{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,16]],"date-time":"2026-09-16T06:32:26Z","timestamp":1789540346320,"version":"build-2803163510"},"reference-count":45,"publisher":"Wiley","issue":"2","license":[{"start":{"date-parts":[[2003,12,1]],"date-time":"2003-12-01T00:00:00Z","timestamp":1070236800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["The Journal of Physiology"],"published-print":{"date-parts":[[2003,12]]},"abstract":"<jats:p>Phase advancement of electrical slow waves and regulation of pacemaker frequency was investigated in the circular muscle layer of the gastric antra of wild\u2010type and <jats:italic>W\/W<jats:sup>V<\/jats:sup><\/jats:italic> mice. Slow waves in the murine antrum of wild\u2010type animals had an intrinsic frequency of 4.4 cycles min<jats:sup>\u22121<\/jats:sup> and were phase advanced and entrained to a maximum of 6.3 cycles min<jats:sup>\u22121<\/jats:sup> using 0.1 ms pulses of electrical field stimulation (EFS) (three pulses delivered at 3\u201330 Hz). Pacing of slow waves was blocked by tetrodotoxin (TTX) and atropine, suggesting phase advancement was mediated via intrinsic cholinergic nerves. Phase advancement and entrainment of slow waves via this mechanism was absent in <jats:italic>W\/W<jats:sup>V<\/jats:sup><\/jats:italic> mutants which lack intramuscular interstitial cells of Cajal (ICC\u2010IM). These data suggest that neural regulation of slow wave frequency and regulation of smooth muscle responses to slow waves are mediated via nerve\u2010ICC\u2010IM interactions. With longer stimulation parameters (1.0\u20132.0 ms), EFS phase advanced and entrained slow waves in wild\u2010type and <jats:italic>W\/W<jats:sup>V<\/jats:sup><\/jats:italic> animals. Pacing with 1\u20132 ms pulses was not inhibited by TTX or atropine. These data suggest that stimulation with longer pulse duration is capable of directly activating the pacemaker mechanism in ICC\u2010MY networks. In summary, intrinsic excitatory neurons can phase advance and increase the frequency of antral slow waves. This form of regulation is mediated via ICC\u2010IM. 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