한국인 신생아 뇌들보의 성별에 따른 형태차이

초록

Corpus callosum is a co mmisural fiber connecting the cerebral hemispheres. The gender difference in the size or the shape of corpus callosum is a long-standing dispute. Analysis of sexual dimorphism has been expected to provide a clue to explain sociopsychological differences. Some reported that adult female CC had more bulbous splenium and larger area considering brain size, others failed to show sexual dimorphism reported in previous studies. Only few studies were reported on sexual dimorphism during development. The 200 midsagittal ultrasonographs were obtained through the anterior fontanelle from healthy Korean neonates (100 males, 100 females). The neonates born after 38–42 weeks conception were scanned and each image was analyzed with NIH Image. The average area of total corpus callosum was 97.61 ± 21.05 (mean ± SD) mm² in males and 99.54 ± 20.82 mm² in females. Mean length of corpus callosum was 45.06 ± 4.51 mm in males and 44.46 ± 3.71 mm in females, and mean height was 14.06 ± 1.86 mm in males and 13.40 ± 1.75 mm in females. The height of the male corpus callosum was significantly higher than that of females. We could find sexual dimorphism of spatial orientation of the corpus callosum, although there was no significant gender difference in the area of the corpus callosum.

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