Anaes Vivas · Applied anatomy
Data viva — the lumbosacral plexus
A Primary anatomy data viva — interpret a lumbar + sacral plexus diagram; give the territories of the femoral (anterior thigh + medial leg via saphenous), obturator (adductors), sciatic (leg and foot below the knee, dividing into tibial and common peroneal) and pudendal (perineum) nerves; explain foot drop (common peroneal/L5) and meralgia paraesthetica (LFCN).
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Prompt
A Primary anatomy data viva — interpret a lumbar + sacral plexus diagram; give the territories of the femoral (anterior thigh + medial leg via saphenous), obturator (adductors), sciatic (leg and foot below the knee, dividing into tibial and common peroneal) and pudendal (perineum) nerves; explain foot drop (common peroneal/L5) and meralgia paraesthetica (LFCN).
Stimulus
A labelled diagram shows the lumbar plexus (L1-L4 within the psoas) with its branches and the sacral plexus (L4-S4 on the piriformis) with its branches, the sciatic nerve dividing at the knee. Talk through the diagram, give the territory of the femoral, obturator, sciatic and pudendal nerves, and explain the cause of foot drop.
References3ShowHide
- [1]Cui H, et al. Shamrock view and lumbar plexus. Comput Assist Surg, 2026.PMID 42284483
- [3]Gonzalez Godoy E, et al. Ultrasound-Guided Pulsed Radiofrequency of the Sciatic Nerve for Chronic Lower Limb Pain: A Real-World Cohort Experience. Cureus, 2026.PMID 42326120
- [8]Li M, et al. [A case report of peroneal nerve injury caused by peripheral nerve block anaesthesia of knee joint]. Chin J Orthop Traumatol, 2026.PMID 42338211