The dynamics underlying pseudo-plateau bursting in a pituitary cell model.
Journal of Mathematical Neuroscience
Pituitary cells of the anterior pituitary gland secrete hormones in response to patterns of electrical activity. Several types of pituitary cells produce short bursts of electrical activity which are more effective than single spikes in evoking hormone release. These bursts, called pseudo-plateau bursts, are unlike bursts studied mathematically in neurons (plateau bursting) and the standard fast-slow analysis used for plateau bursting is of limited use. Using an alternative fast-slow analysis, with one fast and two slow variables, we show that pseudo-plateau bursting is a canard-induced mixed mode oscillation. Using this technique, it is possible to determine the region of parameter space where bursting occurs as well as salient properties of the burst such as the number of spikes in the burst. The information gained from this one-fast/two-slow decomposition complements the information obtained from a two-fast/one-slow decomposition.
This work was supported by NSF grant DMS 0917664 to RB and NIH grant DK 043200 to RB and JT.
This is the final version of the article. Available from BioMed Central via the DOI in this record.
Journal of Mathematical Neuroscience, 2011, Vol. 1:12
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