Which sign is commonly associated with hepatic encephalopathy due to ammonia buildup?

• A. Asterixis
• B. Jaundice
• C. Nausea
• D. Right upper quadrant pain

Answer: (D)

Ammonia buildup in hepatic encephalopathy primarily affects brain function, leading to neuropsychiatric changes. The hallmark sign is asterixis, the flapping tremor you can notice when the patient extends the wrists and fingers. This reflects impaired cerebral metabolism from elevated ammonia affecting astrocyte function and causing cerebral edema, which presents as confusion, disorientation, or personality changes in a patient with liver failure. Jaundice, nausea, and right upper quadrant pain are common liver-related symptoms, but they do not specifically indicate hepatic encephalopathy. The neurotoxic effect of ammonia makes asterixis the sign most closely linked to this condition.