People who are suicidal seem to have unusual patterns of activity in two parts of the brain that can be detected in a scanner
Source:
https://www.newscientist.com/article/2225292-two-brain-networks-behave-differently-in-people-who-are-suicidal/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home