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Related Experiment Videos

Proximal cervical spinal nerve: MR appearance.

D P Yug1, V M Haughton, L A Sether

  • 1Department of Radiology, Medical College of Wisconsin, Froedtert Memorial Lutheran Hospital, Milwaukee 53226.

Radiology
|August 1, 1992
PubMed
Summary
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Magnetic resonance imaging (MRI) reveals distinct features of cervical spinal nerves. The study identifies an interradicular cleft and nerve fascicles, explaining variable appearances on MR images.

Area of Science:

  • Anatomy
  • Radiology
  • Neuroscience

Background:

  • Recent descriptions highlight an interradicular cleft and nerve fascicles within the cervical spinal nerve.
  • The precise appearance of these structures on magnetic resonance (MR) imaging remains to be fully elucidated.

Purpose of the Study:

  • To determine if nerve fascicles and the interradicular cleft have a distinctive appearance on MR images.
  • To provide an anatomical explanation for the variable MR imaging findings of cervical spinal nerves.

Main Methods:

  • Cadaveric C-4 and C-8 spinal nerves and nerve roots were dissected, imaged with MR, sectioned, and stained.
  • Cervical neural foramina were imaged with MR and subsequently sectioned.

Main Results:

Related Experiment Videos

  • MR imaging demonstrated that root sheaths divide into ventral and dorsal portions, separated by fat within the interradicular cleft, proximal to the dorsal root ganglion.
  • Distal to the dorsal root ganglion, the cervical spinal nerve's proximal portion, containing multiple fascicles, appeared inhomogeneous on MR images.

Conclusions:

  • The interradicular cleft and nerve fascicles present a distinctive appearance on MR imaging.
  • These anatomical findings offer an explanation for the observed variability in cervical spinal nerve MR imaging.