Introduction The common peroneal nerve (also known as the common fibular nerve) is a branch of the sciatic nerve, originating in the lumbosacral plexus (L4-S2). It wraps around the head of the fibula, making it vulnerable to injury. The nerve then divides into the superficial and deep peroneal nerves, innervating the lateral and anterior compartments…
Introduction The obturator nerve is a peripheral nerve that arises from the lumbar plexus (L2-L4) and primarily supplies the medial thigh. It provides motor innervation to the adductor muscles (adductor longus, adductor brevis, adductor magnus, gracilis, and obturator externus) and sensory innervation to the skin of the medial thigh. In several pathologic disorders and operations…
Introduction The sural nerve is a sensory nerve in the lower leg, originating from the tibial and common fibular (peroneal) nerves. It runs along the posterior aspect of the calf and provides sensation to the lateral side of the foot and ankle. The sural nerve is often used as a donor nerve for grafting procedures…
Introduction The femoral nerve is a major peripheral nerve of the lower limb, originating from the lumbar plexus (L2-L4). It supplies motor innervation to the anterior thigh muscles (e.g., quadriceps) responsible for knee extension and hip flexion, and provides sensory innervation to the anterior thigh and medial leg via the saphenous nerve. It plays a…
Introduction The tibial nerve is a major branch of the sciatic nerve and is part of the lumbosacral plexus. It originates from the L4-S3 spinal nerves and runs down the back of the leg. From the popliteal fossa, the tibial nerve descends into the leg’s posterior compartment. Along with the posterior tibial vessels, it travels…
Introduction The ulnar nerve is a major peripheral nerve that runs from the neck down to the hand, playing a crucial role in movement and sensation. It controls fine motor functions in the hand and provides sensation to the ring and little fingers. Often referred to as the “funny bone” nerve, it is vulnerable to…
The median nerve is a major nerve of the upper limb, originating from the brachial plexus (C5-T1). It runs down the arm, forearm, and into the hand, providing motor innervation to most forearm flexor muscles and some hand muscles, and sensory innervation to the lateral palm, thumb, index, middle, and half of the ring finger….
