electro-olfactography

{{Hatnote|Not to be confused with electrooculography, which "EOG" usually refers to.}}

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Electro-olfactography or electroolfactography (EOG) is a type of electrography (electrophysiologic test) that aids the study of olfaction (the sense of smell). It measures and records the changing electrical potentials of the olfactory epithelium,{{Citation |editor-last=Glatz |editor-first=Richard |year=2015 |title=Molecular Basis of Olfaction. Volume 130 of Progress in Molecular Biology and Translational Science |publisher=Academic Press|page=ix |url=https://books.google.com/books?id=LFOZBQAAQBAJ&pg=PR9 |isbn=978-0128029138 |postscript=.}} in a way similar to how other forms of electrography (such as ECG, EEG, and EMG) measure and record other bioelectric activity.

Electro-olfactography has been used for decades to advance the basic science of smell,{{Cite journal |last1=Scott |first1=JW |last2=Scott-Johnson |first2=PE |year=2002 |title=The electroolfactogram: a review of its history and uses |journal=Microsc Res Tech |volume=58 |issue=3 |pages=152–160 |pmid=12203693 |doi=10.1002/jemt.10133|s2cid=28023025 |doi-access=free }}{{Cite journal |last1=Myers |first1=LJ |last2=Nash |first2=R |last3=Elledge |first3=HS |title=Electro-olfactography: a technique with potential for diagnosis of anosmia in the dog |journal=Am J Vet Res |year=1984 |volume=45 |issue=11 |pages=2296–2298 |pmid=6524723 }} although the advances in molecular biology in recent decades have expanded olfactory science beyond the knowledge that the electrical recordings of electro-olfactography alone could provide. Electro-olfactography is closely related to electroantennography, the electrography of insect antennae olfaction.

Neuroscientist David Ottoson (1918-2001) discovered the electro-olfactogram (EOG) and analysed its properties in great detail.{{Citation |last=Døving |first=Kjell |year=2003 |title=David Ottoson (1918–2001) |journal=Chemical Senses |volume=28 |issue=2 |pages=83–84 |doi=10.1093/chemse/28.2.83 |postscript=.|doi-access=free }}