annulus fibrosus

(noun)

Fibrous ring of intervertebral disk.

Related Terms

  • symphysis
  • nucleus pulposus
  • intervertebral disc
  • sciatica

Examples of annulus fibrosus in the following topics:

  • Sciatic Nerve Injury

    • The intervertebral discs consist of an annulus fibrosus, which forms a ring surrounding the inner nucleus pulposus.
    • When there is a tear in the annulus fibrosus, the nucleus pulposus (pulp) may extrude through the tear and press against spinal nerves within the spinal cord, cauda equina, or exiting nerve roots, causing inflammation, numbness, or excruciating pain.
  • Cartilaginous Joints: Symphyses

    • The discs consist of an outer annulus fibrosus that surrounds the inner nucleus pulposus.
    • The annulus fibrosus and the nucleus pulposus distribute pressure evenly across the disc.
    • The disc can be likened to a jelly doughnut with the annulus fibrosis as the dough and the nucleus pulposis as the jelly.
  • Structure, Type, and Location of Cartilage

    • Fibrocartilage is found in the pubic symphysis, the annulus fibrosus of intervertebral discs, menisci, and the temporal mandibular joint.
  • Ascending Aorta

    • The aortic root is the portion of the ascending aorta beginning at the aortic annulus, the fibrous attachment between the heart and the aorta, and extending to the sinotubular junction.
  • Operation of Atrioventricular Valves

    • The mitral annulus, a ring around the mitral valve, changes in shape and size during the cardiac cycle to prevent backflow.
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