Abstract：
:This paper describes a new protocol that addresses the question of whether, in human experiments, modulatory effects of remote nociceptive conditioning stimuli on reflex responses are mediated by the stress induced by the conditioning stimuli. The protocol has been illustrated by a study into the effect of a remote nociceptive conditioning stimulus on an inhibitory jaw reflex. Electromyograms were recorded from an active masseter muscle and inhibitory reflexes were evoked by applying electrical stimuli to the upper lip. This protocol utilised the application of discrete electrical conditioning stimuli applied to the sural nerve prior to the test stimulus. A preliminary experiment determined that the optimal interval between the conditioning and test stimuli, which produced modulatory effects was 100 ms. In the definitive study, computer software was used to deliver control and conditioned sweeps in a double-blind randomised sequence. This resulted in a "stress-equal" protocol in which the level of stress would be the same for both control and conditioned sweeps. Therefore any observed modulatory effects on the reflexes could not have been wholly secondary to stress. This protocol could be adapted to the study of the modulation of other reflexes or evoked sensations by nociceptive conditioning stimuli.
journal_name
J Neurosci Methodsjournal_title
Journal of neuroscience methodsauthors
Mason AG,van der Glas HW,Jones RM,Cadden SWdoi
10.1016/j.jneumeth.2005.01.002subject
Has Abstractpub_date
2005-06-30 00:00:00pages
245-53issue
1-2eissn
0165-0270issn
1872-678Xpii
S0165-0270(05)00012-9journal_volume
145pub_type
杂志文章abstract：:This study examined the effect of two dissection techniques on the quality of human brain specimens. Frozen cerebellar samples were obtained from postmortem brains of 10 subjects free from neurological and psychiatric disease. These tissues were tested for RNA and DNA concentration and quality after being dissected wi...
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journal_title：Journal of neuroscience methods
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journal_title：Journal of neuroscience methods
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journal_title：Journal of neuroscience methods
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