Just read a post from Aleem Bawany about Scott Adams getting back his conversational speech. Really interesting, how a person is able to sing and make professional speeches but lost his ability to conversate casually, the condition is called Spasmodic Dysphonia.
As Bawany explains that it seems that the ryming words seem to take a different neural path for processing than the casual words and if some neurons are damaged in the path of casual words, the person may be still able to sing or make a speech as in case of Scott Adams.
Interesting !
Aleem's Weblog 