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` Question 1 Explain carpal tunnel syndrome. What structures are involved, and what pathology exists here? Recommend prevention tips and treatments for this syndrome. Explain the modified Allen test and Tinel's sign. Carpal tunnel syndrome in the numbness and tingling in the hand and arm due to the median nerve being compressed in the wrist. The carpal tunnel is a narrow passageway in the wrist, about an inch wide. The floor and sides of the tunnel are formed by small wrist bones called carpal bones. The median nerve is one of the main nerves in the hand. It originates as a group of nerve roots in the neck. These roots come together to form a single nerve in the arm. This is how carpal tunnel syndrome in the hand will affect the arm also. Carpal Tunnel syndrome can be prevented with several different exercises. There is not one thing that will prevent carpal tunnel so there are several things you can do. Stretching, taking breaks, keep your wrist in a neutral position as much as possible, switch from left to right hand, and wear a wrist brace. Carpal tunnel gets worse and more painful with time. The longer you go without treatment the worse it will get. The sooner you recognize the symptoms and get treatment the better off you are. The modified Allen test is simply a test that your doctor conducts to see how well your blood flows threw your wrist. This test is normally conducted before carpal tunnel surgery is conducted. Tinel’s sign is again simply a way to detect irritated nerves. By lightly tapping on and around the wrist to see if the doctor can make the tingling and numbness sensations occur.