Characterization of trial-to-trial fluctuations in local field potentials recorded in cerebral cortex of awake behaving macaque

Menzer, D. L., Bokil, H., Ryou, J. W., Schiff, N. D., Purpura, K. P., Mitra, P. P. (2010) Characterization of trial-to-trial fluctuations in local field potentials recorded in cerebral cortex of awake behaving macaque. Journal of Neuroscience Methods, 186 (2). pp. 250-261.

URL: https://www.ncbi.nlm.nih.gov/pubmed/19931563
DOI: 10.1016/j.jneumeth.2009.11.012

Abstract

In analyzing neurophysiologic data, individual experimental trials are usually assumed to be statistically independent. However, many studies employing functional imaging and electrophysiology have shown that brain activity during behavioral tasks includes temporally correlated trial-to-trial fluctuations. This could lead to spurious results in statistical significance tests used to compare data from different interleaved behavioral conditions presented throughout an experiment. We characterize trial-to-trial fluctuations in local field potentials recorded from the frontal cortex of a macaque monkey performing an oculomotor delayed response task. Our analysis identifies slow fluctuations (<0.1 Hz) of spectral power in 22/27 recording sessions. These trial-to-trial fluctuations are non-Gaussian, and call into question the statistical utility of standard trial shuffling. We compare our results with evidence for slow fluctuations in human functional imaging studies and other electrophysiologic studies in nonhuman primates.

Item Type: Paper
Uncontrolled Keywords: Local field potential Macaque Nonstationarity Oculomotor Spectral analysis Trial-to-trial
Subjects: organs, tissues, organelles, cell types and functions > cell types and functions > cell types > neurons
organs, tissues, organelles, cell types and functions > cell types and functions > cell types > neurons
organs, tissues, organelles, cell types and functions > cell types and functions > cell types > neurons

organism description > animal > mammal > primates
CSHL Authors:
Communities: CSHL labs > Mitra lab
Depositing User: CSHL Librarian
Date Deposited: 03 Oct 2011 15:42
Last Modified: 03 Feb 2017 16:03
PMCID: PMC2815007
Related URLs:
URI: http://repository.cshl.edu/id/eprint/15481

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