![]() A neurologist is a doctor with specialized training in diagnosing, treating and managing disorders of the brain and nervous system such as Alzheimer's disease, stroke, migraine, multiple sclerosis, concussion, Parkinson's disease and epilepsy.įor more information about the American Academy of Neurology, visit AAN.com ![]() The AAN is dedicated to promoting the highest quality patient-centered neurologic care. The American Academy of Neurology is the world's largest association of neurologists and neuroscience professionals, with 40,000 members. “High metabolic rates leading to a relative insufficiency of blood flow in the hippocampus could be the natural history of transient global amnesia.” “Emotional arousal has been suggested to lead to metabolic disturbances,” said Sedlaczek. One potential area to continue study is metabolic rate, noted Sedlaczek. “Using this study as a stepping stone, perhaps we can further clarify the mechanism of this condition by combining these findings with perfusion weighted MRI, functional neuroimaging such as PET or SPECT, and possibly venography,” said Tong. Tong, MD, of Stanford University School of Medicine in Stanford, Calif., who wrote an editorial in the same issue of Neurology. Antiplatelet therapy could be considered in those with vascular risk factors such as arteriosclerosis, commented David C. The study results could influence treatment of individuals with transient global amnesia. The delayed detectability of lesions may explain the incongruence of previous studies in this condition.” “Our study confirms the involvement of hippocampal lesions in transient global amnesia. Sedlaczek, MD, of the Department of Neurology at University of Heidelberg in Mannheim, Germany. “Lesions were rarely noted during the period of amnesia, but with follow-up MRI, they became visible by 48 hours,” said study author Oliver L. Lesions from TIA typically appear larger in size and without delay, in contrast to lesions associated with transient global amnesia. None of the patients studied had recent history of head injury or seizures.ĭespite some similarities, transient global amnesia isn’t the same as a transient ischemic attack (TIA). This amnesia often occurs following a stressful, emotional situation, and usually lasts less than 24 hours. Transient global amnesia is characterized by a sudden inability to form new memories or recall the near past. In two of the five patients without lesions, the MRI was done after 96 and 120 hours. All lesions were located in the hippocampus, an area of the brain which plays an important role in memory functions. After 24 hours, small lesions (areas of brain damage) appeared on the MRI for 23 patients, and after 48 hours, lesions appeared for three more patients. In a new approach, the patients underwent two follow-up MRI studies over the next two days. Using diffusion weighted imaging, a type of MRI, a team in Germany examined 31 patients within hours of the onset of amnesia. The study showed lesions didn’t appear immediately in the patients’ brains, but developed one to two days after an episode of transient global amnesia. Researchers have new insights into a mysterious type of amnesia, according to a study published in the June 22 issue of Neurology, the scientific journal of the American Academy of Neurology. ![]() Home Press Room Archives Press Release EMBARGOED FOR RELEASE UNTIL 4 PM ET, JAfter Amnesia, Brain Lesions Appear By continuing to use our site, you consent to the use of these cookies. Some are essential to make our site work properly, others perform functions more fully described in our Privacy Policy. Thank you for your patience.īy continuing to use our site, you agree to the Terms of Use and acknowledge that you’ve read our Privacy Policy. We’re experiencing unusually high levels of traffic. The latest research and news affecting neurology.A network of 40,000+ neurologists and neuroscience professionals.Guidelines and publications including Neurology® journal.Discounts on Annual Meeting registration.Online education resources at no additional cost.Become a Memberīy becoming a member of the AAN, you can receive exclusive information to help you at every stage of your career. Log In Email or 6-digit member ID Password Remember me Forgot Password? Log In Get tools and information for your specific career stage and professional needs.
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