Table 1 Neurological deficit scores on a five-point scale in rats

Normal (no neurological deficit)

0

Rats behave normally, can fully outstretch forelimbs toward the ground when lifting tails and dangling.

Mild neurological deficit

1

Rats cannot fully stretch their left forelimbs when lifting tails and dangling.

Moderate neurological deficit

2

Rats have decreased resistance to lateral push and mild neurological behavior.

Severe neurological deficit

3

Rats turn around into a circle, and have mild and moderate neurological behavior.

4

Rats do not walk spontaneously and have a depressed level of consciousness.