Waikato Hospital as seen over lake Rotoroa

M. Darracq, J. Sleigh , M.I. Banks, R.D. Sanders

British Journal of Anaesthesia
Published online: October 15, 2018

DOI: https://doi.org/10.1016/j.bja.2018.09.006

We showed recently that propofol induces changes in the evoked EEG power spectral response after transcranial magnetic stimulation (TMS) of the occipital cortex.1 As an extension of these analyses, we further analysed these data to investigate whether propofol reduced Lempil–Ziv complexity (LZC), or increased stability, of the evoked EEG power spectrum after TMS. The evoked power spectrum was calculated using time–frequency decomposition using a seventh-order Morlet wavelet transform to provide good time resolution.