[Vascularization of the insular cortex and claustrum in human development]

Area of Science:

• Neuroanatomy
• Vascular Biology
• Developmental Neuroscience

Context:

• The insular cortex and claustrum are critical brain structures with complex vascular networks.
• Understanding their vascular development is key to comprehending brain maturation and potential pathologies.

Purpose:

• To investigate the developmental trajectory of arterial and venous vessels in the human insular cortex and claustrum from fetal to adult stages.
• To characterize the types and distribution of vessels at different gestational ages (16-25 weeks) and in adulthood.

Summary:

• Fetal brains (16-25 weeks) showed developing arterial types (A6-A1) and venous types (V5-V4) in the insular cortex.
• By 24 weeks, all arterial types (A6-A1) were present, but only V4 veins were observed in the insular cortex until 25 weeks.
• Adult insular cortices had all vessel types but with greater inter-vessel distances compared to fetuses.
• The claustrum's vascularization shifted from primarily insular arteries in fetuses to include striate arteries in adults.

Impact:

• The observed vascular patterns suggest a potential common developmental origin for the insular cortex and claustrum.
• Provides a detailed reference for fetal brain vascular anatomy, crucial for developmental studies and clinical applications.
• Highlights differences in vascular architecture between fetal and adult brains, informing our understanding of brain aging and disease.