MRCP UK EXAMINATIONS

Detailed explanation-1: -The tibial nerve is one of the two terminal branches of the sciatic nerve, the largest nerve in the human body. The tibial nerve originates from the L4-S3 spinal nerve roots and provides motor and sensory innervation to most of the posterior leg and foot.

Detailed explanation-2: -The tibial nerve travels through the popliteal fossa and passes between the two heads of the gastrocnemius muscle. The continuation of the tibial nerve below the upper level of the fibrous arch of the soleus muscle is sometimes referred to as the posterior tibial nerve.

Detailed explanation-3: -In the upper two-thirds of the leg the nerve is located deep in the posterior compartment, while in the lower one-third of the leg it assumes a superficial location along the medial border of the Achilles tendon. The PTN lies lateral and posterior to the posterior tibial artery and vein.

Detailed explanation-4: -Tibialis posterior is innervated by the tibial nerve which arises from the L4 and L5 spinal nerves. The tibial nerve is the larger of the two branches of the sciatic nerve.

Detailed explanation-5: -The tibial nerve is a mixed nerve with both motor and sensory function, and part of the peripheral nervous system. Mixed motor and sensory nerves enable electrical impulses to travel between muscle cells and the spinal cord.