Neurological Symptoms Glossary

noun a sensory perception that has no basis in external reality, typically as a result of a mental disorder or the effects of a drug

• The patient experienced a visual hallucination, seeing things that were not actually there.
• I thought I saw a ghost last night, but it turned out to be just a hallucination.
• Don't worry, it was just a hallucination, you're not going crazy.
• The mirage in the desert was like a hallucination, appearing and disappearing in the heat.

noun a facial expression showing a lack of interest or understanding

• She greeted me with a blank stare, giving away no hint of her emotions.
• When I asked him about the project, he just gave me a blank stare.
• I told her the joke but all I got in return was a blank stare.
• The painting of the landscape seemed to be staring back at me with a blank stare.