The extent of paired-pulse ratios across different studies should be interpreted with caution due to the high dependence on repetition rate, while the results at the commonly used stimulus intensities are comparable. For an optimized parameter setting with sufficient paired-pulse suppression, we ...
PPF ratios are thought to reflect the functional state of presynaptic release mechanisms, whereby high PPF ratios are indicative of a low release probability and low PPF ratios represent a high release probability (Zucker, 1989). The degree or direction of synaptic change induced by a particular ...
We found a negative correlation between PT and PPS (r = −0.36, P = 0.039) indicating that higher PT were associated with smaller ratios indicative of low excitability, and vice versa. There was no difference in PPS between subjects who perceived phosphenes and those who did not. Conclusion...
Presynaptic release probability, estimated from paired-pulse facilitation ratios, was modified neither in resistant nor epileptic rats.Luz M. SuárezElena CidBeatriz GalMarion InostrozaJorge R. BrotonsMasDaniel GómezDomínguezLiset Menéndez de la Prida...
Normal input-output curves and paired pulse ratios (PPRs) in Dyt1 heterozygous KO mice.Fumiaki, YokoiHuanXin, ChenMai, Tu DangChad, C. CheethamSusan, L. CampbellSteven, N. RoperJ., David SweattYuqing, Li
Paired-pulse facilitation ratios were calculated for various periods (up to 2-3 h) following induction of long-term potentiation. The ratio persistently decreased in the majority of neurons following long-term potentiation induction. The decrease in the paired-pulse facilitation ratio correlated with ...
The lack of significant changes in some studies could be due to the inclusion in the analyses of experiments with long-term potentiation of small magnitude, in which changes in paired-pulse facilitation ratios would have been inconsistent. The present study suggests that the early (10–20 min...
In addition, the cortical amplitude ratio A2s/A1 was significantly reduced compared to the amplitude ratios over cranial medulla and brachial plexus. These results suggest that the underlying inhibitory mechanisms are generated rostral to the brainstem nuclei, probably due to the activity of thalamic ...