A patient complies with every verbal instruction given during an examination, including one that produces an uncomfortable sensation, and continues to comply with further instructions in the same way immediately afterward, without any adjustment in response to that unpleasant experience. What is this?

This is automatic obedience: compliance with instructions regardless of their content, including instructions that are uncomfortable or repeatedly result in an unpleasant consequence, with a striking failure to adjust behaviour despite that repeated unpleasant experience. It is not Mitmachen (cooperation), in which the body can be passively moved into any position, since automatic obedience concerns compliance with verbal instructions specifically, not passive movement of the body by the examiner. It is not waxy flexibility, which concerns the quality of resistance felt during passive movement, not compliance with spoken instructions. And it is not negativism, which is active resistance or refusal, the opposite pattern to the indiscriminate compliance described here.