Pre- and postganglionic vasomotor dysfunction causes distal limb coldness in multiple system atrophy
| Autor: | Kishin Koh, Takanori Hata, Mai Tsuchiya, Fumikazu Kobayashi, Yuta Ichinose, Yoshihisa Takiyama, Kazumasa Shindo, Takamura Nagasaka, Nobuo Yamashiro |
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| Rok vydání: | 2017 |
| Předmět: |
0301 basic medicine
Male medicine.medical_specialty Autonomic Fibers Preganglionic Stimulation Multiple system atrophy (MSA) 03 medical and health sciences 0302 clinical medicine Atrophy Sympathetic Fibers Postganglionic Internal medicine Reflex Laser-Doppler Flowmetry Medicine Humans Vascular Diseases Aged Skin integumentary system Vasomotor business.industry Anatomy Laser Doppler velocimetry Middle Aged Multiple System Atrophy medicine.disease Electric Stimulation Peripheral 030104 developmental biology Neurology Vasoconstriction Cardiology Autonomic Fibers Postganglionic Female Neurology (clinical) medicine.symptom business 030217 neurology & neurosurgery Blood Flow Velocity |
| Zdroj: | Journal of the neurological sciences. 380 |
| ISSN: | 1878-5883 |
| Popis: | The detailed pathophysiology of limb coldness in multiple system atrophy (MSA) is unknown.We evaluated cutaneous vasomotor neural function in 18 MSA patients with or without limb coldness, and in 20 healthy volunteers as controls. We measured resting skin sympathetic nerve activity (SSNA) and spontaneous changes of the sympathetic skin response (SSR) and skin blood flow (skin vasomotor reflex: SVR), as well as SVR and reflex changes of SSNA after electrical stimulation. The parameters investigated were the SSNA frequency at rest, amplitude of SSNA reflex bursts, absolute decrease and percent reduction of SVR, recovery time, and skin blood flow velocity.Both the resting frequency of SSNA and the amplitude of SSNA reflex bursts were significantly lower in the MSA group than the control group (p0.001 and p0.05, respectively). There were no significant differences between the two groups with regard to the absolute decrease or percent reduction of SVR volume. The recovery time showed no significant difference between all MSA patients and control groups, but it was significantly prolonged in six MSA patients with limb coldness compared with that in the control group and that in MSA patients without limb coldness (p0.01). The skin blood flow velocity was significantly slower in the MSA group than in the control group (p0.001).In MSA patients, limb coldness might occur due to impairments of the peripheral circulation based on prolongation of vasoconstriction and a decrease of skin blood flow velocity secondary to combined pre- and postganglionic skin vasomotor dysfunction. |
| Databáze: | OpenAIRE |
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