Narrowing in the foramina is
simplySimply sleep less room available for the nerves to pass through as they exit the spinal canal and travel to the arms or legs. The foramina is the hole where the nerve exit the spinal canal.
Most of the narrowing in adults is due to aging, wear and tear, bone spurs, disc bulges and is not typically serious enough to cause paralysis.
If you have arm pain then an epidural may be helpful and some physical therapy. If you have severe symptoms of nerve damage then surgery can be helpful.