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The intersegmental anastomoses between spinal nerve roots.

J Moriishi1, K Otani, K Tanaka

  • 1Department of Orthopaedic Surgery, School of Medicine, Chiba University, Japan.

The Anatomical Record
|May 1, 1989
PubMed
Summary
This summary is machine-generated.

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Intersegmental spinal root anastomoses vary by region and type. Dorsal roots show higher frequencies, particularly in the cervical region, with Type A being most common.

Area of Science:

  • Neuroscience
  • Anatomy

Background:

  • Spinal roots form crucial connections within the central nervous system.
  • Understanding the variations in spinal root anatomy is essential for neurological studies.

Purpose of the Study:

  • To investigate the frequency and morphological characteristics of intersegmental anastomoses between spinal roots.
  • To classify and analyze different types of these anastomoses across spinal cord segments.

Main Methods:

  • Examination of 100 adult spinal cords from cervical to lumbar segments.
  • Classification of anastomoses into four types (A, B, C, D) based on their morphological characteristics and relationship to spinal segments.

Main Results:

  • Dorsal root anastomoses were most frequent in the cervical (61%) and lumbar (22%) regions, with significantly lower incidence in ventral roots.

Related Experiment Videos

  • Type A anastomoses were most common in dorsal roots, while Types C and D predominated in cervical ventral roots.
  • Specific patterns were observed, with Type C increasing in lumbar dorsal roots towards the sacral level and Type D being exclusive to cervical segments.

    • Conclusions:

    • Significant regional and type-specific variations exist in intersegmental spinal root anastomoses.
    • These findings contribute to a detailed anatomical understanding of spinal cord connectivity.