👀 Subtle spontaneous nystagmus? The head-shaking test is an essential clinical tool. This patient presented with mild vestibular symptoms, and spontaneous nystagmus was barely visible on initial inspection. After performing the head-shaking test (20 cycles at approximately 2 Hz), we were able to accentuate the underlying nystagmus, making it significantly easier to identify the pattern and laterality. 🔍 Why does this work? Head shaking fatigues the velocity storage mechanism and unmasks asymme