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Table 1 Established six-point seizure scale

From: A comparative study of the phenotype with kainic acid-induced seizure in DBA/2 mice from three different sources

Level Characteristic behaviors
1 Unmoving and crouched in a corner, staring
2 Body stretched out, tail becomes straight and rigid, ears laid back, bulging eyes
3 Repetitive head bobbing, rears into a sitting position with forepaws resting on belly
4 Rearing and falling, tonic-clonic seizures broken by periods of total stillness, jumping clonus, running clonus
5 Continuous level 4 seizures
6 Body in clonus, no longer using limbs to maintain posture, usually precursor to death