
Thought blocking, a phenomenon that occurs in people with psychiatric illnesses (usually schizophrenia), occurs when a person`s speech is suddenly interrupted by silences that may last a few seconds to a minute or longer. Blocking is often brought on by questioning or discussing something of particularly large personal significance.{citation need....
Found on
http://en.wikipedia.org/wiki/Thought_blocking

sudden interruption in the train of thought, leaving a blank
Found on
http://www.encyclo.co.uk/local/22394

The unpleasant experience of having one's train of thought curtailed absolutely, often more a sign than a symptom.
Found on
http://www.priory.com/gloss.htm
No exact match found.