Effect of thymoquinone on (A) BBB score and (B) water content in spinal cord tissue. ##P<0.01 vs. Sham; **P<0.01 vs. Model. SCI, spinal cord injury; Sham, sham surgery group; Model, SCI surgery group; Thymoquinone, SCI + thymoquinone group; BBB, Basso, Beattie and Bresnahan.