{'fraction_non_alphanumeric': 0.01859229747675963, 'fraction_numerical': 0.0, 'mean_word_length': 4.984126984126984, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
[Comparative study of source leads, bipolar leads and neck reference leads (author's transl)].

A twelve-channel machine was wired up in such a way that the same signals were recorded simultaneously via source leads, longitudinal bipolar leads and reference leads to an electrode at the base of the neck. This comparative study demonstrated that source leads do not provide a more accurate indication of the location of diffuse or extensive cerebral activity. On the contrary, in some cases we noted a decrease in the amplitude of the activities recorded, the suppression of certain components which were none the less present and even the appearance of a recording in phase opposition where there was no inversion of phases in the electrodes concerned.