The new Extended International 10-20 System of the IFCN

The standard International 10–20 System (19 electrodes) does not include electrodes in the inferior chain (at the level of the preauricular point). Thus the

inferior-basal and anterior part of the temporal lobe, which preferentially picks up activity originating or propagating from the mesial temporal structures, is not sampled. Given that several frequent diseases (e.g., temporal lobe epilepsy due to hippocampal sclerosis, autoimmune epilepsy, Alzheimer’s disease) are characterized mainly by mesial temporal pathology, this region needs to be targeted through additional scalp electrodes in standard recordings.

The IFCN has endorsed a new Guideline (Seeck et al. 2017, The standardized EEG electrode array of the IFCN. Clin Neurophysiol 128:2070-2077, that addresses this problem. The standard International 10-20 System is extended by addition of the T9/T10 (10% inferior to T7/T8), F9/F10 (20% anterior to T9/10, or 10% inferior to F7/F8) and P9/P10 (10% inferior to P7/P8 or 20% posterior to T9/T10) electrodes, which results in a total of 25 electrodes (Figure).

The IFCN strongly recommends to use these 25 electrodes as a minimum for all standard EEG recordings.

Figure. The new Extended International 10-20 System of the IFCN.


Clinical Neurophysiology Practice is now listed on PubMed

Application  for our new open-access journal, Clinical Neurophysiology Practice for listing by PubMed Central was successful.
Now that we will be listed on PubMed Central, future papers will be indexed and available for the foreseeable future. However in addition those papers published prior to acceptance will be indexed back to issue 1, page 1.This is expected to occur in August or September, once a few administrative and technical issues about uploading to PMC have been addressed.

Potential authors are encouraged to think of this journal for submissions that are practice-orientated - technique updates, repetition and validation studies, normative data, illustrative case reports, see published articles for all issues back to 2016 <>, details of the journal <>, and our guide for authors