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Title: Are cutaneous reflexes from the foot preserved in passive walking in a DGO?
Authors: Duysens, Jaak
Bastiaanse, C M
Dietz, V
Engelsman, Bouwien
Jansen, Karen
Jonkers, Ilse #
Issue Date: 2010
Publisher: IEEE
Host Document: IEEE Engineering in Medicine and Biology Society. Conference Proceedings vol:1 pages:3418-21
Conference: 32nd Annual International Conference of the IEEE Engineering-in-Medicine-and-Biology-Society (EMBC 10) location:Buenos Aires, ARGENTINA date:AUG 30-SEP 04, 2010
Abstract: Driven Gait Orthosis (DGO) are commonly used in gait rehabilitation. These devices commonly lack an actuator at the ankle. As a result the ankle trajectories often differ considerably from those seen normally. The question arises whether these abnormal trajectories affect the phase-dependent modulation of cutaneous reflexes from the foot. To investigate this, the sural nerve was stimulated electrically at the end of the swing phase in subjects walking "passively" in a DGO. It was found that the tibialis anterior was less active at end swing during this type of walking and that the reflex induced suppression was absent. It is concluded that the normally occurring suppression does not depend on interactions from other sensory sources (since these are still present in "passive" walking). Instead the suppression is likely to depend on cortical activations. Training of these cortical activations may be reduced in current DGO walking and therefore it is argued that normalization of the ankle trajectory in future designs of DGO's could have a beneficial effect.
ISBN: 978-1-4244-4124-2
ISSN: 1557-170X
Publication status: published
KU Leuven publication type: IC
Appears in Collections:Movement Control & Neuroplasticity Research Group
Production Engineering, Machine Design and Automation (PMA) Section
# (joint) last author

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