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The sciatic nerve supplies sensation to the skin of the foot, as well as the entire lower leg (except for its inner side). Sensation to skin to the sole of the foot is provided by the tibial nerve, and the lower leg and upper surface of the foot via the common fibular nerve. [2]: 422–4 The sciatic nerve also innervates muscles.
The tibial nerve is the larger terminal branch of the sciatic nerve with root values of L4, L5, S1, S2, and S3. It lies superficial (or posterior) to the popliteal vessels, extending from the superior angle to the inferior angle of the popliteal fossa, crossing the popliteal vessels from lateral to medial side.
Sciatica may also occur during pregnancy, especially during later stages, as a result of the weight of the fetus pressing on the sciatic nerve during sitting or during leg spasms. [15] While most cases do not directly harm the woman or the fetus, indirect harm may come from the numbing effect on the legs, which can cause loss of balance and falls.
The common fibular nerve is the smaller terminal branch of the sciatic nerve. The common fibular nerve has root values of L4, L5, S1, and S2. It arises from the superior angle of the popliteal fossa and extends to the lateral angle of the popliteal fossa, along the medial border of the biceps femoris.
Sciatic nerve; Semilunar ganglion; Sensory nerve; Short ciliary nerves; Sphenopalatine nerves; Splenic plexus; Stylohyoid branch of facial nerve; Subcostal nerve; Submandibular ganglion; Suboccipital nerve; Superficial branch of the radial nerve; Superficial fibular nerve; Superior cardiac nerve; Superior cervical ganglion; Superior ganglion of ...
Lumboinguinal nerve (green) and Ilioinguinal nerve (purple). In modern texts, these two regions are often considered to be innervated by the genitofemoral nerve.; Medial cluneal nerves (pink) - labeled as "post. division of sacral"
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It is accompanied by the sciatic nerve and the posterior femoral cutaneous nerves, and covered by the gluteus maximus. [2] It is situated medial to the sciatic nerve. [1] It continues down the back of the thigh, supplying the skin, and anastomosing with branches of the perforating arteries. [citation needed]