Abstract:
:Waves are common in cortical networks and may be important for carrying information about a stimulus from one local circuit to another. In a recent study of visually evoked waves in rat cortex, compression and reflection of waves are observed as the activation passes from visual areas V1 to V2. The authors of this study apply bicuculline (BMI) and demonstrate that the reflection disappears. They conclude that inhibition plays a major role in compression and reflection. We present several models for propagating waves in heterogeneous media and show that the velocity and thus compression depends weakly on inhibition. We propose that the main site of action of BMI with respect to wave propagation is on the threshold for firing which we suggest is related to action on potassium channels. We combine numerical and analytic methods to explore both compression and reflection in an excitable system with synaptic coupling.
journal_name
Biol Cybernjournal_title
Biological cyberneticsauthors
Goulet J,Ermentrout GBdoi
10.1007/s00422-011-0465-3subject
Has Abstractpub_date
2011-10-01 00:00:00pages
253-68issue
3-4eissn
0340-1200issn
1432-0770journal_volume
105pub_type
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