What is brachialeuritis or radicilitus?

Brachial neuritis, also known as brachial radiculitis or Parsonage-Turner syndrome, is a neurological condition characterized by sudden onset of shoulder and upper arm pain, often followed by weakness or atrophy of the affected muscles. It typically results from inflammation of the brachial plexus nerves, which can be triggered by viral infections, trauma, or other underlying conditions. The pain usually subsides over time, but recovery of muscle strength may take several months to years. Diagnosis is often made through clinical evaluation and imaging studies to rule out other causes.