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Median sagittal section of two lumbar vertebræ and their ligaments (Intervertebral fibrocartilage labeled at center left)
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Costotransverse articulation Seen from above (Intervertebral fibrocartilage labeled at top center )
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(or '''intervertebral fibrocartilage''') lie between adjacent
Vertebrae in the
Spine . Each disc forms a cartilaginous
Joint to allow slight movement of the vertebrae, and acts as a
Ligament to hold the vertebrae together.
Discs consist of an outer '' the jelly/ nucleus pulposis is forced out of the doughnut/ disc and may put pressure on the nerve located near the disc. This will give one the symptoms of
Sciatica .
There is one disc between each pair of vertebrae, except for the first cervical segment, the ''
Atlas ''. The ''atlas'' is a ring around the roughly cone-shaped extension of the ''
Axis '' (second cervical segment). The axis acts as a post around which the atlas can rotate, allowing the neck to swivel. There are a total of twenty-three discs in the
Spine , which are identified by specifying the particular vertebrae they separate. For example, the disc between the fifth and sixth cervical vertabrae is designated "C5-6".
As people age, the ''nucleus pulposus'' begins to dehydrate, which limits its ability to absorb shock. The ''annulus fibrosus'' gets weaker with age and begins to tear. While this may not cause pain in some people, in others one or both of these may cause chronic pain.
Pain due to the inability of the dehydrating ''nucleus pulposus'' to absorb shock is called or disc space pain. One generally refers to the gradual dehydration of the ''nucleus pulposus'' as
Degenerative Disc Disease .
When the ''annulus fibrosus'' tears due to an injury or the aging process, the ''nucleus pulposus'' can begin to extrude through the tear. This is called
Disc Herniation . Near the posterior side of each disc, all along the spine, major spinal nerves extend out to different organs, tissues, extremities etc. It is very common for the herniated disc to press against these nerves (
Pinched Nerve ) causing radiating pain, numbness, tingling, and diminished strength and/or range of motion. In addition, the contact of the inner nuclear gel, which contains
Inflammatory Proteins , with a nerve can also cause significant pain. Nerve-related pain is called
Radicular Pain .
Herniated Discs go by many names and these can mean different things to different medical professionals. A slipped disc, ruptured disc, or a bulging disc can all refer to the same medical condition.
Protrusions of the disc into the adjacent vertebra are known as .
