Brain Extract causes the brain of a dead or living human to pop out of his head to be collected. This is a second method of collecting a brain stem, aside from the Anal Probe. They're also used to fuel the meter for the Mind Flash ability.
During the original use of the Brain Extract would drain your Concentration along with stronger enemies taking longer to Extract a brain from. The remake allows for this allows this ability to extract multiple enemies at once as well as chaining.
- In Path of the Furon, the Brain Extract ability is removed. Instead Transmogrifying a human will do the same