Hi Sydney,
To be classified as an AIS C, this patient would need either (1) voluntary anal sphincter contraction or (2) sacral sensory sparing AND motor function MORE than 3 levels below the motor level.
If this patient had sacral sensory sparing with his motor scores, he would be classified as an AIS B. His motor sparing is 3 levels below the motor level (C7), but not MORE than 3 levels. If he had sacral sensory sparing and motor function to C8, he would then be classified as AIS C.
On the second page of the ISNCSCI form, you can find these criteria in the footnote (marked with a **) in the middle column.
Hope this helps!
Chrissy