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The responsiveness of trigeminal brain stem neurons to selective local mechanical and chemical stimulation of the cranial dura mater was examined in a preparation in the rat. The dura mater encephali was exposed and its surface stimulated with electrical pulses through bipolar electrodes. Extracellular recordings were made from neurons in the subnucleus(More)
This electrophysiological study examined whether octreotide, a stable analogue of somatostatin (SOM), reduces the mechanosensitivity of fine primary afferents from inflamed knee joints of rats similarly to SOM itself (Pain 73 (1997) 377). Close intra-arterial application of 200 microl of octreotide (10(-6)-10(-3) M) dose-dependently diminished the responses(More)
1. The dura mater encephali of the rat was exposed and the blood flow around branches of the medial meningeal artery was monitored with a laser Doppler flowmeter. Changes in the meningeal blood flow (MBF) following electrical stimulation of the dura mater at a parasagittal site were registered. The effects of human calcitonin gene-related peptide (h-alpha(More)
Whole-body vibration training (WBV) has been reported to improve both, bone strength and neuromuscular performance. Although changes in hormonal and immunological parameters following vibration exercises were reported, there are still few studies concerning the immune response with respect to different duration of WBV. In our study, we aimed to establish(More)
The antiepileptic drug gabapentin has been shown to have an antihyperalgesic effect following central administration. This electrophysiological investigation examined whether peripherally administered gabapentin could modulate the mechanosensitivity of primary afferents innervating normal and kaolin/carrageenan inflamed rat knee joints. Close intraarterial(More)
In total 23 rat knee joint afferent units with conduction velocities of 1.2-17 m/s were recorded extracellularly during inward and outward joint rotations of defined torque using a newly developed torque-meter. There was not a linear relation between the torque and the obtained angle of the joint. The mechanical thresholds of the units ranged from 10 to 60(More)
OBJECTIVE To compare 3 different hyaluronan (HA) preparations used as therapeutic agents for osteoarthritis pain in humans in order to establish the degree to which a single application affects the sensitivity of nociceptors in both the normal and the acutely inflamed rat joint. METHODS In anesthetized rats, single-unit recordings were performed from the(More)
INTRODUCTION Optimal parameters of whole-body vibration (WBV), effective in increasing bone mass or preventing bone loss, are always being sought. We investigated effects of a 6-mo WBV program, consisting of brief daily vibratory sessions, on the bone mass and bone metabolic markers. METHODS There were 10 male Wistar rats (3 mo old) that were subjected to(More)
The aim of the present study was to examine the effect of galanin on group III and IV afferent nerve fibres (n = 53) innervating normal and acutely inflamed knee joints in rats. They responded to local mechanical stimulation, movements of the joint and i.a. injections of KCl close to the joint. Single i.a. bolus injections of galanin (0.1 mM, 0.2 mL) caused(More)
Nociceptin is known to act peripherally in the rat knee joint to modulate articular mechanosensitivity and it has been postulated that neurokinin-1 (NK1) receptors may be involved in this process. To test this hypothesis, single unit extracellular recordings were made from knee joint primary afferents in response to normal and extreme rotation of the joint.(More)