Abstract
The hippocampal formation plays an important role in learning and memory; however, data on its development in utero in humans are limited. This study was performed to evaluate hippocampal development in healthy fetuses using 3D reconstructed MRI. A cohort of 20 healthy pregnant women underwent prenatal MRI at a median GA of 24.9 wk (range, 21.3–31.9 wk); six of the women also had a second fetal MRI performed at a 6-wk interval. Routine 2D ultrafast T2-weighted images were used to reconstruct a 3D volume image, which was then used to manually segment the right and left hippocampi. Total hippocampal volume was calculated for each subject and compared against GA. There was a linear increase in total hippocampal volume with increasing GA (p < 0.001). For subjects scanned twice, there was an increase in hippocampal size on the second fetal MRI (p = 0.0004). This represents the first volumetric study of fetal hippocampal development in vivo. This normative volumetric data will be helpful for future comparison studies of suspected developmental abnormalities of hippocampal structure and function.
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Abbreviations
- THV:
-
total hippocampal volume
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Acknowledgements
We thank Ms. Addison Cuneo for her logistical help, and the volunteers who participated in this study.
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Supported by grants by the National Institutes of Health K23 NS 52506 [to O.A.G.] and R01 NS 055064 [to C.S.].
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Jacob, F., Habas, P., Kim, K. et al. Fetal Hippocampal Development: Analysis by Magnetic Resonance Imaging Volumetry. Pediatr Res 69, 425–429 (2011). https://doi.org/10.1203/PDR.0b013e318211dd7f
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DOI: https://doi.org/10.1203/PDR.0b013e318211dd7f
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