Does being born small-for-gestational-age affect cerebellar size in neonates?

Area of Science:

• Neonatal neurology
• Pediatric neuroimaging
• Fetal development

Background:

• Small for gestational age (SGA) infants often exhibit altered growth patterns.
• Cerebellar development is crucial for neurocognitive outcomes.
• Previous research has not fully elucidated cerebellar growth in SGA neonates.

Purpose of the Study:

• To assess cerebellar vermis height (CVH) and transverse cerebellar diameter (TCD) in SGA neonates.
• To compare cerebellar measurements between symmetric SGA, asymmetric SGA, and appropriate for gestational age (AGA) neonates.

Main Methods:

• 176 neonates (88 SGA, 88 AGA) aged 26-42 weeks gestation were studied.
• CVH and TCD were measured using specific ultrasound planes.
• Normal values were defined by the 10th percentile of AGA neonate nomograms.

Main Results:

• Symmetric SGA neonates showed significantly lower percentages of normal CVH and TCD compared to AGA and asymmetric SGA groups.
• Asymmetric SGA neonates also had lower percentages of normal CVH and TCD than AGA controls.
• These findings indicate reduced cerebellar growth in both SGA subgroups.

Conclusions:

• Cerebellar growth and development may be compromised in SGA neonates.
• Further research is needed to understand the long-term neurocognitive implications of altered cerebellar size in SGA infants.
• Distinguishing between symmetric and asymmetric SGA is important for assessing cerebellar development.