Cutaneous pain threshold changes after sympathetic block in reflex dystrophies
- 1 June 1975
- journal article
- Published by Ovid Technologies (Wolters Kluwer Health) in Pain
- Vol. 1 (2), 167-175
- https://doi.org/10.1016/0304-3959(75)90100-1
Abstract
In a group of 30 subjects suffering from sympathetic reflex dystrophies of the limbs, the sympathetic ganglia of the affected side were blocked with a local anesthetic. Using an original method, we measured the cutaneous pain threshold before the block and at prefixed intervals after the block during a period of 2 days. In all subjects the cutaneous pain threshold showed damped oscillations both in the limb ipsilateral to the block and in the contralateral one. The analysis of these oscillations showed: (a) that the sympathetic control of the cutaneous pain threshold may be exerted through a negative feedback loop (skin-afferent input-CNS-sympathetic output-skin); (b) that the afferent discharge of a limb controls the contralateral sympathetic output through central mechanisms.Keywords
This publication has 4 references indexed in Scilit:
- The integration of autonomic system reactionsPublished by Springer Science and Business Media LLC ,2005
- Mechanisms of circulatory changes accompanying hypnotic imagination of hyperalgesia and hypoalgesia in causalgic limbsZeitschrift für Die Gesamte Experimentelle Medizin, 1968
- Sympathetic Reflex DystrophyMedical Clinics of North America, 1965
- CAUSALGIC STATES IN PEACE AND WARJournal of the American Medical Association, 1945