This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Regional anaesthesia, Subject name: Anaesthesia
Sciatic nerve blockade provides sensory loss of the 
Select and explain. 
A. Anterior and lateral thigh, B. Posterior thigh and majority of the leg below the knee, C. Medial and posterior thigh, D. Medial leg below the knee
B: Posterior thigh and majority of the leg below the knee
Answer: B: Posterior thigh and majority of the leg below the knee 
Explanation: Sciatic nerve blockade results in sensory loss to the posterior thigh by blocking the posterior cutaneous nerve along with everything below the knee, except for the medial lower leg, which is innervated by the saphenous nerve.