[by:www.51voa.com] [00:00.00]更多听力请访问51VOA.COM [00:00.20]A new blood test can tell doctors [00:03.32]whether a person has suffered a concussion [00:06.44]up to a week after he or she was injured. [00:11.68]A study describing the test was published in the journal JAMA Neurology. [00:20.32]People who suffer a head injury should rest soon after they are hurt. [00:26.92]Doctors say rest is important in helping the brain to heal after the injury. [00:34.56]Individuals who have suffered a concussion do not always show symptoms. [00:41.60]Experts say those warning signs can be delayed, especially in children. [00:48.56]A concussion can lead to a feeling of dizziness, [00:53.44]headaches and an inability to sleep. [00:58.40]These problems can exist for a long time. [01:03.52]Some concussion patients have experienced loss of memory, [01:09.08]trouble thinking and feelings of anxiety. [01:13.76]Doctors at Orlando Health System in Florida [01:18.60]developed the new blood test. [01:22.00]It shows if a biomarker is present in a person's blood. [01:28.24]The biomarker is called glial fibrillary acidic protein, or GFAP. [01:36.72]The protein is only found in the brain and nervous system [01:42.32]after a person suffers a concussion. [01:46.68]Researchers examined the blood of 600 patients. [01:51.64]They found the biomarker in the blood of those who had suffered a head injury. [01:57.72]Concussion is a common injury in contact sports. [02:03.84]A blood test soon after a head injury [02:07.84]could show if an athlete has suffered a concussion. [02:12.32]Without the test, sports team officials may not know whether the player has a concussion [02:21.56]and could return him or her to the game. [02:25.68]I'm Christopher Jones-Cruise. [02:28.80]更多听力请访问51VOA.COM