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. 2013 Jun 10;591(Pt 16):4003–4025. doi: 10.1113/jphysiol.2013.255943

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© 2013 The Authors. The Journal of Physiology published by John Wiley & Sons Ltd on behalf of The Physiological Society. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

© 2013 The Authors. The Journal of Physiology published by John Wiley & Sons Ltd on behalf of The Physiological Society. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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Six unit classes derived from the 18 extracted parameter clustering are indicated in the legend and are as in Figs 7 and 11.