First published <a href="https://en.wikipedia.org/wiki/Electroencephalogram" class="extiw" title="w:Electroencephalogram">Electroencephalogram</a> of a human.
<p>This image is one of the first EEGs, appearing in Berger's First Report.  It is a portion of fig. 13 from Berger's first publication on EEG:
</p>
<ul><li>Berger H. Über das Elektrenkephalogramm des Menschen. <i>Archives für Psychiatrie</i>. 1929; 87:527-70.</li></ul><p>This was later translated into English and republished:
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<ul><li>Berger H. On the Electroencephalogram of Man. <i>Electroencephalogr Clin Neurophysiol</i>. 1969;Suppl 28:37-73. <a rel="nofollow" class="external text" href="https://www.ncbi.nlm.nih.gov/pubmed/4188918?dopt=Abstract">PMID 4188918</a></li></ul>
It appears on page 58 of the translated version. The top trace is the <a href="https://en.wikipedia.org/wiki/electroencephalography" class="extiw" title="wikipedia:electroencephalography">EEG</a> recorded from a young boy, the bottom trace is a 10 Hz frequency reference.
Hans Berger
December 1937 ?
Berger H. Über das Elektrenkephalogramm des Menchen. <i>Archives für Psychiatrie</i>. 1929; 87:527-70.