The application of in vivo multi-channel recording methods in the studies of the affective pain in rats / 中国应用生理学杂志

ABSTRACT

<p><b>OBJECTIVE</b>To record the electrical activities of Antirior cingulate cortex (ACC) neurons by in vivo multi-channel recording methods using the model of complete freund's adjuvant (CFA) induced conditioned place avoidance (C-CPA), which has been set up in our previous studies.</p><p><b>METHODS</b>The electrode was self-made and the CPA responses were recorded by in vivo multi-channel recording method.</p><p><b>RESULTS</b>(1) The electrical activities of ACC neurons could be successfully recorded by the self-made electrode. (2) Before or after the injection of CFA, rats were respectively conditioned to the different place. The firing rates of ACC neurons in the CFA-paired place vs that in the non-CFA-paired place was (0.853 ± 1.377) imp/s vs (0.221 ± 0.971) imp/s (P < 0.05, n = 26). (3) The CPA responses in the CFA-paired place vs that in the non-CFA-paired place were (303.55 ± 61.77)s vs (140.32 ± 33.52)s(P < 0.05, n = 6).</p><p><b>CONCLUSION</b>The firing rates of rACC (rostral Anterior Cingulate Cortex) neurons were involved in the occurrence of the affective pain.</p>