TY  - JOUR
A1  - Müller, Juliane
A1  - Müller, Steffen
A1  - Engel, Tilman
A1  - Reschke, Antje
A1  - Baur, Heiner
A1  - Mayer, Frank
T1  - Stumbling reactions during perturbed walking: Neuromuscular reflex activity and 3-D kinematics of the trunk - A pilot study
JF  - Journal of biomechanics
N2  - Stumbling led to an increase in ROM, compared to unperturbed gait, in all segments and planes. These increases ranged between 107 +/- 26% (UTA/rotation) and 262 +/- 132% (UTS/lateral flexion), significant only in lateral flexion. EMG activity of the trunk was increased during stumbling (abdominal: 665 +/- 283%; back: 501 +/- 215%), without significant differences between muscles. Provoked stumbling leads to a measurable effect on the trunk, quantifiable by an increase in ROM and EMG activity, compared to normal walking. Greater abdominal muscle activity and ROM of lateral flexion may indicate a specific compensation pattern occurring during stumbling. (C) 2015 Elsevier Ltd. All rights reserved.
KW  - Trunk kinematics
KW  - Treadmill walking
KW  - Gait perturbation
KW  - EMG
Y1  - 2016
U6  - https://doi.org/10.1016/j.jbiomech.2015.09.041
SN  - 0021-9290
SN  - 1873-2380
VL  - 49
SP  - 933
EP  - 938
PB  - Elsevier
CY  - Oxford
ER  - 
TY  - JOUR
A1  - König, Niklas
A1  - Reschke, Antje
A1  - Wolter, Martin
A1  - Müller, Steffen
A1  - Mayer, Frank
A1  - Baur, Heiner
T1  - Plantar pressure trigger for reliable nerve stimulus application during dynamic H-reflex measurements
JF  - Gait & posture
N2  - In dynamic H-reflex measurements, the standardisation of the nerve stimulation to the gait cycle is crucial to avoid misinterpretation due to altered pre-synaptic inhibition. In this pilot study, a plantar pressure sole was used to trigger the stimulation of the tibialis nerve with respect to the gait cycle. Consequently, the intersession reliability of the soleus muscle H-reflex during treadmill walking was investigated.
 Seven young participants performed walking trials on a treadmill at 5 km/h. The stimulating electrode was placed on the tibial nerve in the popliteal fossa. An EMG was recorded from the soleus muscle. To synchronize the stimulus to the gait cycle, initial heel strike was detected with a plantar pressure sole. Maximum H-reflex amplitude and M-wave amplitude were obtained and the Hmax/Mmax ratio was calculated.
 Data reveals excellent reliability, ICC = 0.89. Test-retest variability was 13.0% (+/- 11.8). The Bland-Altman analysis showed a systematic error of 2.4%.
 The plantar pressure sole was capable of triggering the stimulation of the tibialis nerve in a reliable way and offers a simple technique for the evaluation of reflex activity during walking.
KW  - Monosynaptic reflexes
KW  - Reflex reproducibility
KW  - Treadmill walking
Y1  - 2013
U6  - https://doi.org/10.1016/j.gaitpost.2012.09.021
SN  - 0966-6362
VL  - 37
IS  - 4
SP  - 637
EP  - 639
PB  - Elsevier
CY  - Clare
ER  -