Thirty-nine children with upper-extremity CP , who were four to sixteen years of age and surgical candidates for the transfer of the flexor carpi ulnaris to the extensor carpi radialis brevis , pronator teres release , and extensor pollicis longus rerouting with adductor pollicis release , were prospectively assigned , either randomly ( twenty-nine patients ) or by patient/family preference ( ten patients ) , to one of three treatment groups : surgical treatment ( Group 1 ) ; botulinum toxin injections ( Group 2 ) ; or regular , ongoing therapy ( Group 3 ) .