Table 5.

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

Criteria	Variations	Left hemisphere		Right hemisphere
		Mean (%)	κ	Mean (%)	κ
Number of segments	2	60	0.95	70	1
	3	37	0.94	30	1
	4	3	1	0	1
Marginal PreCS		30	0.89	37	0.90
Medial PreCS	0	13	0.83	23	0.90
	1	60	0.77	53	0.86
	2	27	0.89	23	0.98
Superior segment	Arcuate termination	43	0.82	33	0.95
	With Y-shaped end	10	0.93	10	1
	T-shaped side anastomosis	33	0.77	47	0.91
	With Y-shaped end	13	0.76	10	0.93
Inferior segment	Arcuate form	33	0.86	17	0.94
	Ramified form	33	0.90	40	0.95
	Bayonet form	10	0.88	27	1
	Y-shaped end	23	0.94	17	1
Inferior end	Extension into SF	60	0.90	50	1
	Straight shape	97	1	90	0.61
	Y-shape	3	1	10	0.61
Connections	With CS	27	0.91	10	1
	With superior FS	80	1	73	0.91
	With intermediate FS	23	1	27	0.91
	With inferior FS	77	1	57	1

Sulcal criteria with high inter-rater concordance (κ > 0.8) are shown in bold font. Measures that significantly differ between in vivo and ex vivo data values (p-value < 0.05) are underlined. PreCS, precentral sulcus; CS, central sulcus, SF, sylvian fissure; FS, frontal sulcus.