When the pedicles are short (commonly a genetic cause), the exiting nerves can be compressed due to the narrowed opening. This is called foraminal spinal stenosis. This compression usually occurs later in life when osteoarthritis and/or degenerative disk disease further crowds these “foramen” where the nerves exit the spine. Similarly, short pedicles can narrow the “central canal” where the spinal cord travels up and down the spine from the brain. Later in life, the combined effects of the narrow canal plus disk bulging, osteoarthritic spurs, and/or thickening or calcification of ligaments can add up to “central spinal stenosis.” The symptoms associated with spinal stenosis (whether it’s foraminal or central) include difficulty walking due to a gradual increase in tingling, heavy, crampy, achy and/or sore feeling in one or both legs. The tingling in the legs associated with spinal stenosis is called “neurogenic claudication” and must be differentiated from “vascular claudication”, which feels similar but is caused from lack of blood flow to the leg(s) as opposed to nerve flow.
At a younger age, tingling in the legs can be caused by either a bulging or herniated lumbar disk or it can be referred pain from a joint – usually a facet or sacroiliac joint. The main difference in symptoms between nerve vs. joint leg tingling symptoms is that nerve pinching from a deranged disk is located in a specific area in the leg such as the inside or outside of the foot. In other words, the tingling can be traced fairly specifically in the leg. Tingling from a joint is often described as a deep, “inside the leg,” generalized achy-tingling that can affect the whole leg and/or foot or it may stop at the knee, but it’s more difficult to describe by the patient as it’s less geographic or specific in its location. Chiropractic management of all these conditions offers a non-invasive, effective form of non-surgical, non-drug care and is the recommended in LBP guidelines as an option when treating these conditions.
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