Course of Pelvis Neurovascular Content

Question 1

Femoral Nerve

Answer 1

Origin: Posterior Divisions of L2-L4 primary ventral Rami ‘Lumbar Plexus’

Course: Originates in the lower abdomen, travels through the false pelvis with the external Artery+vein, then through the opening deep to inguinal ligament, into the anterior thigh. (travels with femoral vein)

Location of innervated muscles:
Anterior Thigh- Extends Knee

Question 2

Obturator nerve

Answer 2

Origin: Anterior divisions of L2-L4 Primary Ventral Rami ‘Lumbar Plexus’

Originates in the lower abdomen, travels through the false and true pelvis, before exiting the pelvis via the obturator canal, to enter the medial thigh

Location of innervated muscles:
Gluteal region- Abducts Hip

Question 3

Tibial Nerve

Answer 3

Origin: anterior Division of L4-S3 Primary Ventral Rami ‘Sacral Plexus’

Originates in the lower abdomen, travels through the false and true pelvis with the common fibular (perineal?) nerve as part of the sciatic nerve, alongside the superior and inferior gluteal nerve. Exits the pelvis via the GSF to enter the gluteal region

Location of muscles innervated:
Posterior Thigh/ Leg- Flexes Knee+ Ankle

Question 4

Common Fibular Nerve

Answer 4

Origin: Posterior Divisions of L4-S3 Primary Ventral Rami ‘Sacral Plexus’

Originates in the lower abdomen, travels through the false and true pelvis with the tibial nerve to form the sciatic nerve, alongside the superior and inferior gluteal nerve. Exits the pelvis via the GSF to enter the anterior leg

location of muscles innervated: anterior leg- Dorsiflex (extend) Ankle

Question 5

Principles

Answer 5

Muscles which produce:

Abduction, Extension, or external rotation are usually innervated by nerves derived from posterior divisions of anterior primary rami in nerve plexus

Adduction, Flexion or internal rotation are usually innervated by nerves derived from anterior divisors of primary rami in a nerve plexus.