The Level of Conus Medullaris in 629 Healthy Japanese Individuals
The conus medullaris typically terminates at the L1 level; however, variations in its level and the factors associated with the conus medullaris level are unclear. We investigated the level of conus medullaris on magnetic resonance imaging in healthy volunteers. In total, 629 healthy adult volunteer...
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MDPI AG
2021-07-01
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| Series: | Journal of Clinical Medicine |
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| Online Access: | https://www.mdpi.com/2077-0383/10/14/3182 |
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| author | Hiroaki Nakashima Keigo Ito Yoshito Katayama Mikito Tsushima Kei Ando Kazuyoshi Kobayashi Masaaki Machino Sadayuki Ito Hiroyuki Koshimizu Naoki Segi Hiroyuki Tomita Shiro Imagama |
| author_facet | Hiroaki Nakashima Keigo Ito Yoshito Katayama Mikito Tsushima Kei Ando Kazuyoshi Kobayashi Masaaki Machino Sadayuki Ito Hiroyuki Koshimizu Naoki Segi Hiroyuki Tomita Shiro Imagama |
| author_sort | Hiroaki Nakashima |
| collection | DOAJ |
| description | The conus medullaris typically terminates at the L1 level; however, variations in its level and the factors associated with the conus medullaris level are unclear. We investigated the level of conus medullaris on magnetic resonance imaging in healthy volunteers. In total, 629 healthy adult volunteers (≥50 individuals of each sex and in each decade of age from 20 to 70) were enrolled. The level of the conus medullaris was assessed based on the T2-weighted sagittal magnetic resonance images, and factors affecting its level were investigated employing multivariate regression analysis including the participants’ background and radiographical parameters. L1 was the most common conus medullaris level. Participant height was significantly shorter in the caudally placed conus medullaris (<i>p</i> = 0.013). With respect to the radiographical parameters, pelvic incidence (<i>p</i> = 0.003), and pelvic tilt (<i>p</i> = 0.03) were significantly smaller in participants with a caudally placed conus medullaris. Multiple regression analysis showed that the pelvic incidence (<i>p</i> < 0.0001) and height (<i>p</i> < 0.0001) were significant factors affecting the conus medullaris level. These results indicated that the length of the spinal cord varies little among individuals and that skeletal differences affect the level of the conus medullaris. |
| first_indexed | 2024-03-10T09:35:37Z |
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| issn | 2077-0383 |
| language | English |
| last_indexed | 2024-03-10T09:35:37Z |
| publishDate | 2021-07-01 |
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| record_format | Article |
| series | Journal of Clinical Medicine |
| spelling | doaj.art-b32f97e83b38476d85974062c3b79bc02023-11-22T04:07:58ZengMDPI AGJournal of Clinical Medicine2077-03832021-07-011014318210.3390/jcm10143182The Level of Conus Medullaris in 629 Healthy Japanese IndividualsHiroaki Nakashima0Keigo Ito1Yoshito Katayama2Mikito Tsushima3Kei Ando4Kazuyoshi Kobayashi5Masaaki Machino6Sadayuki Ito7Hiroyuki Koshimizu8Naoki Segi9Hiroyuki Tomita10Shiro Imagama11Department of Orthopaedic Surgery, Nagoya University Graduate School of Medicine, Nagoya 466-8560, JapanDepartment of Orthopedic Surgery, Chubu Rosai Hospital, 1-10-6 Komei, Minato-ku, Nagoya 455-8530, JapanDepartment of Orthopedic Surgery, Chubu Rosai Hospital, 1-10-6 Komei, Minato-ku, Nagoya 455-8530, JapanDepartment of Orthopedic Surgery, Chubu Rosai Hospital, 1-10-6 Komei, Minato-ku, Nagoya 455-8530, JapanDepartment of Orthopaedic Surgery, Nagoya University Graduate School of Medicine, Nagoya 466-8560, JapanDepartment of Orthopaedic Surgery, Nagoya University Graduate School of Medicine, Nagoya 466-8560, JapanDepartment of Orthopaedic Surgery, Nagoya University Graduate School of Medicine, Nagoya 466-8560, JapanDepartment of Orthopaedic Surgery, Nagoya University Graduate School of Medicine, Nagoya 466-8560, JapanDepartment of Orthopaedic Surgery, Nagoya University Graduate School of Medicine, Nagoya 466-8560, JapanDepartment of Orthopaedic Surgery, Nagoya University Graduate School of Medicine, Nagoya 466-8560, JapanDepartment of Orthopaedic Surgery, Nagoya University Graduate School of Medicine, Nagoya 466-8560, JapanDepartment of Orthopaedic Surgery, Nagoya University Graduate School of Medicine, Nagoya 466-8560, JapanThe conus medullaris typically terminates at the L1 level; however, variations in its level and the factors associated with the conus medullaris level are unclear. We investigated the level of conus medullaris on magnetic resonance imaging in healthy volunteers. In total, 629 healthy adult volunteers (≥50 individuals of each sex and in each decade of age from 20 to 70) were enrolled. The level of the conus medullaris was assessed based on the T2-weighted sagittal magnetic resonance images, and factors affecting its level were investigated employing multivariate regression analysis including the participants’ background and radiographical parameters. L1 was the most common conus medullaris level. Participant height was significantly shorter in the caudally placed conus medullaris (<i>p</i> = 0.013). With respect to the radiographical parameters, pelvic incidence (<i>p</i> = 0.003), and pelvic tilt (<i>p</i> = 0.03) were significantly smaller in participants with a caudally placed conus medullaris. Multiple regression analysis showed that the pelvic incidence (<i>p</i> < 0.0001) and height (<i>p</i> < 0.0001) were significant factors affecting the conus medullaris level. These results indicated that the length of the spinal cord varies little among individuals and that skeletal differences affect the level of the conus medullaris.https://www.mdpi.com/2077-0383/10/14/3182conus medullarisheightpelvic incidencemagnetic resonance imaginghealthy volunteers |
| spellingShingle | Hiroaki Nakashima Keigo Ito Yoshito Katayama Mikito Tsushima Kei Ando Kazuyoshi Kobayashi Masaaki Machino Sadayuki Ito Hiroyuki Koshimizu Naoki Segi Hiroyuki Tomita Shiro Imagama The Level of Conus Medullaris in 629 Healthy Japanese Individuals Journal of Clinical Medicine conus medullaris height pelvic incidence magnetic resonance imaging healthy volunteers |
| title | The Level of Conus Medullaris in 629 Healthy Japanese Individuals |
| title_full | The Level of Conus Medullaris in 629 Healthy Japanese Individuals |
| title_fullStr | The Level of Conus Medullaris in 629 Healthy Japanese Individuals |
| title_full_unstemmed | The Level of Conus Medullaris in 629 Healthy Japanese Individuals |
| title_short | The Level of Conus Medullaris in 629 Healthy Japanese Individuals |
| title_sort | level of conus medullaris in 629 healthy japanese individuals |
| topic | conus medullaris height pelvic incidence magnetic resonance imaging healthy volunteers |
| url | https://www.mdpi.com/2077-0383/10/14/3182 |
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