Wallenberg syndrome is a rare condition that affects the nervous system and causes a variety of neurological symptoms that vary in severity from person to person. Many people find their symptoms improve over time, while others experience lifelong neurological problems. Doctors may also refer to Wallenberg syndrome as lateral medullary infarction because a stroke in the lateral medulla region of the brain is a common cause. However, it's not always possible to say for certain why a person has developed the condition.
The nature and severity of the symptoms of Wallenberg syndrome depend on the cause and exact location of the brain damage. Many people with the condition lose the ability to feel pain or temperature, or experience weakness or numbness. These changes in sensation usually occur on one side of the body. The person may also have trouble swallowing, vomit, or develop uncontrollable hiccups. They may also have difficulty balancing and develop a hoarse voice.
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