Table II.

Mean distance and standard deviation between top 5% of activation (mm)

	R1	R2	R3	R4	R5
R1	—	5.4 (2.9)*	10.5 (1.7)*	9.2 (1.8)*	3.1 (1.7)
R2	—	—	6.3 (2.5)*	4.9 (2.4)	4.0 (2.4)
R3	—	—	—	3.0 (1.6)	8.4 (2.1)*
R4	—	—	—	—	7.0 (2.1)*
R5	—	—	—	—	—

^*indicates >5 mm.