A patient in a profound stuporose state shows a flat, deadpan facial expression with no change when emotionally significant topics are raised, altered muscle tone with limbs that can be moulded into new positions and remain there, and episodes of urinary incontinence. Before revealing the answer: is this depressive stupor?

No, this is more consistent with catatonic stupor than with depressive stupor. Depressive stupor retains a recognisably depressed facial expression that worsens with affect-laden material, normal muscle tone, and the absence of catalepsy and incontinence; here, the deadpan facial quality unresponsive to emotional content, the altered muscle tone with mouldable limbs (catalepsy), and the incontinence are all features typical of catatonic stupor rather than the depressive form.