The finding is waxy flexibility
When the nurse lifts the mute client's arm, it stays where it is placed for several minutes, and the nurse feels a slight, even resistance while moving it into a new position. This is waxy flexibility, also called cerea flexibilitas. The limb behaves like soft wax: it can be molded, and it then holds the new position. Two features define it: the examiner places the limb, and the limb stays there against gravity with slight, even resistance during movement.
Context: signs of catatonia
Waxy flexibility is one of the motor signs of catatonia, along with mutism, stupor, posturing, negativism, and echo phenomena. Catatonia can occur in schizophrenia, in mood disorders, and in medical conditions. The stem notes that her medical workup and neurologic examination are normal and that she has received no psychiatric medicine, which removes neurologic disease and drug-induced rigidity as explanations and supports a psychiatric catatonic picture. The mutism she shows during the interview fits the same pattern.
| Sign | Who positions the body | Key feature |
|---|
| Waxy flexibility | The examiner | Limb stays where placed; slight, even resistance |
| Posturing | The client herself | Client assumes and holds a position against gravity |
| Negativism | Neither; client resists | Opposes or resists all instructions or attempts to move her |
| Psychomotor retardation | Not applicable | Generalized slowing of movement and speech |
Why the other terms are wrong
Watch out! Posturing is the closest distractor, because both involve holding a position. The difference is who sets it: in posturing the client assumes the position on her own; here the nurse placed the arm. Negativism would show as resistance to being moved or doing the opposite of what is asked, but her arm accepts placement. Psychomotor retardation is generalized slowing seen in depression and does not explain a limb remaining exactly where it is placed.
Nursing care for a client with catatonic signs
A client with catatonia may not eat, drink, or move, so the nurse monitors nutrition and hydration, intake and output, skin integrity, and risk of venous thromboembolism, and assists with positioning and range of motion. The nurse speaks to her calmly and explains care even though she is mute, because catatonic clients may be aware of their surroundings. The finding is documented with an objective description of what was observed and reported to the physician.
Exam takeaway
Key point! Examiner places limb and it stays, with slight resistance = waxy flexibility. Client chooses and holds a position = posturing. Always ask who positioned the limb before choosing between these two signs.