Table 2. The number of contact structures in each pattern.

Pattern	Contact	Max. dia.	Relationship with NB	IVA	IVB	ICL	ICB	Total
#S1	1	≥1 µm	Separating	14	1	0	9	24
#S2	1	≥1 µm	Protruding	50	11	1	2	64
#S3	1	<1 µm	Separating	16	1	0	7	24
#S4	1	<1 µm	Protruding	17	1	1	0	19
#M	≥2	NA	Protruding	27	11	1	0	39
Total				124	25	3	18	170

#M, multi-contact type; NA, not applicable; NB, nerve bundle. The other abbreviations are explained in the Table 1 footnote.