II. Epidemiology

  1. Most common Ischemic Stroke territory, accounting for up to 90% of Ischemic Strokes

III. Findings: Symptoms and Signs

  1. May be associated with rapid progression in Decreased Level of Consciousness
  2. Contralateral Hemiparesis or Hemiplegia (motor weakness)
  3. Contralateral hemisensory disturbance
    1. Sensory deficit of head (spares forehead) and arm, and to a lesser extent leg
  4. Aphasia occurs with left MCA lesion (dominant hemisphere)
  5. Hemineglect occurs with a right MCA lesion (non-dominant hemisphere)
    1. Denial or lack of recognition of paralyzed extremity
  6. May be associated with eye changes
    1. Conjugate Eye Deviation towards the Brain Lesion
      1. Eyes look toward lesion (contrast with Seizure, in which eyes look away from the lesion)
      2. Inability to turn eyes toward the affected side
    2. Contralateral homonymous hemianopsia (blindness in same visual field of each eye)

IV. References

  1. (2019) Neuro-Psych, CCME National Board Review Course, accessed 6/7/2019

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Related Studies

Ontology: Infarction, Middle Cerebral Artery (C0740392)

Definition (MSH) NECROSIS occurring in the MIDDLE CEREBRAL ARTERY distribution system which brings blood to the entire lateral aspects of each CEREBRAL HEMISPHERE. Clinical signs include impaired cognition; APHASIA; AGRAPHIA; weak and numbness in the face and arms, contralaterally or bilaterally depending on the infarction.
Concepts Disease or Syndrome (T047)
MSH D020244
Dutch arteria cerebri media accident, arteria cerebri media infarct, CVA, middelste hersenarterie, Herseninfarct, arteria cerebralis medialis, Infarct van de arteria cerebralis medialis, Middelste-hersenarterie-infarct
French Accident vasculaire de l'artère cérébrale moyenne, Infarctus du territoire de l'ACM, Infarctus de l'ACM, Infarctus de l'artère cérébrale moyenne, Infarctus du territoire de l'artère cérébrale moyenne
German Infarkt der Arteria cerebri media, Schlaganfall der Arteria cerebri media, A. cerebri media-Infarkt, Hirninfarkt, A. cerebri media, Infarkt, A. cerebri media, Schlaganfall, A. cerebri media
Italian Ictus dell'arteria cerebrale media, Infarto dell'arteria cerebrale media
Portuguese AVC da artéria cerebral média, Enfarte da artéria cerebral média, Embolia da Artéria Cerebral Média, Acidente Cerebrovascular da Artéria Cerebral Média, Infarto Cerebral da Artéria Cerebral Média, Infarto da Artéria Cerebral Média
Spanish Ictus de la arteria cerebral media, Infarto de la arteria cerebral media, Ataque de la Arteria Cerebral Media, Infarto Cerebral de la Arteria Cerebral Media, Infarto de la Arteria Cerebral Media
Swedish Mediainfarkt
English MCA INFARCT, MIDDLE CEREBRAL ARTERY CIRC INFARCT, MIDDLE CEREBRAL ARTERY INFARCT, INFARCT MCA, CEREBRAL INFARCT MIDDLE CEREBRAL ARTERY, stroke of middle cerebral artery (diagnosis), stroke of middle cerebral artery, Cerebral Infarction, Middle Cerebral Artery, Middle Cerebral Artery Circulation Infarction, Infarction, Middle Cerebral Artery, Middle Cerebral Artery Infarction, Middle Cerebral Artery Stroke, Stroke, Middle Cerebral Artery, MCA Infarction, Infarction, Middle Cerebral Artery [Disease/Finding], middle cerebral artery infarct, middle cerebral artery stroke, mca infarction, Middle cerebral artery infarct, Middle cerebral artery stroke
Japanese チュウダイノウドウミャクコウソク, 中大脳動脈性卒中, チュウダイノウドウミャクセイソッチュウ, 卒中-中大脳動脈, 中大脳動脈卒中, 中大脳動脈梗塞, 梗塞-中大脳動脈
Czech arteria cerebri media - infarkt, Cévní mozková přihoda s uzávěrem arteria cerebri media, Infarkt arteria cerebri media, arteria cerebri media - mrtvice
Finnish Keskimmäisen aivovaltimon alueen infarkti
Russian TSEREBRAL'NOI ARTERII SREDNEI INFARKT, TSEREBRAL'NOI ARTERII SREDNEI INFARKT TROMBOTICHESKII, MOZGA GOLOVNOGO ARTERII SREDNEI INFARKT, МОЗГА ГОЛОВНОГО АРТЕРИИ СРЕДНЕЙ ИНФАРКТ, ЦЕРЕБРАЛЬНОЙ АРТЕРИИ СРЕДНЕЙ ИНФАРКТ, ЦЕРЕБРАЛЬНОЙ АРТЕРИИ СРЕДНЕЙ ИНФАРКТ ТРОМБОТИЧЕСКИЙ
Polish Zawał regionu tętnicy mózgowej środkowej, Zawał obszaru tętnicy mózgowej środkowej
Hungarian Arteria cerebri media infarctus, Arteria cerebri media stroke
Norwegian Hjerneslag, arteria cerebri media, Infarkt i arteria cerebri media, Hjerneinfarkt, arteria cerebri media, Infarkt i midtre hjernearterie
Croatian Infarkt srednje moždane arterije