{"title":"Intermittent Akinetic Mutism after Bilateral Paramedian Thalamic Infarction Caused by Artery of Percheron Occlusion:A Case Report.","authors":"Daisuke Imazato, Yuichi Kubota, Hiroki Ebise, Suguru Yokosako, Naoyuki Arai, Shinji Hagiwara, Hidenori Ohbuchi","doi":"10.2152/jmi.71.306","DOIUrl":null,"url":null,"abstract":"<p><p>Intermittent clinical course of akinetic mutism is very unusual. We describe a 74-year-old man who started to demonstrate episodes of altered mental state with stopped moving and talking, poor response to commands, and muscle stiffness in both upper limbs approximately 1.5 months after cardioembolic bilateral paramedian thalamic infarction. Their frequency gradually increased and poststroke nonconvulsive status epilepticus was suspected, but prolonged video-electroencephalography monitoring did not reveal any epileptiform abnormalities. The patient had no significant metabolic or infectious disorders. Thus, upon exclusion of other causes his condition was considered as intermittent akinetic mutism, which was indirectly confirmed by good response of symptoms to amantadine therapy and their recurrence upon termination of this treatment. J. Med. Invest. 71 : 306-309, August, 2024.</p>","PeriodicalId":46910,"journal":{"name":"JOURNAL OF MEDICAL INVESTIGATION","volume":null,"pages":null},"PeriodicalIF":0.7000,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"JOURNAL OF MEDICAL INVESTIGATION","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.2152/jmi.71.306","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"MEDICINE, RESEARCH & EXPERIMENTAL","Score":null,"Total":0}
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Abstract
Intermittent clinical course of akinetic mutism is very unusual. We describe a 74-year-old man who started to demonstrate episodes of altered mental state with stopped moving and talking, poor response to commands, and muscle stiffness in both upper limbs approximately 1.5 months after cardioembolic bilateral paramedian thalamic infarction. Their frequency gradually increased and poststroke nonconvulsive status epilepticus was suspected, but prolonged video-electroencephalography monitoring did not reveal any epileptiform abnormalities. The patient had no significant metabolic or infectious disorders. Thus, upon exclusion of other causes his condition was considered as intermittent akinetic mutism, which was indirectly confirmed by good response of symptoms to amantadine therapy and their recurrence upon termination of this treatment. J. Med. Invest. 71 : 306-309, August, 2024.
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