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Evidence for central phenomena participating in the changes of responses of ventrobasal thalamic neurons in arthritic
G Guilbaud1, J M Benoist, A Eschalier
1Unité de Recherche en Physiopharmacologie du Système nerveux U 161 INSERM, Paris, France.
Brain Research
|April 10, 1989
Abstract:
In this study performed in the Freund's adjuvant-induced arthritic rat, a local injection of lidocaine in one hind paw strongly depressed the ventrobasal thalamic neuronal responses to mild stimulation of both ankles. In parallel, a behavioral study provided evidence for a bilateral hypoalgesia, tested by the vocalization threshold to paw pressure, after a unilateral anesthetic block. The involvement of central phenomena in the changes of neuronal responsivity described in this model of experimental pain is therefore suggested.