C A Hill1, P J Gibson. 1. Department of Neuroradiology, Atkinson Morley's Hospital, London, United Kingdom.
Abstract
PURPOSE: To establish the normal range of the position of the conus medullaris in neonates and determine whether it differs from that in adults. METHODS: One hundred five healthy neonates born over an 18-day period in a single obstetric unit had ultrasound examinations of their lower spines to relate the conus medullaris to the nearest intervertebral disk or midvertebral level. RESULTS: The mean position of the conus was midway between the L1-2 disk and mid-L-2 body, ranging from T-12/L-1 to L-3, with the modal position being L1-2 (47.6%). A small but significant rise in position from 33 to 42 weeks postconceptual age was identified. Comparison with data previously reported from adults showed a small but highly significant difference in conus position of approximately 0.25 vertebral levels. DISCUSSION: Our data confirm studies suggesting that ascent of the cord after birth is minor.
PURPOSE: To establish the normal range of the position of the conus medullaris in neonates and determine whether it differs from that in adults. METHODS: One hundred five healthy neonates born over an 18-day period in a single obstetric unit had ultrasound examinations of their lower spines to relate the conus medullaris to the nearest intervertebral disk or midvertebral level. RESULTS: The mean position of the conus was midway between the L1-2 disk and mid-L-2 body, ranging from T-12/L-1 to L-3, with the modal position being L1-2 (47.6%). A small but significant rise in position from 33 to 42 weeks postconceptual age was identified. Comparison with data previously reported from adults showed a small but highly significant difference in conus position of approximately 0.25 vertebral levels. DISCUSSION: Our data confirm studies suggesting that ascent of the cord after birth is minor.
Authors: F Sahin; M Selçuki; N Ecin; A Zenciroğlu; A Unlü; F Yilmaz; N Maviş; S Saribaş Journal: Arch Dis Child Fetal Neonatal Ed Date: 1997-07 Impact factor: 5.747
Authors: Lucas Costa Almeida; Yasmin Juliany de Souza Figueiredo; André Pinheiro Zylberman; Diogo Costa Garção Journal: Sci Rep Date: 2022-07-25 Impact factor: 4.996