Cortical plasticity within and across lifetimes: how can development inform us about phenotypic transformations?

Area of Science:

• Neuroscience
• Evolutionary Biology
• Developmental Biology

Background:

• The neocortex is crucial for perception, cognition, and motor control in mammals.
• Neocortical structure and function exhibit significant plasticity within an individual's lifetime and across evolutionary lineages.
• Variations in neocortical phenotypes correlate with diverse species-specific behaviors.

Purpose of the Study:

• To investigate how neocortical phenotypes change during an individual's development and evolve across species.
• To understand the mechanisms underlying these phenotypic transitions.
• To explore the constraints and evolutionary pathways of neocortical development.

Main Methods:

• Comparative analysis of neocortical structures across different mammalian taxa.
• Developmental studies examining alterations in genetic and environmental factors.
• Investigating the interplay between genes, sensory environment, and physical laws in shaping the neocortex.

Main Results:

• Comparative studies reveal conserved and divergent features in neocortical organization.
• Developmental studies highlight the role of altered cascades and environmental influences on cortical phenotypes.
• Similar phenotypic traits, like cortical field size, can arise through various genetic and environmental modifications.

Conclusions:

• Neocortical evolution is shaped by both genetic predispositions and environmental interactions.
• Mammals possess mechanisms to adapt and modify their neocortical evolution, loosening physical and genetic constraints.
• Understanding these evolutionary dynamics provides insight into the diversity of mammalian cognition and behavior.