A 56 year old male presented with hemiparesis involving the entire left side of the body except for the left leg, which is normal. Radiography revealed a stroke involving the right primary motor coex. Which of the following vessels is likely to be thrombosed?
Correct Answer: Middle cerebral aery
Description: The middle cerebral aery supplies the entire motor area except for the leg area. Thus, a lesion in the middle cerebral aery causes contralateral hemiparesis, sparing the leg area. The anterior cerebral aery is the smaller terminal branch of the internal carotid aery. It runs in the saggital fissure and is joined by the anterior communicating aery. It anastomoses with the posterior cerebral aery. It supplies the medial surface of the cerebral coex and a strip of about 1 inch on the adjoining lateral surface. It also supplies the pas of lentiform and caudate nuclei and the internal capsule. The middle cerebral aery is the larger terminal branch of the internal carotid aery. It runs in the lateral sulcus. It supplies the entire lateral surface of the cerebral hemisphere except for a narrow strip supplied by the anterior cerebral aery and the occipital pole and the inferolateral surface (supplied by the posterior cerebral aery). Therefore, the middle cerebral aery supplies the entire motor area except for the leg area. This is supplied by the anterior cerebral aery. The posterior cerebral aery is the terminal branch of the basilar aery. It supplies the occipital lobe, inferolateral and medial surfaces of the temporal lobe. Thus, it supplies the visual coex. It also supplies pas of the thalamus, lentiform nucleus, midbrain, pineal gland, and medial geniculate bodies. Ref: Snell's Clinical Neuroanatomy 8th edition Pgno: 465,468
Category:
Anatomy
Get More
Subject Mock Tests
Practice with over 200,000 questions from various medical subjects and improve your knowledge.
Attempt a mock test nowMock Exam
Take an exam with 100 random questions selected from all subjects to test your knowledge.
Coming SoonGet More
Subject Mock Tests
Try practicing mock tests with over 200,000 questions from various medical subjects.
Attempt a mock test now