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. Author manuscript; available in PMC: 2011 Jun 1.
Published in final edited form as: Neuropsychologia. 2009 Dec 5;48(7):1886–1894. doi: 10.1016/j.neuropsychologia.2009.11.026

Fig. 3. Spectral analysis.

Fig. 3

Fraction of remaining power after removal of the cardiac (a) and respiratory artifacts (b). Different colors correspond to the three different animals. Data are averaged over all runs and voxels with significant cardiac (a) and respiratory artifacts (b). Note that most of the artifacts are in the waveband below 10 s. However, some of the respiratory artifacts are in the waveband between 20 and 300 s. The differences between the animals are due to different cardiac and respiratory frequencies which cause an aliasing of the artifacts into different wavebands