Скачать с ютуб What does disc desiccation,bulge & wedging in MRI scan signify? - Dr. Kodlady Surendra Shetty в хорошем качестве

What does disc desiccation,bulge & wedging in MRI scan signify? - Dr. Kodlady Surendra Shetty

The spinal bone is called vertebra. In between the vertebra we have disc which is a soft material made of cartilage. It has the capacity to hold the weight. It is soft so that it can flex and bend in any direction and it is as hard as it can bear the weight also. It is because of the water content inside the disc. As repeated stress occurs on the disc the water content in the disc increases, it becomes dessicated and dries up and the disc collapses when the weight is fallen. That is why the patients with neck pain and back pain experience more pain when they are standing and the pain reduces or totally disappears when they lie down. That is because when the loading is not there the disc spreads up. When the loading occurs the disc compresses. This is called dessication. So when the disc collapses the vertical dimension decrease and the horizontal dimension increases because the volume has to be contented somewhere. It spreads out the disc and the disc presses on the thecal sac. Thecal sac contains the nerve fibres and the spinal cord. The disc intents the thecal sac. Wedging is wedge shaped vertebra. Normal vertebra is cuboidal in shape. Anterior and posterior borders are equal. When there is a pressure, when the patient suddenly falls there is a fracture and the posterior margin retains its height or length and the anterior margin decreases. It is a trapezoidal shape. Posterior border is having more height than anterior border. This is called wedging. This can happen in a single vertebra or multiple vertebrae.