Modulating the Phase Coherence of Neuronal Population Oscillations in the Gamma Band
Control of the phase coherence between oscillatory neuronal populations has been proposed as a key mechanism to gate neuronal communication. Here we investigate the emergence of phase coherence, at the level of both LFP and MUA, between two neuronal areas that exhibit population oscillations in the gamma band. To that end we simulate two large interacting recurrent networks of Hodgkin-Huxley neurons. We observe that changes in the strength and topology of inter-areal synaptic projections can effectively modulate the phase coherence at gamma frequencies.
We thank Pascal Fries for useful discussions. Funding provided by the Ministerio de Ciencia e Innovacin (Spain, project FIS2009-13360) and the ICREA Academia programme.
- 1.Buzsáki, G., Draguhn, A. Neuronal oscillations in cortical networks. Science 304 (2004) 1926–1929.Google Scholar
- 2.Brunel, N., Wang, X.-J.: What determines the frequency of fast network oscillations with irregular neural discharges? I. Synaptic dynamics and excitation-inhibition balance. J Neurophysiol 90 (2003) 415–430.Google Scholar
- 5.van Elswijk, G., Maij, F., Schoffelen, J.-M., Overeem, S., Stegeman, D. F., Fries, P. Corticospinal beta-band synchronization entails rhythmic gain modulation. J Neurosci 30 (2010) 4481–4488.Google Scholar