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Assessment of Cerebral Lateralization in Children using Functional Transcranial Doppler Ultrasound fTCD

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Published on: September 27, 2010

Fetal temporal sulcus depth asymmetry has prognostic value for language development.

Lisa Bartha-Doering¹, Kathrin Kollndorfer^2,3, Ernst Schwartz⁴

¹Department of Pediatrics and Adolescent Medicine, Comprehensive Center for Pediatrics, Medical University of Vienna, Vienna, Austria. elisabeth.bartha-doering@meduniwien.ac.at.

Communications Biology

|January 27, 2023

Summary

Fetal superior temporal sulcus (STS) depth asymmetry predicts later language skills. Less rightward asymmetry in fetuses is linked to enhanced verbal abilities and left-hemisphere language dominance in children.

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Area of Science:

Neuroscience
Developmental Neuroscience
Cognitive Neuroscience

Background:

The superior temporal sulcus (STS) typically exhibits rightward depth asymmetry in humans.
This asymmetry is detectable even in the fetal brain.
Given its proximity to language-critical areas, STS asymmetry may serve as an anatomical marker for language development.

Purpose of the Study:

To investigate the predictive value of fetal STS depth asymmetry for subsequent language abilities.
To examine the relationship between fetal STS asymmetry and language localization in childhood.
To explore the potential of fetal STS asymmetry as a biomarker for neural correlates of language.

Main Methods:

Analysis of STS depth asymmetry in healthy fetal brains.
Correlation of fetal STS asymmetry with verbal abilities assessed years later (ages 6-13).
Assessment of language localization in childhood.

Main Results:

Reduced rightward lateralization of fetal STS depth was significantly associated with better verbal abilities.
Fetal STS depth asymmetry accounted for over 40% of the variance in later verbal skills.
Less rightward fetal STS depth asymmetry correlated with increased left-hemisphere language localization.

Conclusions:

Fetal STS depth asymmetry shows prognostic value for later language development and lateralization.
Findings suggest that early fetal development of the left temporal cortex and STS may favor language learning.
Fetal STS asymmetry holds potential as a diagnostic biomarker for the maturity and integrity of language-related neural structures.