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Cortical and spinal adaptations induced by balance training : correlation between stance stability and corticospinal activation

Cortical and spinal adaptations induced by balance training : correlation between stance stability and corticospinal activation

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TAUBE, Wolfgang, Markus GRUBER, Sandra BECK, Michael FAIST, Albert GOLLHOFER, Martin SCHUBERT, 2007. Cortical and spinal adaptations induced by balance training : correlation between stance stability and corticospinal activation. In: Acta Physiologica. 189(4), pp. 347-358. ISSN 1748-1708. eISSN 1748-1716. Available under: doi: 10.1111/j.1748-1716.2007.01665.x

@article{Taube2007Corti-16977, title={Cortical and spinal adaptations induced by balance training : correlation between stance stability and corticospinal activation}, year={2007}, doi={10.1111/j.1748-1716.2007.01665.x}, number={4}, volume={189}, issn={1748-1708}, journal={Acta Physiologica}, pages={347--358}, author={Taube, Wolfgang and Gruber, Markus and Beck, Sandra and Faist, Michael and Gollhofer, Albert and Schubert, Martin} }

Taube, Wolfgang eng Publ. in: Acta Physiologica ; 189 (2007), 4. - S. 347-358 2011-12-02T08:58:40Z Gollhofer, Albert Taube, Wolfgang Beck, Sandra Schubert, Martin deposit-license Schubert, Martin Aim:  To determine the sites of adaptation responsible for improved stance stability after balance (=sensorimotor) training, changes in corticospinal and spinal excitability were investigated in 23 healthy subjects.<br /><br /><br /><br />Methods:  Neural adaptations were assessed by means of H-reflex stimulation, transcranial magnetic stimulation (TMS) and conditioning of the H-reflex by TMS (H<sub>cond</sub>) before and after 4 weeks of balance training. All measurements were performed during stance perturbation on a treadmill. Fast posterior translations induced short- (SLR), medium- and long-latency responses (LLR) in the soleus muscle. Motor-evoked potential- (MEP) and H<sub>cond</sub>-amplitudes as well as H<sub>max</sub>IM<sub>max</sub> ratios were determined at SLR and LLR. Postural stability was measured during perturbation on the treadmill.<br /><br /><br /><br />Results:  Balance training improved postural stability. H<sub>max</sub>IM<sub>max</sub> ratios were significantly decreased at LLR. MEPs and H<sub>cond</sub> revealed significantly reduced facilitation at LLR following training. A negative correlation between adaptations of H<sub>cond</sub> and changes in stance stability was observed (r = −0.87; P < 0.01) while no correlation was found between stance stability and changes in H<sub>max</sub>IM<sub>max</sub> ratio. No changes in any parameter occurred at the spinally organized SLR and in the control group.<br /><br /><br /><br />Conclusion:  The decrease in MEP- and H<sub>cond</sub>-facilitation implies reduced corticospinal and cortical excitability at the transcortically mediated LLR. Changes in cortical excitability were directly related to improvements in stance stability as shown by correlation of these parameters. The absence of such a correlation between H<sub>max</sub>IM<sub>max</sub> ratios and stance stability suggests that mainly supraspinal adaptations contributed to improved balance performance following training. Gruber, Markus Cortical and spinal adaptations induced by balance training : correlation between stance stability and corticospinal activation 2007 Faist, Michael Beck, Sandra 2011-12-02T08:58:40Z Faist, Michael Gruber, Markus Gollhofer, Albert

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