MEDIVEERSETHE PRACTICAL HUB
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sciatic illustration: original labelled anatomical illustration.
Image: InjuryMap · Source / original · CC BY-SA 4.0Sciatic nerve
Understand what you see.
Supplies posterior thigh and, through its divisions, most leg and foot musculature.
Zoom into the original labels. Practise pointing out each structure, then explain it aloud. Diagrams are teaching references; specimen appearance and slide staining vary.
How to recognise it.
- Large sacral plexus branch
- Usually exits below piriformis
- Contains tibial and common fibular components
Point them out.
Tap a number to open its reference, zoom in and locate the structure. Numbers stay the same across views. This key follows landmarks visible in the reference images.
Think first. Then reveal.
Say your answer aloud before opening the suggested response.
01How do you identify sciatic nerve?+
Large sacral plexus branch. Usually exits below piriformis. Contains tibial and common fibular components.
02Is its division always at the popliteal fossa?+
No. Division can occur higher in pelvis or thigh.
03Does it directly supply most skin of the posterior thigh?+
No. Posterior femoral cutaneous nerve is the main cutaneous supply there.
04What is its main functional or developmental significance?+
Supplies posterior thigh and, through its divisions, most leg and foot musculature. Key structures to recognise: L4–S3 roots; Tibial component; Common fibular component.
Read the references.
Credited anatomical plates, microscopy and university teaching references. Individual image credits appear below the viewer. Historical plates can use older terminology; use the lesson text for current names.