10.4 Neurovasculature of the Lower Limb Flashcards
Iliohypogastric and ilioinguinal nerve root(s)
L1
Genitofemoral nerve roots
L1, L2 (Of course there are two…)
Lateral femoral cutaneous nerve roots
L2, L3 (still two on the skin, but one step after the genitofemoral)
Femoral nerve roots
L2, L3, L4 (Four = Femoral; 3 roots because it’s important)
Obturator nerve roots
L2, L3, L4 (OF course the Obturator is same as Femoral)
Superior gluteal nerve roots
L4, L5, S1
Inferior gluteal nerve roots
L5, S1, S2
Sciatic nerve roots
(Five roots, ends at S3)
L4, L5, S1, S2, S3
Posterior femoral cutaneous nerve roots
S1, S2, S3
Pudendal nerve roots
S2 S3 S4 (lets the piss out the door)
In one go, describe the blood supply to the lower limb, including which arteries supply which structures
- Aorta
- Terminal branches are common iliac arteries (level of iliac crest; L4)
- Internal iliac: obturator anteriorly (medial thigh), sup and inf gluteal arteries posteriorly
- External iliac becomes femoral after crossing inguinal ligament
- Femoral (anterior thigh) gives off deep femoral (posterior thigh)
- Femoral passes through the adductor hiatus, creating the popliteal artery
- Becomes posterior tibial (posterior leg), gives off anterior tibial (anterior leg) and fibular (lateral leg)
- Posterior becomes medial and lateral plantar arteries
- Anterior tibial becomes dorsalis pedis
Which nerve innervates the anterior, posterior, and medial thigh?
Anterior: femoral (like a.)
Medial: obturator (like a.)
Posterior: sciatic
Which nerves innervate the posterior, lateral, and anterior leg?
Posterior: Tibial
Lateral: Superficial fibular
Anterior: Deep fibular