Who is Witty Ticcy Ray from The Man Who Mistook His Wife for a Hat and Other Clinical Tales and what is their importance?

Witty Ticcy Ray is also a fun character. He suffers from Tourrette's Syndrome which has had positive and negative effects on his personal life. He performs as a jazz drummer and is widely popular for his outrageous outbursts on the drums, but he is prone to verbal outbursts that make his relationship with his wife difficult.