Table 1.

The scoring system of the stereotyped behavior

Score	Behavior description
0	Stationary, little or no movement
1	Normal movement accompanied by repeated exploration in situ or no fixed direction of repeated exploration
2	Ran fast around the open field, circled, climbed, and jumped repeatedly
3	Repetitive movements of the head or tail, either up or down, directed toward one wall or corner of the chamber, experienced repeated convulsions and hiccups or sustained an arched position