[citation needed] The name of these arteries is derived from some of the structures they supply, namely the lentiform nucleus and the striatum.

This can lead to contralateral paresis (muscular weakness) and/or sensory loss of the face and body.

[2][8][4] According to the Medical Dictionary of the French Academy of Medicine, a single thalamoperforating artery arises from the (pre-communicating (P1) segment of) the posterior cerebral artery, piercing the anterior perforated substance to reach and supply the ventral portion of the thalamus.

[4] PMCAs arise from the proximal (pre-communicating segment (P1)[9] of the posterior cerebral artery (PCA),[2][4][9] and along the entire length of[2] the posterior communicating artery[2][10][5]: 372  (though branches arising from the latter may be considered as a distinct anatomical entity[4]).

[5]: 377-378 An embolism of a single PMCA at mesencephalic levels may result in a small infarction of the mesencephalon, causing Weber's syndrome.