Table 1 Groups for Shuttle-box Avoivance in Hamsters								
										
										
										
	Groups	Operations	US intensity (V)	Trials / day	Box size	Recovery (W)	CS	N		
										
	N-100-30	intact	100	30	  usual 1)	 -	  flicker 3)	12		
	N-100-50	intact	100	50	usual	 -	flicker 	5		
	N-200-50	intact	200	50	usual	 -	flicker 	9		
	N-200-50-s	intact	200	50	  small 2)	 -	flicker 	7		
	N-300-50-s	intact	300	50	small	 -	flicker 	7		
	B-100-30	blind	100	30	usual	1	flicker 	9		
	B-100-50	blind	100	50	usual	12	flicker 	4		
	B-300-50-s	blind	300	50	small	1	flicker 	4		
	O-100-30	one eye lesion	100	30	usual	1	flicker 	7		
	PN-100-30/50	PN grafted	100	30(3)/50(2)	usual	 8-12	flicker (3)/continuous (2) 4)	5		
	PN-300-50-s	PN grafted	300	50	small	 8-12	flicker 	4		
										
										
	"1) usual box size was 21 cm wide, 29 cm long  and  19 cm high "									
	"2) small box size was 21 cm wide,12 cm long and 7 cm high"									
	3) a 60W light bulb flickering  at 2.5 Hz									
	4) continuous-on of a 6W fluorescent light tube in 2 PN grafted hamsters trained 30 trials daily