Waxy Flexibility vs Catalepsy vs Gegenhalten vs Mitmachen/Mitgehen
Waxy Flexibility Catalepsy Gegenhalten (Opposition) Cooperation (Mitmachen) and Mitgehen
Overview
All four describe how a catatonic patient's limbs respond when an examiner moves them passively, and the bedside test for each is essentially the same manoeuvre asked in a slightly different way. What separates them is the quality of resistance encountered: even wax-like resistance that then holds its position, sustained holding without a particular resistance quality, resistance that matches the examiner's own force, or no resistance at all despite being told to resist.
| Dimension | waxy-flexibility | catalepsy | gegenhalten | mitmachen-mitgehen |
|---|---|---|---|---|
| Resistance to the passive movement itself | A smooth, even resistance throughout the movement, likened to bending a soft wax rod | Not specifically about the resistance during movement, but about what happens once the limb is placed | Resistance that matches whatever force the examiner applies — gentle movement meets little resistance, forceful movement meets correspondingly greater resistance | No resistance at all — the body part can be moved into any position freely, and in the more extreme Mitgehen variant, even the lightest pressure is enough to move it |
| What happens once released | The limb stays held in the new position for an unusually long time | The posture is maintained, usually for over a minute, before the body slowly sinks back into a resting position | Not the defining feature — the sign is about resistance during the attempted movement itself | The moved part returns to its original resting position once released |
| Instruction given to the patient | None specific — the examiner simply moves the limb and observes | None specific — a simple bedside test involves lifting the patient's arm as if taking their pulse and observing whether it stays raised once released | None specific — the sign appears regardless of any instruction to resist or cooperate | The patient is explicitly instructed to resist the examiner's movements, which makes the complete absence of resistance the striking, defining feature |
| Distinguishing quality | The evenness and 'wax-like' quality of resistance while moving, combined with sustained holding afterward | The sustained maintenance of a passively placed posture, ending in a slow, spontaneous return to rest | The proportional, force-matching quality of the resistance, which can make it easy to miss unless specifically tested with firmer movement | The striking contradiction between the explicit instruction to resist and the complete absence of any resistance |
| Typical example | An examiner raises a patient's arm and it stays exactly where placed, moving into the new position with a smooth, wax-like quality of resistance | A patient's arm, lifted as if to take their pulse, remains raised in the air for over a minute before slowly lowering back down on its own | A gentle attempt to bend a patient's elbow meets almost no resistance, but a firmer attempt meets a correspondingly firmer, matched resistance | Despite being told firmly to resist, a patient's arm can be moved into any position with no resistance whatsoever, even from a single finger's pressure |
Common confusion
Students often treat these as one blurred idea of 'catatonic limbs staying where you put them,' without appreciating that each sign is tested and defined slightly differently, and that some (gegenhalten, Mitmachen/Mitgehen) are actually defined by the quality of resistance during the movement rather than by what happens afterward. Running through all four with the same simple passive-movement test, while paying attention to the specific quality of resistance and what happens on release, is the most reliable way to tell them apart at the bedside.
Clarifying questions
- When you move the limb, does it feel like bending a soft, even material the whole way through, or is there a matching, proportional resistance that gets stronger the harder you push?
- Once you let go of the limb, does it stay exactly where you placed it, slowly sink back down on its own, or return to where it started?
- Did you explicitly ask the patient to resist you, and if so, how much resistance did you actually encounter?
Provenance
Class B · tier T1 · lifecycle migrated_candidate
- Casey, P. & Kelly, B. (2019). Fish's Clinical Psychopathology, 4th ed. Ch. 8, 'Motor Disorders'.