Perseveration
Encyclopedia
Perseveration is the repetition of a particular response, such as a word, phrase, or gesture, despite the absence or cessation of a stimulus, usually caused by brain injury or other organic disorder. If an issue has been fully explored and discussed to a point of resolution, it is not uncommon for something to trigger the reinvestigation of the matter. This can happen at any time during a conversation. This is particularly true with those who have had Traumatic brain injury.

Several researchers have tried to connect perseveration with a lack of inhibition
Memory inhibition
In psychology, memory inhibition is the ability not to remember irrelevant information. Memory inhibition is a critical component of an effective memory system. For example, imagine if, when a person tried to remember where he had parked his car, every place he had ever parked his car came to mind;...

; however, this connection could not be found, or was small.

Perseveration may also refer to the obsessive and highly selective interests of individuals on the Autism spectrum. This term is most connected to Asperger syndrome.
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