Abstract：
:The mechanisms responsible for the rate of rise (RR) of cumulative depolarization induced by dorsal root stimulus trains were investigated with intracellular recordings from motoneurones of the rat isolated spinal cord. The NMDA receptor antagonists CPP or APV depressed the cumulative depolarization but not its RR which could still be fast enough to elicit action potential wind-up. RR size was correlated with a slow synaptic potential (detected in CPP or APV solution) with which it shared similar voltage dependence. The NK1 antagonist SR 140333 depressed cumulative depolarization, RR and slow synaptic potentials. It appears that the RR (and the ability to express wind-up) was determined by summation of slow synaptic potentials partly mediated via activation of NK1 receptors.
journal_name
Brain Resjournal_title
Brain researchauthors
Baranauskas G,Nistri Adoi
10.1016/s0006-8993(96)00997-3subject
Has Abstractpub_date
1996-11-04 00:00:00pages
329-32issue
2eissn
0006-8993issn
1872-6240pii
S0006-8993(96)00997-3journal_volume
738pub_type
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