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Functional disability has been identified as one of the most important aspects of chronic pain, yet modeling pain-related disability has received little attention. Adjuvant-induced arthritis was induced, and one group of arthritic rats was implanted with SC 75-mg morphine pellets 1 week postadjuvant, and reimplanted every 2 weeks thereafter. The results(More)
Chronic pain is disabling, and the adverse effects of morphine are also disabling. The best way to assess the beneficial effects relative to the potential adverse effects of chronic morphine may be through the use of quantitative measures of functional disability in people and animals experiencing pain. If chronic morphine alleviates chronic pain and its(More)
An extensive behavioral characterization was conducted with mice lacking the gene for neuropeptide Y (NPY) including response to 24 and 48 h fast and challenge with small molecule antagonists of NPY receptors implicated in mediating the feeding effects of NPY (i.e., Y1 and Y5). In addition, wildtype (WT) and NPY knockout (KO) mice were tested in locomotor(More)
Cognitive deficits are the most enduring and disabling sequelae of human traumatic brain injury (TBI), but quantifying the magnitude, duration, and pattern of cognitive deficits produced by different types of TBI has received little emphasis in preclinical animal models. The objective of the present study was to use a battery of behavioral tests to(More)
It is widely accepted that enduring parkinsonian symptoms are only evident if there are few remaining dopaminergic neurons in the substantia nigra and dopamine levels in the basal ganglia are very low [26,41]. In the present study, partial dopamine depletions were produced by infusing 6-OHDA bilaterally into the ventrolateral striatum as previously(More)
The present study examined the effects of encapsulated cells which were genetically modified to secrete human glail-derived neurotrophic factor (hGDNF) on the motor deficits in aged rodents. Prior to implantation, animals were tested on a battery of motor tasks. Spontaneous locomotion and motor coordination was evaluated in young (5 month) and aged (20(More)
Behavioral measures of parkinsonism that are more clinically relevant than rotometry have been developed for rats with severe unilateral dopamine depletions, and the validity of these measures is supported by reports that these parkinsonian symptoms are attenuated by drugs that are effective in the clinical setting. Although the therapeutic gold standard,(More)
Many articles have reported that adrenal chromaffin cell transplants produce analgesic effects. Surprisingly, studies conducted in our laboratory failed to detect analgesic effects of adrenal chromaffin cell transplants. Although we have attempted to replicate the procedures reported to produce analgesic effects with adrenal chromaffin transplants, many of(More)
Adrenal chromaffin cells reportedly produce analgesic effects when implanted in the periaqueductal gray and the intrathecal space near the spinal cord. Chromaffin cells implanted in the cerebral ventricles may also produce analgesic effects, and the availability of the cerebral ventricles as a potential implant site could be advantageous for some patients.(More)
Numerous publications have reported that adrenal chromaffin cells implanted in the lumbar intrathecal space produce analgesic effects in rodent models of pain. The present study was intended to replicate and extend on the results of those previous publications. This study was conducted to determine: (1) if analgesic effects of polymer-encapsulated(More)