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. 2019 Mar 14;11:4. doi: 10.3389/fnsyn.2019.00004

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Copyright © 2019 Park, Kang, Sanderson, Bortolotto, Georgiou, Zhuo, Kaang and Collingridge.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Heterosynaptic facilitation of LTP by delivery of sTBS to an independent input. (A) Input-specific LTP induced by a weak TBS (wTBS; 3 bursts of 15 stimuli) from 10 experiments (filled circles); non-tetanized independent input (open circles). (B) Similar LTP in the weak input when preceded by a cTBS delivered to an independent input, 30 min previously (n = 7). (C) Facilitation of LTP induced by the wTBS when preceded by a sTBS delivered to an independent input, 30 min previously (n = 16). (D,E) Superimposition of the LTP induced by the wTBS (data from A,B and A,C) to highlight the lack of effect of prior cTBS (D) in contrast to the heterosynaptic facilitation of LTP by prior sTBS (E). (F) Additional quantification of the data in (A–C). ^∗p < 0.05; ^∗∗p < 0.01; comparisons vs. sTBS.