chorea in acute rheumatic fever??

Question

why do u get chorea in acute rheumatic fever

Answer 1

Sydenham chorea is one of the major signs of acute rheumatic fever. It may be the only sign of rheumatic fever in some patients.
If acute rheumatic fever affects the brain, loss of coordination and uncontrolled movement of the limbs and face may occur. These movements are called chorea — from the Greek word "choreia," which means "choral dance." They're also sometimes called Sydenham's chorea, rheumatic chorea or St. Vitus' dance. Chorea occurs in about one in 10 rheumatic fever cases. Chorea usually subsides or disappears within weeks to months.
Please see the web page for more details on Sydenham's chorea.

Answer 2

Chorea is thought to be due to disturbance in the basal ganglia, but why some children with ARF develop it is unclear. Chorea is often insidious in onset, then in retrospect we say, how could we not have noticed? It's not as easy to diagnose as the textbooks suggest.