Paraspinal muscles lay next to your spine. Those muscles are the primary support for the spine’s structure. Those muscles allow for flexible movement of the vertebrae and, indeed, all your body. You can injure these muscles directly with a pull or strain. You can also experience spasms after injury to other parts of the spine.
Muscle spasms mean that your muscle tissue tightens and cannot relax. Spasm is an automatic reflex to injury in any part of the spinal structure. There is a purpose for muscle spasms. When the muscle locks up, it protects the spine by reducing movement.
Muscle spasms produce excess lactic acid. The acid is a waste product resulting from chemical reactions within the muscles that are spasming. This buildup causes more pain and a burning sensation. Once the muscle is relaxed, the lactic acid washes away and allows blood to again flow more freely into the tissue.
Your Back & Spine
The Anatomy of the Spine
The Segments of the Spine
The cervical spine is the first segment of seven vertebrae at the top. It holds your head and neck.
The thoracic spine is the second segment, located in the middle portion of your body. It consists of 12 vertebrae that control the mid-back region.