Short answers, pulled from the story.
James Tilly Matthews created the Air Loom, a machine he believed was used by political enemies to torture his mind using invisible air currents. He drew detailed diagrams of the device while sitting in a London asylum in 1796. The Air Loom was not a physical object but a psychological fortress built to explain a world that had turned against him.
Karl Jaspers published General Psychopathology in 1913 and proposed four criteria for delusions: certainty, incorrigibility, impossibility, and un-understandability. These criteria were meant to provide a clear boundary between normal belief and pathological delusion. The first criterion refers to absolute conviction regardless of evidence, while the second means the belief cannot be changed by counterarguments.
A 2002 study revealed that higher levels of dopamine were linked to the formation and maintenance of certain delusions. The study examined individuals with delusions of jealousy and persecution and found they had different levels of dopamine metabolite HVA compared to healthy controls. This discovery supported the theory that schizophrenia and other psychotic disorders were linked to dopamine abnormalities.
Cultural factors play a decisive role in shaping the content and expression of delusions, as evidenced by differences between patients in Austria and Pakistan. In Austria, delusions of guilt and punishment are more common, while in Pakistan, delusions are more often about persecution. This cultural variation challenges the idea that delusions are purely biological phenomena.
The Martha Mitchell Effect occurs when a person's accurate claims are misdiagnosed as delusional because they seem unlikely or bizarre to those in power. Martha Mitchell made public allegations about illegal activity in the White House in the early 1970s, and her claims were dismissed as the ravings of a mentally ill woman. It was only after the Watergate scandal broke that her allegations were proven true.
Neuroimaging studies have revealed that dysfunction in the right lateral prefrontal cortex is associated with the formation of delusions. This region of the brain is responsible for conflict monitoring and the evaluation of beliefs, and abnormalities in this area have been linked to the development of delusions in various disorders. The right lateral prefrontal cortex is also associated with the ability to distinguish between relevant and irrelevant information.