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Old 02-12-2012
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Hammer and Otoscope Only lower limb, upper limb OK!

A 55-year old man with hypertension has the sudden onset of weakness of the right lower extremity. The right upper extremity is not affected. The most likely cause is occlusion of which of the following arteries?

A. Anterior cerebral
B. Basilar
C. Middle cerebral
D. Posterior cerebral
E. Vertebral
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Old 02-12-2012
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A. Anterior cerebral
B. Basilar
C. Middle cerebral
D. Posterior cerebral
E. Vertebral
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Old 02-12-2012
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yup A .........
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Old 02-13-2012
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Quote:
Originally Posted by mbbs2010 View Post
A. Anterior cerebral
B. Basilar
C. Middle cerebral
D. Posterior cerebral
E. Vertebral

could you elaborate please?
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Old 02-13-2012
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A. Coz the superior part of motor cortex which supplies the lower limb is supplied by ACA
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Quote:
Originally Posted by jinni View Post
A. Coz the superior part of motor cortex which supplies the lower limb is supplied by ACA
and the upper limb is supplied by?
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Anterior cerebral artery....
As far as explanation goes the qs clearly states weakness of the limb..so u can guess well its motor homunculus thats affected.now lower limb has homunculus on the medial aspect of frontal cortex and supplied by ACA...so the answer follows.the face,head and upper limb lies in the lateral part of the frontal cortex homunculus so supplied by MCA..hope it helps
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Quote:
Originally Posted by avash.nrs View Post
Anterior cerebral artery....
As far as explanation goes the qs clearly states weakness of the limb..so u can guess well its motor homunculus thats affected.now lower limb has homunculus on the medial aspect of frontal cortex and supplied by ACA...so the answer follows.the face,head and upper limb lies in the lateral part of the frontal cortex homunculus so supplied by MCA..hope it helps
looks like i need to take a cook at this homunculus thing again lol

thanks!
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