Table 1.

The details of palmar type of median artery.

No.	Side	Origin	Course of the median artery in relation to median nerve (forearm)	Course of the median artery in relation to median nerve (carpal tunnel)	Outer diameter of the median artery in the carpal tunnel (mm)	Type of superficial palmar arch
1	Right	UA	Lateral to the MN	Anterior to the MN	0.9	SPA was absent
2	Right	CIA	Crossed the MN from lateral to medial side. Pierced the MN	Anterior to the MN	1.7	Anastomosed with ARI (branch of RA)
3	Left	AIA	Crossed the MN from lateral to medial side	Medial to the MN	2.1	Anastomosed with both the APP (branch of RA) and the UA
4	Left	AIA	Crossed the MN from lateral to medial side. Pierced the MN	Medial to the MN	1.6	Anastomosed with the UA
5	Left	UA	Anterior to the MN.	Anterior to the MN	0.8	SPA was absent
6	Right	CIA	Lateral to the MN	Anterior to the MN	2.4	Anastomosed with both the APP (branch of RA) and the UA
7	Right	CIA	Crossed the MN from lateral to medial side. Pierced the MN	Medial to the MN	2.6	Anastomosed with the UA
8	Left	AIA	Crossed the MN from lateral to medial side. Pierced the MN	Medial to the MN	1.2	Anastomosed with the UA
9	Left	CIA	Lateral to the MN	Anterior to the MN	2.3	SPA was absent
10	Left	UA	Crossed the MN from lateral to medial side. Pierced the MN	Medial to the MN	2	Anastomosed with the UA
11	Right	UA	Crossed the MN from medial to lateral side. Pierced the MN	Anterior to the MN	1.7	Anastomosed with both the APP (branch of RA) and the UA
12	Left	CIA	Lateral to the MN	Anterior to the MN	1.4	Anastomosed with the UA
13	Left	AIA	Lateral to the MN	Anterior to the MN	2.2	Anastomosed with the UA

UA ulnar artery, RA radial artery, MN median nerve, APP arteria princeps pollicis, ARI arteria radialis indicis, CIA common interosseous artery, AIA anterior interosseous artery, SPA superficial palmar arch