Neural plasticity and the Kennard principle: Does it work for the preterm brain?

Area of Science:

• Neuroscience
• Developmental Biology
• Pediatrics

Background:

• The Kennard principle posits greater recovery potential in immature brains.
• Preterm infants exhibit high rates of neurodevelopmental handicaps despite reduced acute brain structural damage.
• Historical cohorts showed necrotic white matter injury with axonal loss, contrasting with current diffuse gliosis and minimal axonal damage.

Purpose of the Study:

• To review evidence linking preterm birth disabilities to disturbed neuronal connection development.
• To explore potential mechanisms underlying impaired brain development post-preterm birth.
• To identify key areas for future basic science and clinical research.

Main Methods:

• Review of recent scientific literature and evidence.
• Analysis of mechanisms affecting neuronal development and connectivity.
• Examination of factors contributing to neurodevelopmental handicaps in preterm infants.

Main Results:

• Disability in preterm infants is primarily mediated by disturbed development of neuronal connections.
• Impaired white matter maturation, suboptimal neuronal maturation, and altered cellular environments are key factors.
• Clinical therapies and physiological processes like apoptosis and progenitor cell dynamics also play a role.

Conclusions:

• Insults during the critical preterm phase significantly alter brain development trajectories.
• Understanding neuronal connectivity is crucial for addressing preterm birth-related disabilities.
• Further research should focus on triggers of cell death and developmental alterations.