A radiographic technique (now largely superseded) for examining the brain. It involved displacing the cerebrospinal fluid in the ventricles of the brain by air or oxygen, which served as a contrast medium.
- ‘Pneumoencephalography was performed extensively throughout the late 20th century, but it was extremely painful and, as researchers would later discover, very dangerous’
- ‘Pneumoencephalography has proved so useful in the investigation of disease of central nervous system that it is now widely practised.’
We take a look at several popular, though confusing, punctuation marks.