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Sökning: WFRF:(Bugiardini Enrico) > (2007-2009) > (2008)

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1.
  • Donadio, Vincenzo, et al. (författare)
  • Anhidrosis in multiple system atrophy: a preganglionic sudomotor dysfunction?
  • 2008
  • Ingår i: Movement disorders : official journal of the Movement Disorder Society. - 1531-8257. ; 23:6, s. 885-8
  • Tidskriftsartikel (refereegranskat)abstract
    • Anhidrosis occurs in the majority of multiple system atrophy (MSA) patients but the underlying site of lesion is not well established. We describe three patients with long-standing MSA and anhidrosis diagnosed on the basis of a thermoregulatory sweating test. In biopsies of anhidrotic skin, immunofluorescence analysis disclosed a well preserved postganglionic sudomotor innervation in all three patients supporting the hypothesis of a preganglionic nerve fiber lesion underlying their anhidrosis. Postganglionic sudomotor fiber integrity was also confirmed by normal electrodermal responses in one patient, whereas such responses and microneurographically detectable skin sympathetic nerve activity were absent in the other two MSA patients, suggesting a functional inactivity of structurally intact postganglionic sympathetic skin fibers.
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2.
  • Donadio, Vincenzo, et al. (författare)
  • Sympathetic and cardiovascular activity during cataplexy in narcolepsy.
  • 2008
  • Ingår i: Journal of sleep research. - 1365-2869. ; 17:4, s. 458-63
  • Tidskriftsartikel (refereegranskat)abstract
    • Autonomic nervous system activity changes have been described during cataplexy as playing a role in triggering it. To confirm these previous findings, we investigated the time course of sympathetic and cardiovascular activities during cataplexy. We made for the first time microneurographic recordings of 10 cataplectic episodes in three patients with hypocretin-deficient narcolepsy. During microneurography, muscle sympathetic nerve activity (MSNA) was recorded simultaneously with heart rate (HR), respiratory movements, arterial finger blood pressure (BP), electroencephalography, electro-oculogram and superficial electromyogram. Results showed no significant autonomic changes before the onset of the cataplectic episodes. Cataplexy was associated with a significant increase in MSNA and BP compared with baseline, whereas HR was markedly decreased. An irregular breathing pattern mainly characterized by apnea typically occurred during the attacks. In conclusion, our findings did not show significant changes in autonomic activity prior to cataplexy onset, ruling out a triggering role of the autonomic system. However, cataplexy was associated with co-activation of sympathetic and parasympathetic autonomic systems, a pattern reminiscent of that reported during the vigilance reaction in animals.
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