Table 1.

Experimental groups

Group	6-OHDA lesion	VM graft	n
Normal	No	No	10
Dom H-Les	Contralateral to the preferred paw	No	11
Non-dom H-Les	Ipsilateral to the preferred paw	No	9
Indiff H-Les	Right or left hemisphere	No	17
Dom H-Tx	Contralateral to the preferred paw	Contralateral to the preferred paw	19
Non-dom H-Tx	Ipsilateral to the preferred paw	Ipsilateral to the preferred paw	20
Indiff H-Tx	Right or left hemisphere	Right or left hemisphere	16

Seven experimental groups were built on the basis of the handedness in paw preference and performance in the staircase test. Dom, dominant; H, hemisphere; Indiff, indifferent or ambidextrous; Les, 6-OHDA lesion; Tx, 6-OHDA lesioned and transplanted.