Lumbosacral Plexus and Inguinal Region

lateral cutaneous femoral nerve

posterior division, L2-L3

femoral nerve

posterior division, L2-L4

obturator nerve

anterior division, L2-L4

superior gluteal nerve

posterior division, L4-S1

inferior gluteal nerve

posterior division, L5-S2

nerve to piriformis

posterior division, S1-S2

sciatic nerve

L4-S3

tibial division of sciatic nerve

anterior divisions

fibular division of sciatic nerve

posterior divisions

posterior femoral cutaneous nerve

anterior division, S1-S3

pudendal nerve

anterior division, S2-S4

nerve to quadratus femoris

anterior division, L4-S1

nerve to obturator internus

anterior division, L5-S2

L1/L2 quarter screen

hip flexion

L3 quarter screen

knee extension

L4 quarter screen

dorsiflexion

L5 quarter screen

great toe extension, functional heel walk

S1 quarter screen

eversion, plantar flexion, functional toe walk

floor of inguinal canal

inguinal ligament

roof of inguinal canal

internal oblique and transverse abdominis

anterior wall of inguinal canal

external oblique aponeurosis

posterior wall of inguinal canal

transversalis fascia, internal oblique, conjoined tendon

travel through the inguinal canal in males

iliinguinal nerve and spermatic cord

travel through the inguinal canal in females

ilioinguinal nerve and round ligament of uterus

indirect inguinal hernia

abdominal contents travel through inguinal canal; more common

direct inguinal hernia

abdominal contents push through anterolateral abdominal wall muscles

sports hernia

damage to core muscles