I was not able to locate the footage that shows him come forward in the court hearing (I may have forwarded past it). But I found these videos:
http://www.youtube.com/watch?v=Y5lz...494A0A01&playnext=1&playnext_from=PL&index=15
After viewing the above video, I would have to say that BC's paralysis line is actually higher than my nephew's because BC has impaired breathing much more than my nephew does. Note that there is no arm movement while he talks, just shoulder movement.
And this video:
http://fr.truveo.com/Brad-Conway-Caylee-Anthony-Memorial-Service-1of-2/id/567627579
shows best how he moves his arms with his shoulders. Watch right up front when he moves his arms by lifting his shoulders.
Okay, this court video shows he has limited control over his arms (he seems to have better control from the shoulder to the elbow than my nephew has. When my nephew moves his arms in the manner that BC does it's not as smooth as BC).
http://www.wftv.com/video/18265423/index.html
at about 17:50 or so shows that BC has limited control over his arms (i.e. he can manipulate down to the elbow). And he does not have full use of his hands (this is like my nephew). Note that when he brings his hand up to his tie, his fingers are curled under his hand (i.e. they are paralyzed) and he adjusts his tie in a clumsy "gross movement". (no digital control, other than he can get a bit of a "pinch" with his thumb against his curled fingers) This inability to use his hands classifies him a quadriplegic.
To be clear, quadriplegics can do a lot of things, but its just much harder for them and they have to relearn how to do it. For instance, I put my nephew to work with me when I had my own business. I taught him how to use a trackball mouse by placing his hand on the ball and then manipulating it by moving his upper arm/shoulder area. Also, he had a "stiffener" brace that could strap to his hand that put his pointer finger in a brace. We would then tape a #2 pencil to his finger and he could type (very very slowly). He worked spreadsheets for me for months this way.
It's all in the will to live and the perseverance to go on. That and where your paralysis line is. For instance, with Christopher Reeves (whose fracture was at like the C3/C4 area...there's no shoulder movement or even independent lung function at that point.