Editing History of neuroimaging (section)

=== Air ventriculography ===
To combat this, in 1918, neurosurgeon Walter Dandy developed a technique called air ventriculography. This method injected filtered air directly into the lateral ventricles to better take pictures of the ventricle systems of the brain.<ref name=":02"/> Thanks to local anesthetics, this was not a painful procedure, but it was significantly risky. Hemorrhage, severe infection, and extreme changes in intrarenal pressure were all threats to the procedure. Despite this, Dandy did not stop there. In 1919, he proceeded to discover Encephalography, a medical procedure used to record the brain's electrical activity.<ref name=":12">{{Cite journal |last=Shorvon |first=Simon D. |date=March 2009 |title=A history of neuroimaging in epilepsy 1909–2009 |journal=Epilepsia |language=en |volume=50 |issue=s3 |pages=39–49 |doi=10.1111/j.1528-1167.2009.02038.x |issn=0013-9580|doi-access=free |pmid=19298431 }}</ref> This method involved attaching sensors to the brain that detect and measure the brain's electrical signals. These signals are then translated into a visual, showing the brain's activity patterns. With these early advances, neuroimaging was beginning to be used to diagnose conditions such as epilepsy, brain injuries, and sleep disorders. Providing invaluable information about brain function that would one day be added upon during the devolvement of modern neuroimaging.  {{cn|date=January 2024}}