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…
What is a Guyon Canal Syndrome? Guyon’s Canal Syndrome, also known as Ulnar Tunnel Syndrome, is a condition caused by compression of the ulnar nerve as it passes through Guyon’s canal in the wrist. It can result from repetitive wrist motions, prolonged pressure, or trauma. Symptoms include numbness, tingling, weakness, and pain in the ring…
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….
The human nervous system consists of a vast network of nerves that transmit signals between the brain, spinal cord, and the rest of the body. These nerves are classified into: This system ensures communication and coordination throughout the body. What are Nerves? Nerves function like cables, carrying electrical impulses between your brain and the rest…
Dermatomes: What are they? Dermatomes are skin sites that receive sensory information from the Afferent nerve fibers that emerge from a certain spinal nerve root’s dorsal root. An external portion of a nerve that “communicates” with the spinal cord is known as a vertebral nerve root. The entire spinal cord is made up of nerve roots…
Neurotmesis is a type of severe peripheral nerve injury that results from nerve transection. Neurotmesis involves cutting off the entire nerve, affecting the endoneurium, perineurium, and epineurium. The myelin sheath, connective tissues, and axon are ruptured as a result of neurotmesis. When a peripheral nerve injury is severe enough to cause neurotmesis, the affected person as…
What is an Axonotmesis? The term “axonotmesis” describes the anatomical disruption of an axon that does not, or only partially, disturb the framework of connective tissue. Axonotmesis is a condition in which a peripheral nerve in one of the body’s limbs is injured. This type of injury results in damage to the axons and their…
