Table 2.

Size and statistical significance of rCBF changes in the LPO and the IPA

Tasks compared	LPO						IPA
	x	y	z	Volume, mm3	rCBF mean ± SE ml/100g per min	Significance*	x	y	z	Volume, mm3	rCBF mean ± SE ml/100g per min	Significance*
Roughness-motor control†	57	−16	15	563	9.0  ±  3.7	P < 0.002				513	−1.9 ± 3.0	ns
Roughness-length	55	−16	19	922	9.4  ±  3.2	P < 0.0004	38	−45	48	678	−8.7 ± 3.5	P < 0.0004
Roughness-shape	57	−14	18	427	16.6  ±  5.7	P < 0.008	36	−46	46	513	−15.1 ± 5.6	P < 0.002
Length-motor control				393	4.8  ±  5.8	ns	39	−37	45	1,714	12.1 ± 4.1	P < 0.0004
Shape-control‡	55	−15	18	393	1.2  ±  6.2	ns	37	−38	46	1,844	14.3 ± 4.9	P < 0.0004
Rough-length ∩ rough-shape	55	−15	18	393		P < 0.0004	36	−46	46	513		P < 0.002§
Length-motor ∩ shape-ctl.				393		ns	38	−36	47	1,146		P < 0.0001

ns, not statistically significant. 

^*The basis of the statistical analysis was the cluster analysis (7), not the average values of rCBF listed in the table. 

^†The rCBF in LPO and IPA during motor control was 53.2 ± 5.3 ml/100g per min and 49.8 ± 5.5 ml/100g per min, respectively. 

^‡The rCBF in LPO and IPA during control was 58.8 ± 6.2 ml/100g per min and 56.7 ± 5.0 ml/100g per min, respectively. 

^§The significance is for length-rough ∩ shape-rough.