Definition The lower extremity sensation is provided mainly by two major nerves: the sciatic (posterior) and femoral (anterior) nerves. The lumbar plexus consists of the ventral rami of L1-L4 with occasional contribution from T12. The lumbar plexus forms the lateral femoral cutaneous (L2-L3) which innervates the lateral thigh, femoral (L2-L4) innervating the anteromedial thigh and […]