An imaging test (such as a CT scan or an MRI) may be used to check for signs of a stroke or brain tumor. Another type of imaging test, called PET, sometimes may detect low levels of dopamine in the brain, a key feature of Parkinson's.
\r\nJohnny Delusional here\t\t\t\t\t\t\t\t\t\t. \n\t\t\t\t\t\t\t\t\t\t\tWords are in my head but I can't enunciate them clearly. \r\nHeadphones on your hair, they prevent a chance to even try. \r\nSome might find me borderline attractive from afar. \r\nBut afar is not where I can stay and there you are.
The OED claims the first usage of the phrase, spelled worrywart, appeared on page 177 of Ivan Belknap's 1956 book Human Problems of State Mental Hospitals: The persevering, nagging delusional group who were termed 'worry warts', 'nuisances', 'bird dogs', in the attendants' slang..