Right- based on what Tyce said in this video, I'm starting to doubt that his brother is actually in a coma-as in a full on vegetative state. Tyce seems to acknowledge his brothercrippled (doesn't get around much) and possibly thathe's brain damaged (he doesn't deny that when Jace brings it up), but he does deny his brother is actually in a coma.
But then again this is coming from a jenkem huffing murheenn trained tea, so I'm probably wrong. It's interesting because Tyce's brother seems like the only person he doesn't shit on at every available opportunity.