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The relationship between disc degeneration and morphologic changes in the intervertebral foramen of the cervical spine: a cadaveric MRI and CT study.

Sohn HM, You JW, Lee JY - J. Korean Med. Sci. (2004)

Bottom Line: The segmental angles were decreased more in advanced degenerated discs.There was a correlation between nerve root compression and decreased foraminal width and area (p<0.005).This information and critical dimensions of the intervertebral foramen for nerve root compression should help in the diagnosis of foraminal stenosis of the cervical spine in patients presenting with cervical spondylosis and radiculopathy.

View Article: PubMed Central - PubMed

Affiliation: Department of Orthopaedic Surgery, Chosun University Hospital, Gwangju, Korea. jwyou@chosun.ac.kr

ABSTRACT
A cadaveric study was performed to investigate the relationship between disc degeneration and morphological changes in the intervertebral foramen of cervical spine, including the effect on the nerve root. Seven fresh frozen human cadavers were dissected from C1 to T1, preserving the ligaments, capsules, intervertebral disc and the neural structures. The specimens were scanned with MRI and then scanned through CT scan in the upright position. Direct mid-sagittal and 45 degree oblique images were obtained to measure the dimension of the intervertebral disc height, foraminal height, width, area and segmental angles. Disc degeneration was inversely correlated with disc height. There was a significant correlation between disc degeneration and foraminal width (p<0.005) and foraminal area (p< 0.05), but not with foraminal height. Disc height was correlated with foraminal width but not with height. The segmental angles were decreased more in advanced degenerated discs. There was a correlation between nerve root compression and decreased foraminal width and area (p<0.005). This information and critical dimensions of the intervertebral foramen for nerve root compression should help in the diagnosis of foraminal stenosis of the cervical spine in patients presenting with cervical spondylosis and radiculopathy.

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Parasagittal oblique plane CT images of the cervical spine.
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Figure 2: Parasagittal oblique plane CT images of the cervical spine.

Mentions: The frozen cervical motion segments were imaged in the direct sagittal and oblique projections in a CT scanner (General Electric Medical Systems High-speed Advantage 9800; Milwaukee, WI, U.S.A.) using 120 kV, 200 mA and 1 mm slice thickness (Fig. 2). The CT gantry was oriented identically at each time. The midsagittal CT images and parasagittal oblique plane CT images in the middle of the pedicle were analyzed.


The relationship between disc degeneration and morphologic changes in the intervertebral foramen of the cervical spine: a cadaveric MRI and CT study.

Sohn HM, You JW, Lee JY - J. Korean Med. Sci. (2004)

Parasagittal oblique plane CT images of the cervical spine.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC2822244&req=5

Figure 2: Parasagittal oblique plane CT images of the cervical spine.
Mentions: The frozen cervical motion segments were imaged in the direct sagittal and oblique projections in a CT scanner (General Electric Medical Systems High-speed Advantage 9800; Milwaukee, WI, U.S.A.) using 120 kV, 200 mA and 1 mm slice thickness (Fig. 2). The CT gantry was oriented identically at each time. The midsagittal CT images and parasagittal oblique plane CT images in the middle of the pedicle were analyzed.

Bottom Line: The segmental angles were decreased more in advanced degenerated discs.There was a correlation between nerve root compression and decreased foraminal width and area (p<0.005).This information and critical dimensions of the intervertebral foramen for nerve root compression should help in the diagnosis of foraminal stenosis of the cervical spine in patients presenting with cervical spondylosis and radiculopathy.

View Article: PubMed Central - PubMed

Affiliation: Department of Orthopaedic Surgery, Chosun University Hospital, Gwangju, Korea. jwyou@chosun.ac.kr

ABSTRACT
A cadaveric study was performed to investigate the relationship between disc degeneration and morphological changes in the intervertebral foramen of cervical spine, including the effect on the nerve root. Seven fresh frozen human cadavers were dissected from C1 to T1, preserving the ligaments, capsules, intervertebral disc and the neural structures. The specimens were scanned with MRI and then scanned through CT scan in the upright position. Direct mid-sagittal and 45 degree oblique images were obtained to measure the dimension of the intervertebral disc height, foraminal height, width, area and segmental angles. Disc degeneration was inversely correlated with disc height. There was a significant correlation between disc degeneration and foraminal width (p<0.005) and foraminal area (p< 0.05), but not with foraminal height. Disc height was correlated with foraminal width but not with height. The segmental angles were decreased more in advanced degenerated discs. There was a correlation between nerve root compression and decreased foraminal width and area (p<0.005). This information and critical dimensions of the intervertebral foramen for nerve root compression should help in the diagnosis of foraminal stenosis of the cervical spine in patients presenting with cervical spondylosis and radiculopathy.

Show MeSH
Related in: MedlinePlus