WHAT IS A DISC?

The spine has three main sections: Cervical (neck), thoracic (mid-back), and lumbar (lower back). The letter L - refers to lumbar. A spinal disc separates each vertebral body from the other.

A L4-L5 disc, refers to the  disc that is in between the L4 and L5 vertebral body.​

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The disc absorbs compression within the spine​​ - like a shock absorber

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The disc provides flexibility

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The disc protects from excessive motion

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The spinal nerves pass right behind the discs

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