Bilateral thalamic infarction


The artery of Percheron is a rare anatomical variant of the posterior circulation where, instead of two parasagittal arteries, there is only one trunk arising from either of the proximal posterior cerebral arteries, supplying both thalami and rostral midbrain. Occlusion of this single artery leads to bilateral thalamic infarcts. These patients may be presented in comatose or agitated states with hemiplegia or hemisensory loss. The CT and MRI findings show bilateral thalamic infarcts sometimes with mesencephalic extension.

Authors: Aruna Pallewatte, Iddamali Kariyawasam