Evaluation of advances in cortical development using model systems.

Area of Science:

• Neuroscience
• Developmental Biology
• Genetics

Background:

• The human cortex exhibits significant specialization and expansion during development compared to other primates.
• While mammalian cortical development shares core principles, human and primate brains possess unique features like novel cell types and distinct architecture.
• Genes and pathways driving human-specific cortical expansion are also linked to neurodevelopmental and neuropsychiatric disorders when misregulated.

Purpose of the Study:

• To review key stages of cortical development.
• To highlight differences between model systems and human brain development.
• To identify developmental trajectories underlying human-specific traits and disorders.

Main Methods:

• Comparative analysis of cortical development across species.
• Review of existing literature on gene expression, cell types, and cortical architecture.
• Identification of developmental processes potentially unique to humans.

Main Results:

• Human cortical development involves unique transcription factor expression, novel cell types, and distinct architecture.
• Genes promoting human-specific cortical expansion can lead to disease vulnerability if misregulated.
• Significant challenges exist in comprehensively understanding human-specific cognition and associated diseases.

Conclusions:

• Understanding human-specific cortical development is crucial for insights into cognition and disease.
• Further research is needed to examine human developmental processes in a human context.
• Identifying unique developmental trajectories can provide translatable insights into human developmental disorders.