Spectral-based thickness profiling of the corpus callosum enhances anomaly detection in fetal alcohol spectrum disorders - Aix-Marseille Université Access content directly
Journal Articles Frontiers in Neuroscience Year : 2023

Spectral-based thickness profiling of the corpus callosum enhances anomaly detection in fetal alcohol spectrum disorders

Justine Fraize
  • Function : Author
Yann Leprince
Monique Elmaleh-Bergès
  • Function : Author
Eliot Kerdreux
  • Function : Author
Richard Delorme
  • Function : Author
Lucie Hertz-Pannier
  • Function : Author
Julien Lefèvre
  • Function : Author
  • PersonId : 928951
David Germanaud
  • Function : Author

Abstract

Introduction Fetal alcohol spectrum disorders (FASD) range from fetal alcohol syndrome (FAS) to non-syndromic forms (NS-FASD). The neuroanatomical consequences of prenatal alcohol exposure are mainly the reduction in brain size, but also focal abnormalities such as those of the corpus callosum (CC). We previously showed a narrowing of the CC for brain size, using manual measurement and its usefulness to improve diagnostic certainty. Our aim was to automate these measurements of the CC and identify more recurrent abnormalities in FAS subjects, independently of brain size reduction. Methods We developed a fast, automated, and normalization-free method based on spectral analysis to generate thicknesses of the CC continuously and at singular points (genu, body, isthmus, and splenium), and its length (LCC). We applied it on midsagittal section of the CC extracted from T1-anatomical brain MRI of 89 subjects with FASD (52 FAS, 37 NS-FASD) and 126 with typically development (6–20 y-o). After adjusting for batch effect, we compared the mean profiles and thicknesses of the singular points across the 3 groups. For each parameter, we established variations with age (growth charts) and brain size in the control group (scaling charts), then identified participants with abnormal measurements (<10th percentile). Results We confirmed the slimming of the posterior half of the CC in both FASD groups, and of the genu section in the FAS group, compared to the control group. We found a significant group effect for the LCC, genu, median body, isthmus, and splenium thicknesses ( p < 0.05). We described a body hump whose morphology did not differ between groups. According to the growth charts, there was an excess of FASD subjects with abnormal LCC and isthmus, and of FAS subjects with abnormal genu and splenium. According to the scaling charts, this excess remained only for LCC, isthmus and splenium, undersized for brain size. Conclusion We characterized size-independent anomalies of the posterior part of the CC in FASD, with an automated method, confirming and extending our previous study. Our new tool brings the use of a neuroanatomical criterion including CC damage closer to clinical practice. Our results suggest that an FAS signature identified in NS-FASD, could improve diagnosis specificity.
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hal-04301155 , version 1 (22-11-2023)

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Justine Fraize, Yann Leprince, Monique Elmaleh-Bergès, Eliot Kerdreux, Richard Delorme, et al.. Spectral-based thickness profiling of the corpus callosum enhances anomaly detection in fetal alcohol spectrum disorders. Frontiers in Neuroscience, 2023, 17, ⟨10.3389/fnins.2023.1289013⟩. ⟨hal-04301155⟩
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