MRCP UK EXAMINATIONS

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NEUROLOGY

HEMIPARESIS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
  Possible occipital infarcts * Vision affected can produce homonymous hemianopsia and visual agnosias, prosopagnosia * Thalamic branches can produce thalamic pain syndrome and contralateral sensory loss ____ Thalamus transits sensory info (numbness / tingling / loss of sensation) * Contralateral hemiplegia * Possible ataxia
A
Anterior Cerebral Artery (ACA)
B
Middle Cerebral Artery (MCA)
C
Posterior Cerebral Artery (PCA)
D
None of the above
Explanation: 

Detailed explanation-1: -Homonymous hemianopsia (or homonymous hemianopia, HH) is a field loss deficit in the same halves of the visual field of each eye. This condition most commonly results from stroke for adults, or tumors/lesions for patients under the age of 18.

Detailed explanation-2: -Homonymous hemianopsia, in conjunction with an afferent pupillary defect, localizes the lesion to the optic tract. [2] Homonymous hemianopsia with macular sparing suggests damage to the primary visual cortex.

Detailed explanation-3: -Homonymous hemianopia is a visual field defect involving either the two right or the two left halves of the visual fields of both eyes.

Detailed explanation-4: -Homonymous hemianopia (HH) involves vision loss on the same side of the visual field in both eyes. This type of visual field loss is indicative of a lesion involving the visual pathway posterior to the chiasm.

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