Tonically driven and self-sustaining activity in the lamprey hemicord: when can they co-exist?
2007 (English)In: Neurocomputing, ISSN 0925-2312, Neurocomputing, ISSN 0925-2312, Vol. 70, no 10-12, 1882-1886 p.Article in journal (Refereed) Published
In lamprey hernisegmental preparations, two types of rhythmic activity are found: slower tonically driven activity which varies according to the external drive, and faster, more stereotypic activity that arises after a transient electrical stimulus. We present a simple conceptual model where a bistable excitable system can exhibit the two states. We then show that a neuronal network model can display the desired characteristics, given that synaptic dynamics-facilitation and saturation-are included. The model behaviour and its dependence on key parameters are illustrated. We discuss the relevance of our model to the lamprey locomotor system.
Place, publisher, year, edition, pages
2007. Vol. 70, no 10-12, 1882-1886 p.
Dynamical systems; Lamprey; Locomotion; Recurrent excitation
IdentifiersURN: urn:nbn:se:kth:diva-6306DOI: 10.1016/j.neucom.2006.10.055ISI: 000247215300055ScopusID: 2-s2.0-34247515220OAI: oai:DiVA.org:kth-6306DiVA: diva2:10985
QC 20100715. Uppdaterad från In press till Published 20100715.2006-11-012006-11-012012-03-21Bibliographically approved