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I block reveals separation of timescales in pyloric rhythm response to temperature changes in . | LitMetric

AI Article Synopsis

Article Abstract

Motor systems operate over a range of frequencies and relative timing (phase). We studied the role of the hyperpolarization-activated inward current (I) in regulating these features in the pyloric rhythm of the stomatogastric ganglion (STG) of the crab, as temperature was altered from 11°C to 21°C. Under control conditions, rhythm frequency increased monotonically with temperature, while the phases of the pyloric dilator (PD), lateral pyloric (LP), and pyloric (PY) neurons remained constant. Blocking I with cesium (Cs) phase advanced PD offset, LP onset, and LP offset at 11°C, and the latter two further advanced as temperature increased. In Cs the frequency increase with temperature diminished and the Q of the frequency dropped from ~1.75 to ~1.35. Unexpectedly in Cs, the frequency dynamics became non-monotonic during temperature transitions; frequency initially dropped as temperature increased, then rose once temperature stabilized, creating a characteristic 'jag'. Interestingly, these jags persisted during temperature transitions in Cs when the pacemaker was isolated by picrotoxin, although the temperature-induced change in frequency recovered to control levels. Overall, these data suggest that I plays an important role in maintaining smooth transitory responses and persistent frequency increases by different mechanisms in the pyloric circuitry during temperature fluctuations.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11479588PMC
http://dx.doi.org/10.7554/eLife.98844DOI Listing

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