What is Craniocervical Instability (CCI)?
Craniocervical instability is a medical condition with numerous names, including cranio-cervical instability (CCI), cranial instability, cranio-cervical syndrome, occipitoatlantialaxial hypermobility, the Syndrome of Barre Lieou, upper cervical instability, atlantoaxial instability, and others. The head is held onto the neck with strong ligaments. When these ligaments are injured or damaged or just loose due to congenital problems (like Ehler-Danlos Syndrome which can cause stretchy ligaments), the head can become unstable on the upper neck. This is called CCJ instability.
This extra motion can lead to many different issues. These include early onset arthritis in the upper neck joints. This can cause local pain in the upper neck, as well as headaches and/or dizziness and other symptoms due to spinal cord compression. In addition, the natural position sense provided by this part of the neck can become abnormal, causing other parts of the body to become misaligned and painful. Finally, there are many muscles that have tendons that can be beat up over time, leading to tendinopathy and pain.