We study the synchronization between left and right hemisphere rat electroencephalographic (EEG) channels by using various synchronization measures; namely nonlinear interdependences; phase synchronizations; mutual information; cross correlation; and the coherence function. In passing we show a close relation between two recently proposed phase synchronization measures and we extend the definition of one of them. In three typical examples we observe that except mutual information; all these measures give a useful quantification that is hard to be guessed beforehand from the raw data. Despite their differences; results are qualitatively the same. Therefore; we claim that the applied measures are valuable for the study of synchronization in real data. Moreover; in the particular case of EEG signals their use as complementary variables could be of clinical relevance.