What's in a Trait? Reconceptualizing Neurodevelopmental Timing by Seizing Insights From Philosophy.

Area of Science:

• Evolutionary Biology
• Neuroscience
• Philosophy of Science

Background:

• Traditional gene-centric views often oversimplify trait determination.
• Developmental plasticity and sensitive periods are critical for understanding biological variability.
• Philosophical inquiry can clarify complex scientific concepts.

Purpose of the Study:

• To demonstrate philosophy's contribution to evolutionary biology and neuroscience.
• To explore an interactionist approach to gene-trait and neurodevelopmental concepts.
• To re-evaluate the etiology of psychopathologies through developmental timing.

Main Methods:

• Conceptual analysis integrating philosophical questions with scientific discourse.
• Application of an interactionist framework to evolutionary heterochrony and neurodevelopmental plasticity.
• Case example of human neocortex expansion and schizophrenia etiology.

Main Results:

• Genes are viewed as influencers of plastic trait development, not sole determinants.
• Heterochrony, particularly prolonged postnatal brain development, highlights human adaptability and plasticity.
• Schizophrenia is linked to prolonged neuroplasticity, "overpruning," and delayed maturation, influenced by gene-environment interactions.

Conclusions:

• An interactionist perspective challenges gene-for-trait paradigms, emphasizing developmental timing.
• Understanding sensitive periods and developmental plasticity is key to explaining biological diversity and psychopathologies.
• Focusing on developmental timing offers new avenues for understanding and intervening in neurodevelopmental disorders.