Table 1.

Primary and secondary CSD wave characteristics

Experiment number		1	2	3	4	5	Mean ± S.E.M.
Wave number	SSG	3	2	1	6	11	–
	MG	2	1	0	5	7	–
Velocity (mm min−1)	Primary	2.8	2.2	5.9	5.0	3.2	3.8 ± 0.70
	Secondary	2.1	2.4	–	1.6	1.7	2.0 ± 0.18 *
ADC decrease (%)	Primary	19.2	18.5	21.0	29.2	11.8	19.9 ± 2.8
	Secondary	11.2	12.4	–	19.2	11.7	13.6 ± 1.9

Number and spread of CSD waves were determined by inspection of the high-b movies. SSG, suprasylvian gyri; MG, marginal gyri.

^*Secondary velocity < primary velocity (P < 0.05, Student's t test).