NOLS Wilderness Medicine Wilderness First Responder (WFR) Practice Test

High Altitude Cerebral Edema (HACE) is a serious condition that can occur at high altitudes as a result of inadequate acclimatization. One of the hallmark symptoms of HACE is ataxia, which refers to a lack of voluntary coordination of muscle movements, often leading to difficulties with balance and gait. This symptom indicates that the brain is being affected, and it is typically a sign of a more severe stage of altitude sickness. In the context of HACE, it's important to recognize that ataxia can present even before other symptoms like headaches develop, which may not always be present. This makes ataxia a critical symptom to watch for in individuals exhibiting signs of altitude sickness. Early recognition and response are crucial, as HACE can progress rapidly and result in life-threatening complications if not treated promptly. Understanding that ataxia is a significant sign of HACE helps in identifying and managing this condition effectively in wilderness settings.