Anterolateral central arteries
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Through Claustrum
The name of these arteries is derived from some of the structures they supply, namely the lentiform nucleus and the striatum.
Anatomy
Distribution
The ALCAs supply the:
- posterior portion of the striatum
- putamen
- (head of) caudate nucleus
- (lateral portion of) globus pallidus
- (all parts of) internal capsule (anterior limb, genu, and - a portion of - posterior limb)
- claustrum
- external capsule
The medial striate artery (Recurrent artery of Heubner) arises either from the middle cerebral artery or anterior cerebral artery, and supplies the rostral/anterior portion of the caudate nucleus and putamen, and the anterior limb and genu of internal capsule.
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Clinical significance
Blockage of the lenticulostriate arteries causes lacunar infarcts. These infarcts are most often due to hyaline arteriosclerosis secondary to hypertension. This can lead to contralateral paresis (muscular weakness) and/or sensory loss of the face and body.