Table 1.

Systematic anatomy of the adductor muscles in the albino rat.

Muscle	Origin	Insertion	Innervation
Cranial gracilis muscle	cranial and caudal pubic rami	cranial border of the tibia between tibial tuberosity and insertion of the semitendinosus muscle	cranial branch of the obturator nerve
Caudal gracilis muscle	ramus of ischium	medial surface of the tibia deep to the insertion of the cranial gracilis muscle	cranial branch of the obturator nerve
Adductor longus muscle	cranial and caudal pubic rami, ramus of ischium	medial lip of the facies aspera of the femur (fused with distal portion of insertion of pectineus muscle)	cranial branch of the obturator nerve
Adductor brevis muscle	cranial and caudal pubic rami	femoral part medial and lateral lip of facies aspera, medial and lateral supracondylar tuberosities	cranial branch of the obturator nerve
		genicular part medial femoral epicondyle, medial patellar retinaculum, medial tibial condyle
Adductor magnus muscle	ramus of ischium	distal part of caudal aspect of the third trochanter, lateral lip of the facies aspera between adductor minimus (proximal) and adductor brevis (distal)	caudal branch of the obturator nerve
Adductor minimus muscle	cranial and caudal pubic rami (95% of cases), ramus of ischium (75% of cases)	caudal aspect of the third trochanter	caudal branch of the obturator nerve
Obturator externus muscle	cranial and caudal pubic rami, ramus of ischium, cranial margin of tabula of ischium, outer aspect of the obturator membrane	trochanteric fossa, fibrous capsule of the hip joint	obturator nerve (trunk)
Obturator intermedius muscle	cranial pubic ramus		obturator nerve (trunk)

For each muscle, the exact origin, insertion, and innervating nerves are summarized here. Within this muscle group, there were only rare remarkable variations, which are given in percentages.