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. 2017 Apr 5;3(2):2055217317701317. doi: 10.1177/2055217317701317

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© The Author(s) 2017

This article is distributed under the terms of the Creative Commons Attribution-NonCommercial 3.0 License (http://www.creativecommons.org/licenses/by-nc/3.0/) which permits non-commercial use, reproduction and distribution of the work without further permission provided the original work is attributed as specified on the SAGE and Open Access pages (https://us.sagepub.com/en-us/nam/open-access-at-sage).

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Figure 4. — Sympathetic system is ineffective in worsening multiple sclerosis (MS). Active not relapsing patients showed a higher increase of low frequency power (LFnu) after head-up tilt test (HUTT) with respect to relapsing subjects (a), despite comparable heart rate variability parameters at rest (b). Incomplete recovery from relapse was associated with lower LFnu increase after HUTT (c). LF/HF: low frequency/high frequency ratio. *P < 0.05 with respect to healthy controls; #P < 0.05 with respect to active not relapsing MS.