A patient begins a sentence with a complete, grammatically intact plan to describe a complex worry involving several connected concerns, but as she speaks, the parts become muddled and jumbled together so the overall meaning is lost, even though she remains aware something is not right. Before revealing the answer: is this transitory thinking?
No, this is more consistent with drivelling thinking than transitory thinking. Here the overall preliminary plan for the complex thought was present, with its necessary parts, but their organisation broke down, which is the defining pattern of drivelling thinking rather than the loss of an individual thought's constancy with grammatical disruption seen in transitory thinking.
References
- Casey, P. & Kelly, B. (2019). Fish's Clinical Psychopathology, 4th ed. Ch. 4, 'Disorders of Thought and Speech'.