unit 6: lumbar plexus, obturator nerve

Question 1

obturator nerve contains fibers from L2-L4, ___ is the major contributor and __ is minimal

Answer 1

L3

L2

Question 2

obturator n. travels medial to __ __, post to the common iliac vessels and descends into the pelvis, traveling on the ___ ___

Answer 2

psoas major

obturator internus

Question 3

after leaving the obturator foramen, obturator n. divides into an ant & post branch, which are sep. initially by the ____ ___ and then by adductor brevis

Answer 3

obturator externus

Question 4

obturator nerve sends some branches to communicate with those from the femoral nerve, forming the __ __

Answer 4

subsartorial plexus

Question 5

the subsartorial plexus contributes to the supply of the skin on the

Answer 5

medial thigh

Question 6

the TERMINATION of the anterior obturator branch supplies the __ ___ while it sends ARTICULAR branches to the __ joint

Answer 6

femoral artery

hip

Question 7

muscles supplied by the anterior obturator branch

Answer 7

adductor longus
gracilis
pectineus
adductor brevis

Question 8

if present, the anterior obturator branch may connect with the __ __ nerve as well as the medial cutaneous nerve of the thigh and ___ nerve (skin/upper medial leg)

Answer 8

accessory obturator

saphenous

Question 9

the POST obturator branch travels ___ obturator externus, ___ to adductor brevis, and ___ to adductor magnus

Answer 9

through
posterior
anterior

Question 10

three muscles supplied by posterior obturator branch, in addition to articular fibers to the knee joint

Answer 10

obturator externus
adductor magnus
adductor brevis