Table 4.

Mean occurrence frequency and inter-rater concordance of each criterion of the CS in the left and right hemispheres.

Criteria	Variations	Left hemisphere		Right hemisphere
		Mean (%)	κ	Mean (%)	κ
Interruptions	Continuous	97	1	97	1
Inferior end	Extension into the SF	13	0.96	17	0.92
	Anterior direction	40	0.86	53	0.79
	Posterior direction	60	0.86	47	0.79
	Straight shape	100	0.82	90	0.94
	“Y” shape	0	1	10	0.95
	“T” shape	0	0.91	0	1
Superior end	Extension into the medial surface	57	0.80	50	0.80
	Straight shape	100	1	93	0.94
	“Y” shape	0	1	3	0.95
	“T” shape	0	1	3	0.95
Side branches	Over precentral gyrus
	0	67		67
	1	27		20
	2	3	0.77	10	0.77
	3	3		3
	4	0		0
	Over postcentral gyrus
	0	85		83
	1	13		17
	2	2	0.88	0	0.84
	3	0		0
	4	0		0
Connections	With precentral sulcus	27	0.92	10	0.95
	With postcentral sulcus	0	1	0	1
	With small free sulcus in preC gyrus	0	0.95	7	0.95

Sulcal criteria with high inter-rater concordance (κ > 0.8) are shown in bold font. Measures with a significant difference between in vivo and ex vivo data values (p-value < 0.05) are underlined. preC, precentral.