Lenticulostriate Artery
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Strokes
- Anterior Cerebral Artery (ACA)
- Middle Cerebral Artery (MCA)
- Posterior Cerebral Artery (PCA)
- Lenticulostriate Artery
- Anterior Inferior Cerebellar Artery (AICA)
- Posterior Inferior Cerebellar Artery (PICA)
- Anterior Spinal Artery (ASA)
- Basilar Artery
Lenticulostriate Artery
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Summary
The Lenticulostriate arteries are small vessels that supply the deep structures of the brain, notably including the striatum of the basal ganglia and the internal capsule. Strokes to this area usually occur due to small lacunar infarcts in the vessels, which commonly arise due to unmanaged hypertension. Patients classically present with either pure motor loss or pure sensory loss, but usually not both at the same time. These deficits occur on the contralateral side of the brain lesion.
Key Points
- Lenticulostriate Artery
- Also known as the penetrating branches of MCA
- Area of lesion
- Striatum (basal ganglia)
- Internal capsule
- Common location for lacunar infarcts
- Due to microatheroma + hyaline atherosclerosis (lipohyalinosis)
- Usually secondary to unmanaged HTN
- Presentation
- Pure unilateral motor loss (hemiparesis) OR sensory loss (hemisensory loss)
- Contralateral
- Pure refers to hyper-localization of lesion
- Absence of cortical signs
- No neglect, aphasia, visual field loss
- Pure unilateral motor loss (hemiparesis) OR sensory loss (hemisensory loss)