An objective phenomenon in which the patient abruptly breaks off his conversation and is silent for a few seconds and then resumes on a different topic. Subjectively they experience a complete cessation of all thought.

This is intended to provide open access to teaching materials which, whilst originally designed for medical students, are hopefully of use for everyone interested in learning about psychiatry. It derives from the Newcastle University course and teaching resource (

The videos all use role players to portray patients.

Videos are posted subject to Creative Commons Attribution-Non-Commercial 2.0 UK: England & Wales licensing (

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