The thalamic supply arteries are dual supplied by the internal carotid artery system and the basilar artery system. The thalamic nodal artery originates from the internal carotid artery system and originates in the middle third of the posterior communicating artery, which is located in the anterior part of the thalamus and the anterior-inferior part of the midbrain and supplies it. The paramedian thalamic artery, the thalamic geniculate artery, and the posterior choroidal artery, originate from the basilar artery system. The paramedian thalamic artery, also known as the thalamic penetrating artery, arises from the P1 segment of the posterior cerebral artery and is distributed medially to the thalamus and midbrain. The thalamic geniculate artery arises from segment P2 of the posterior cerebral artery and is distributed lateral and superior to the thalamus, supplying the posterior limb of the lateral geniculate, posterior ventral nucleus, occipital thalamus, lateral ventral nucleus, and internal capsule. The posterior choroidal artery arises from segments P2 and P3 of the posterior cerebral artery and is distributed posteriorly to the thalamus, supplying the occipital, lateral geniculate, dorsal thalamus, third ventricle, and lateral ventricular choroid plexus of the thalamus.