A 35-year-old male presents to the emergency department claiming that the government is broadcasting messages directly into his brain through his dental fillings. He is convinced this is true despite evidence to the contrary. This symptom is characteristic of which type of disorder?

Explanation

The patient's fixed, false belief that the government is broadcasting messages into his brain, despite evidence to the contrary, is a delusion (specifically, a delusion of control or influence). Delusions are a cardinal symptom of psychotic disorders, indicating a break from reality. Obsessive-compulsive disorder, generalized anxiety disorder, and somatic symptom disorder are typically considered neurotic disorders where reality testing remains intact, and delusions are not present.