrachacz-Kersting, N. (2014). Functionality of the Contralateral Biceps Femoris Reflex Response during Human Walking. In: Jensen, W., Andersen, O., Akay, M. (eds) Replace, Repair, Restore, Relieve – Bridging Clinical and Engineering Solutions in Neurorehabilitation. Biosystems & Biorobotics, vol 7. Springer, Cham. https://doi.org/10.1007/978-3-319-08072-7_106
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DOI: https://doi.org/10.1007/978-3-319-08072-7_106
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-08071-0
Online ISBN: 978-3-319-08072-7
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