A structural MRI study of human brain development from birth to 2 years

Area of Science:

• Neuroscience
• Developmental Biology
• Pediatric Imaging

Background:

• Early brain development is critical for neurodevelopmental outcomes.
• Limited knowledge exists regarding structural brain changes in the first two years of life.
• This period is vital for understanding disorders like autism and schizophrenia.

Purpose of the Study:

• To investigate structural brain development in healthy infants from birth to two years of age.
• To quantify changes in total brain volume, gray matter, white matter, cerebellum, lateral ventricles, caudate, and hippocampus.
• To provide insights into the structural basis of early cognitive and motor development.

Main Methods:

• Structural magnetic resonance imaging (MRI) scans were acquired from 98 healthy children.
• Scans included T1-weighted and T2-weighted sequences.
• Automated tissue segmentation and volumetric analysis were performed.

Main Results:

• Total brain volume increased by 101% in the first year and 15% in the second year.
• Gray matter volume increased by 149% in the first year, while white matter volume increased by only 11%.
• Cerebellum volume increased by 240% in the first year; lateral ventricle volume increased by 280%.

Conclusions:

• The human brain exhibits robust structural growth in the first two years, predominantly driven by gray matter expansion.
• Slower white matter growth and significant cerebellar development characterize this period.
• Findings offer insights into the structural foundations of early development and neurodevelopmental disorder pathogenesis.