Peter Sörös1, Michael Harnadek2, Treena Blake2, Vladimir Hachinski1, Richard Chan3. 1. Department of Clinical Neurological Sciences, London Health Sciences Centre, University Hospital, 339 Windermere Road, London, Ontario, N6A 5A5, Canada. 2. Department of Psychology, London Health Sciences Centre, University Hospital, 339 Windermere Road, London, Ontario, N6A 5A5, Canada. 3. Department of Clinical Neurological Sciences, London Health Sciences Centre, University Hospital, 339 Windermere Road, London, Ontario, N6A 5A5, Canada. Electronic address: Richard.Chan@lhsc.on.ca.
Abstract
BACKGROUND AND OBJECTIVE: A considerable number of patients with transient ischemic attack suffer from cognitive impairment, even after recovery of focal neurological deficits. In particular, executive functions such as working memory, abstraction, reasoning, verbal fluency and cognitive flexibility are impaired in these patients. The purpose of the present study was to explore the nature and prevalence of cognitive impairment in a series of patients with transient ischemic attack and minor stroke. MATERIALS AND METHODS: We included 140 patients (61% women) who presented with a focal cerebral ischemic event lasting less than 24h in the Urgent TIA outpatient clinic. All patients underwent a brief battery of neuropsychological tests, consisting of the Mini Mental State Examination (MMSE), Neurobehavioral Cognitive Status Examination-Judgment Subtest, Clock Drawing Test and Trail Making Test. RESULTS: A majority of patients (57%) were impaired on one or more of these neuropsychological tests. Nearly one-third of individuals were impaired on two or more tests. Cognitive impairment was most frequently observed on the Trail Making Test Part A (31% of patients) and Part B (40%). The Trail Making Test examines executive functions, as it requires cognitive flexibility, ability to maintain a complex response set and speed of processing. By contrast, only 5% of patients were impaired on the MMSE, a widely used neuropsychological test insensitive to executive dysfunction. CONCLUSIONS: Our results highlight the limitations of the MMSE as an independent cognitive screening instrument for patients with TIAs and minor stroke and the high prevalence of executive dysfunction in these patients.
BACKGROUND AND OBJECTIVE: A considerable number of patients with transient ischemic attack suffer from cognitive impairment, even after recovery of focal neurological deficits. In particular, executive functions such as working memory, abstraction, reasoning, verbal fluency and cognitive flexibility are impaired in these patients. The purpose of the present study was to explore the nature and prevalence of cognitive impairment in a series of patients with transient ischemic attack and minor stroke. MATERIALS AND METHODS: We included 140 patients (61% women) who presented with a focal cerebral ischemic event lasting less than 24h in the Urgent TIA outpatient clinic. All patients underwent a brief battery of neuropsychological tests, consisting of the Mini Mental State Examination (MMSE), Neurobehavioral Cognitive Status Examination-Judgment Subtest, Clock Drawing Test and Trail Making Test. RESULTS: A majority of patients (57%) were impaired on one or more of these neuropsychological tests. Nearly one-third of individuals were impaired on two or more tests. Cognitive impairment was most frequently observed on the Trail Making Test Part A (31% of patients) and Part B (40%). The Trail Making Test examines executive functions, as it requires cognitive flexibility, ability to maintain a complex response set and speed of processing. By contrast, only 5% of patients were impaired on the MMSE, a widely used neuropsychological test insensitive to executive dysfunction. CONCLUSIONS: Our results highlight the limitations of the MMSE as an independent cognitive screening instrument for patients with TIAs and minor stroke and the high prevalence of executive dysfunction in these patients.
Authors: Obaid Almalki; Mansour Abdullah Alshehri; Amir Abdel-Raouf El-Fiky; Ashraf Am Abdelaal; Jamal Hs Alzaidi; Wesam Saleh A Al Attar; Fatma A Hegazy Journal: J Phys Ther Sci Date: 2019-07-09
Authors: Dorien Brouwer-Goossensen; Heleen M den Hertog; Marinke A Mastenbroek-de Jong; Lisette J E W C van Gemert-Pijnen; Erik Taal Journal: Brain Behav Date: 2021-03-04 Impact factor: 2.708