Table 1.

Seizure behavior classification grading scale

Seizure grade	Description of corresponding seizure behavior
Grade 1	Loss of posture associated with facial clonus, including chewing, and clonus of forelimbs and/or hindlimbs
Grade 2	Grade 1 seizure followed by recovery of the righting reflex and low‐intensity bouncing
Grade 3	Grade 1 and/or 2 features with recovery of the righting reflex followed by wild running and popcorning
Grade 4	Grade 3 followed by forelimb and/or hindlimb treading
Grade 5	Grade 3 and/or 4 followed by bilateral tonic extension of the forelimbs
Grade 6	Grade 5 followed by bilateral tonic extension of the hindlimbs
Grade 7	Grade 6 followed by immediate death