Question:medium
Regarding anterior choroidal artery syndrome, all are true except?
Regarding anterior choroidal artery syndrome, all are true except?
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The anterior choroidal artery supplies the posterior limb of the internal capsule, not the anterior limb.
Updated On: Jun 24, 2026
- Hemiparesis
- Hemisensory loss
- Predominant involvement of anterior limb of internal capsule
- Homonymous hemianopia
Show Solution
The Correct Option is C
Solution and Explanation
Begin with what artery the question concerns. The anterior choroidal artery arises from the internal carotid and is a small but clinically important vessel because its territory packs together motor, sensory and visual pathways in a tight space.
What does it actually feed? Its key supply is the posterior limb of the internal capsule, together with the optic tract, the lateral geniculate body and part of the medial temporal lobe. Because the posterior limb carries descending corticospinal motor fibres and ascending thalamocortical sensory fibres, and the optic pathway runs nearby, occlusion gives a recognisable triple deficit.
The triple deficit is: contralateral hemiplegia or hemiparesis from interruption of motor fibres, contralateral hemianesthesia or hemisensory loss from interruption of sensory fibres, and contralateral homonymous hemianopia from damage to the optic tract or lateral geniculate body.
Now screen the choices. Hemiparesis, hemisensory loss and homonymous hemianopia are all genuine features. The remaining option claims the anterior limb is predominantly involved, which is incorrect: the anterior choroidal artery serves the posterior limb. The anterior limb instead receives its blood from middle cerebral lenticulostriate branches and the recurrent artery of Heubner. Therefore the false statement, and the one the question asks for, is the anterior limb claim.
\[\boxed{\text{Predominant involvement of anterior limb of internal capsule}}\]
What does it actually feed? Its key supply is the posterior limb of the internal capsule, together with the optic tract, the lateral geniculate body and part of the medial temporal lobe. Because the posterior limb carries descending corticospinal motor fibres and ascending thalamocortical sensory fibres, and the optic pathway runs nearby, occlusion gives a recognisable triple deficit.
The triple deficit is: contralateral hemiplegia or hemiparesis from interruption of motor fibres, contralateral hemianesthesia or hemisensory loss from interruption of sensory fibres, and contralateral homonymous hemianopia from damage to the optic tract or lateral geniculate body.
Now screen the choices. Hemiparesis, hemisensory loss and homonymous hemianopia are all genuine features. The remaining option claims the anterior limb is predominantly involved, which is incorrect: the anterior choroidal artery serves the posterior limb. The anterior limb instead receives its blood from middle cerebral lenticulostriate branches and the recurrent artery of Heubner. Therefore the false statement, and the one the question asks for, is the anterior limb claim.
\[\boxed{\text{Predominant involvement of anterior limb of internal capsule}}\]
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