Left motor and sensory impairment with involvement of cortical regions supplied by ACA-MCA territory is most consistent with which stroke pattern?

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Multiple Choice

Left motor and sensory impairment with involvement of cortical regions supplied by ACA-MCA territory is most consistent with which stroke pattern?

A stroke pattern that produces motor and sensory deficits on the opposite side of the body with cortical involvement in the ACA–MCA territory points to a lesion in the border between the anterior and middle cerebral arteries on the opposite hemisphere. Since the deficits are on the left, the lesion must be in the right hemisphere. Therefore, the pattern is a right ACA-MCA stroke. The ACA-MCA border territory affects areas supplied by both arteries, including regions controlling proximal limb movement and cortical sensory processing. Damage here typically yields contralateral, primarily proximal motor and sensory deficits with cortical signs. A left ACA-MCA stroke would cause right-sided deficits, which doesn’t match the left-sided presentation. A right MCA–PCA pattern involves different territories (more lateral/posterior functions) and is less consistent with the described cortical ACA–MCA involvement. Thalamic syndrome involves deep structures and usually presents with pure sensory loss or sensory ataxia, not the cortical motor/sensory pattern described.

A stroke pattern that produces motor and sensory deficits on the opposite side of the body with cortical involvement in the ACA–MCA territory points to a lesion in the border between the anterior and middle cerebral arteries on the opposite hemisphere. Since the deficits are on the left, the lesion must be in the right hemisphere. Therefore, the pattern is a right ACA-MCA stroke.

The ACA-MCA border territory affects areas supplied by both arteries, including regions controlling proximal limb movement and cortical sensory processing. Damage here typically yields contralateral, primarily proximal motor and sensory deficits with cortical signs. A left ACA-MCA stroke would cause right-sided deficits, which doesn’t match the left-sided presentation. A right MCA–PCA pattern involves different territories (more lateral/posterior functions) and is less consistent with the described cortical ACA–MCA involvement. Thalamic syndrome involves deep structures and usually presents with pure sensory loss or sensory ataxia, not the cortical motor/sensory pattern described.

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