Human obturator nerve: Gross anatomy

Table 1 Formation (spinal nerves) of the obturator nerve studied on 88 lumbar plexuses

Spinal nerves(fibers)	Number of lumbar plexuses				Total (n = 88)
	Left lumbar plexuses		Right lumbar plexuses		Males +
	Males	Females	Males	Females	Females
L1, L2, L3, L4	1	2	1	1	5 (5.64%)
L2, L3, L4	19	9	17	11	56 (63.60%)
L3, L4	4	4	4	2	14 (15.90%)
L2, L3, L4, L5	4	1	6	2	13 (14.72%)

Table 2 Muscular branches of the obturator nerve studied on 152 lumbar plexuses

Number ofbranches	Anterior branch	Posterior branch
1	-	14.47%
2	28.94%	60.52%
3	67.10%	19.07%
4	3.94%	5.92%
Muscles innervated	Gracilis (70.10%)	Adductor magnus (85.53%)
	Adductor longus (70.10%)	Adductor longus (85.53%)
	Adductor brevis (25.90%)	Adductor brevis (25.00%)
	Pectineus (4.00%)	Obturator externus (6.00%)