Table 1. Neurologic severity score (NSS).

Task description	Score
Failure to exit a 30-cm-diameter circle within 3 min	1
Loss of interest to environment (seeking behavior)	1
Monoparesis/hemiparesis	1
Failure to walk straight	1
Loss of startle reflex	1
Inability to balance on a 7-mm width beam	1
Inability to walk on a 3-cm width beam	1
Inability to walk on a 2-cm width beam	1
Inability to walk on a 1-cm width beam	1
Inability to balance on a 5-mm round stick	1
Maximum score	10