The key difference between myelinated and unmyelinated nerve fibres is that the myelinated nerve fibres have myelin sheaths around them while the unmyelina
Sensitivity to Pressure : A > B > C Sensitivity to Hypoxia : B > A > C Sensitivity to Local Anaesthetic : A gamma & A delta > A alpha & A beta > B > C (Ref: Read text below) Miller's Anaesthesia (7th ed , pg 921 , 922 ) "Different fiber types are differentially sensitive to local anesthetic blockade. In vivo experiments in which continuous superperfusion of peripheral nerve allows equilibration with drug and experiments in which a drug bolus is delivered by percutaneous injection, analogous to clinical peripheral nerve block, show unequivocally that small myelinated axons (Aγ motor and Aδ sensory fibers) are the most susceptible to impulse annihilation. Next in order of block are the large myelinated (Aα and Aβ) fibers, and the least susceptible are the small, nonmyelinated C fibers. In fact, in this last group, impulses in the slowest conducting population (conduction velocity of 0.5 to 0.8 msec) are the most resistant to local anesthetic. The generalized notion that local anesthetics block the smallest fibers first or most is clearly wrong. "
Learn about the structure and the function of the facial nerve and understand what is a conduction block in Bell's palsy.
Small Fiber neuropathy and the link with Fibromyalgia - more than just burning feet and tingling hands
We go over how synapses work for activating motor neurons and the neuromuscular junction in detail. Then with that information, we see how it relates to pharmacology and clinical applications.
Pulling Down the Moon offers a variety of Holistic Healthcare services. For Chicago land holistic fertility support, call (312) 321-0004.
Should you heat or ice a sprained ankle? This article will talk about the effects of heat and ice on the recovery of sprained ankles, as well as when each modality may be preferred.
Shingles painful rash list symptoms and explains the cause of this infection. Helpful coping suggestions are provided.
The optic nerve is a cable–like grouping of nerve fibers, connecting the eye to the brain.
Researchers are testing ways to stimulate the vagus nerve to treat a slew of ailments.
Myo=muscle Fascial=fascia Fascia is the fibrous connective tissue that is just about everywhere in the body. It surrounds every muscle muscle fiber, tendon, bone, blood vessel and nerve fiber in order to give the body its shape and structure and connectivity. Healthy fascia also lubricates and nourishes the surrounding organs and tissues. Fascia is the link, the thread of continuity that goes through the whole body. What is myofascial stretching? It’s a form of active stretching that precisely targets a muscle and also the fascia that surrounds specific muscles and joints. When we do myofascial stretching, we consider the 3 dimensional shape of a muscle, the way the fascia merges into the multiple attachment points of the muscle, as well as the multidirectional blending of the fibers into the surrounding joint tissue. So we are stretching not just a muscle, but the whole global fascial chain. (This is why we often include rotation or emphasize the position of the wrists/hands and feet/ankles during certain stretches and ELDOAs). The goal of myofascial stretch is to help the sliding/gliding nature of the muscles and fascia against each other to keep the tissue healthy and to improve hydration […]
A clear picture of psychosomatic symptoms due to stress is the doctor’s conclusion! What is this?
Did you know that almost every organ in your body is covered or supported by fascia? Fascia is a unique connective tissue made mostly of collagen that helps to connect everything in the body and provides support and lubrication to all of your organs, muscles, blood vessels, and nerves. Think…
Small Fiber Neuropathy (SFN) results in burning pain, numbness, odd sensations, or autonomic nervous system issues. Learn more about the possible causes and potential solutions to this debilitating disorder.
What does the vagus nerve do? And why is it so important? (Hint: It’s NOT the courage you need to gamble in Nevada’s casinos.) The vagus nerve is actually a bundle of nerve fibers that stretch from the brain stem down into the colon. It’s called “vagus” because it wanders like a vagabond from the back of the neck down into the digestive system. These nerve fibers can be found on the right and left sides of your body, connecting most of your major organs. It’s known as the “wonder nerve” because of the crucial role it plays in your
Struggling with afferent vs. efferent neurons? Check out our Crash Course Review to master this key concept for the AP® Psych exam.
