The highly elastic fibrocarti laginous envelope about each intervertebral disk. A tear of this membrane and dislodging of the inner cartilage leads to extrusion of the nucleus pulposus of the disk.
This is the peripheral portion of the intervertebral disc, consisting of collagen fibres arranged in a highly ordered pattern. The posterior fibres of the collagen lamellae are thinner and more tightly packed, hence the posterior aspect of the annulus fibrosis is thinner than the rest of the annulus.
Tough fibrous outer casting of the intervertebral disc that holds the nucleus pulposus in place.
tough fibrous ring around the disc.
The outer portion of the intervertebral disc, made of layers of collagen fibers that lie in circumferential layers around the nucleus pulposus.
The outer covering of the softer, gel-like nucleus pulposus of the intervertebral disc. The intervertebral discs are located between each of the v ertebrae of the spine.
Cartilage-like material formed in a series of rings surrounding the nucleus pulposus (soft center) of a disc.
The outer, fibrous, ring-like portion of an intervertebral disc that contains the Nucleus Pulposus (semi-gelatinous portion of the disc) . The annulus fibrosis is constructed of several fairly strong 'bands' or 'rings' of tissue, with the outmost rings containing many nerves. It is for this reason that damage to these outmost rings can be a source of pain by itself. Some people have equated the annulus fibrosis to the 'radial tire' portion of the disc.
The tough, outer portion of the disc composed of multiple cartilaginous rings. These rings firmly attach to the vertebrae above and below the disc and help to hold these segments together. Approximately 70 percent of the total disc is composed of the annulus fibrosis. Although this structure is cut through during surgery involving a discectomy, it is not removed during the procedure.