Every year, tens of millions of Americanssuffer from nerve damage, some irreparably so. Science can heal bones, grow new organsand even restore our microbiomes, but why is it so hard to fix our nerves? Hey guys Lissette here for DNews The human body posses a remarkable abilityto heal. Bones refuse, skin wounds mend, and the immune system adapts to infection,after infection. But there’s one area of the body that struggles to recover after aninjury: The nervous system. Nerve damage can be some of the most debilitating and permanenttype of injury.
The nervous system is an incredibly complexnetwork used to send electrical information throughout your body. It can basically bedivided into two sections. With the brain and spinal cord making up the central nervoussystem or CNSâ€¦. and the nerves made up of fibers of sensory and motor neurons comprisingthe peripheral nervous system. Each cell in the nervous system from the tipof your finger up your arm, up your spinal column, into your brain, is very specialized.And each has a unique function on the pathway, like a circuit. If one these gets cut or injured,it’s hard for an exact replacement cell to be put in in the right spot. Think aboutwhen you get a cut on your skin. If the cut
goes deep enough, exact replicas of cellswon’t cover the wound, instead fibrous tissues form. which we call scars. And scars arepart of the problem in regrowing nerves, they often get in the way especially in the caseof spinal cord injuries. As part of the CNS, spinal cord injuries are notoriously difficultto heal; partially because of the way nerve cells in the CNS are made. According to the book, â€œResults and Problemsin Cell Differentiationâ€�, the CNS also has certain proteins that weirdly, inhibit cellregeneration. While this might sound like a bad idea, it’s hugely beneficial overallto the formation of the CNS. These cells need
to grow exactly where they are supposed to,just one out of place could be bad. Like. think of an electrical circuit, each unithas to be in a specific order in specific place to work. If one is out of place, theintegrity of the CNS is compromised. Neurons in the CNS also lack certain cleaningcells. Nerve cells are made up of many parts, but they send signals through threads coveredin a protective sheet of myelin. These threads are called axons. Axons are the long partof the cell that reaches out to the cell next to it to send information down the line.Like arms handing the bucket down the line in a bucket brigade. So these are obviouslysuper important and need protecting. That’s
where the Schwann cells come in. which areonly found in the Peripheral nervous system. Schwann cells, which aren’t neurons butGLEEL cells, produce the myelin that help protect the axons. But, a study publishedin The Journal of Cell Biology found they also clean up damaged nerves making wayfor the healing process to take place and new nerves to be formed. But the problem is.these Schwann cells are missing from the CNS. What they have instead are myelin producingcells called oligodendrocytes. But these cells don’t clean up damaged nerve cells at all.Which is part of the problem. So unfortunately, according to RichardG. Fessler professor at Rush University Medical
Center quot;There are currently no therapies whichsuccessfully reverse the damagequot; from injuries to the spinal cord. But research is currentlyunderway to examine the potential success of stem cell treatment, where stem cells areinjected directly at the injury site. Still, it will take a few years to see the resultsof such trials. But there are times your body can regeneratenerves. The peripheral nervous system doesn’t have the same blocking proteins that the CNShas, and Schwann cells help heal the damage. So it’s able to regrow nerves, albeit slowly.For instance, if you cut a nerve into your shoulder, it could take a year to regrow.By that time.the muscles in your arms could
Tingling Feet and Hands An Early Warning of Neuropathy
Tingling or numbness affecting your feet mayseem like a trivial symptom of no real importance. However, in this tutorial, I will explain whythis symptom may be very important with regard to your health in general and why you shouldnot ignore it. Tingling hands, feet, or hands and feet isan extremely common and bothersome symptom. Such tingling can sometimes be entirely innocentand temporary. For example, it could result from pressure on nerves when your arm is bentunder your head as you fall asleep. Or it could be from pressure on nerves when youcross your legs for too long. In either case, the quot;pins and needlesquot; effect which isusually painless is soon relieved by removing
the pressure that caused it. In many cases, however, tingling in the hands,feet can be severe, occurring at irregular times or continuously day and night. It alsocan accompany other symptoms. such as pain,Â itching, numbness, and muscle wasting. In such cases,tingling may be a sign ofÂ nerve damage. SuchÂ nerve damageÂ is known by s asÂ peripheralneuropathyÂ because it affects nerves distant from theÂ brainÂ and spinal cord, often inthe hands and feet. There are more than 100 different types of peripheral neuropathy.Over time, peripheral neuropathy can worsen, resulting in decreased mobility and even disability.Â
In fact, diabetesÂ is the number one causeof peripheral neuropathy, accounting for well over a third of cases. InÂ diabetic neuropathy,tingling and other symptoms often first develop in both feet and go up the legs, followedby tingling and other symptoms that affect both hands and go up the arms. About twothirdsof people with diabetes have mild to severe forms ofÂ nerve damage. In many cases, thesesymptoms are the firstÂ signs of diabetes. So here is the main point I want to make,tingling and numbness in the feet may be the first signs that you have a serious peripheralneuropathy and that you may have diabetes. Diabetes puts you at risk of heart attack,stroke, kidney failure, blindness and a long
list of other serious complications. So thattingling you have could be your only warning sign of a serious complication developingelsewhere in your body. Don’t ignore this symptom and please get a check up. Well I hope you have found this tutorial interesting.Do please remember to subscribe and that way you will be the first to see my next tutorialon leg health and venous disease. My name is Haroun Gajraj, thank you for watching.