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Spatiotemporal mapping of rhythmic activity in the inferior convexity of the macaque prefrontal cortex

2011

Poster

ei


The inferior convexity of the macaque prefrontal cortex (icPFC) is known to be involved in higher order processing of sensory information mediating stimulus selection, attention and working memory. Until now, the vast majority of electrophysiological investigations of the icPFC employed single electrode recordings. As a result, relatively little is known about the spatiotemporal structure of neuronal activity in this cortical area. Here we study in detail the spatiotemporal properties of local field potentials (LFP's) in the icPFC using multi electrode recordings during anesthesia. We computed the LFP-LFP coherence as a function of frequency for thousands of pairs of simultaneously recorded sites anterior to the arcuate and inferior to the principal sulcus. We observed two distinct peaks of coherent oscillatory activity between approximately 4-10 and 15-25 Hz. We then quantified the instantaneous phase of these frequency bands using the Hilbert transform and found robust phase gradients across recording sites. The dependency of the phase on the spatial location reflects the existence of traveling waves of electrical activity in the icPFC. The dominant axis of these traveling waves roughly followed the ventral-dorsal plane. Preliminary results show that repeated visual stimulation with a 10s movie had no dramatic effect on the spatial structure of the traveling waves. Traveling waves of electrical activity in the icPFC could reflect highly organized cortical processing in this area of prefrontal cortex.

Author(s): Panagiotaropoulos, T. and Besserve, M. and Crocker, B. and Kapoor, V. and Tolias, AS. and Panzeri, S. and Logothetis, NK.
Volume: 41
Number (issue): 239.15
Year: 2011
Month: November
Day: 0

Department(s): Empirical Inference
Bibtex Type: Poster (poster)

Digital: 0
Event Name: 41st Annual Meeting of the Society for Neuroscience (Neuroscience 2011)
Event Place: Washington, DC, USA

Links: Web

BibTex

@poster{PanagiotaropoulosBCKTPL2011,
  title = {Spatiotemporal mapping of rhythmic activity in the inferior convexity of the macaque prefrontal cortex},
  author = {Panagiotaropoulos, T. and Besserve, M. and Crocker, B. and Kapoor, V. and Tolias, AS. and Panzeri, S. and Logothetis, NK.},
  volume = {41},
  number = {239.15},
  month = nov,
  year = {2011},
  month_numeric = {11}
}