Support from Health Force One for complex connective tissue conditions

Craniocervical instability occurs when the ligaments connecting your skull to your upper spine become too loose or damaged, allowing excessive movement between the head and neck. This can compress the spinal cord and brainstem, causing a wide range of neurological symptoms.

In people with Ehlers-Danlos Syndrome (EDS), a genetic connective tissue disorder, the ligaments throughout the body—including those in the neck—are often weaker and more stretchy than normal, making CCI more common. EDS is characterized by joint hypermobility, skin hyperextensibility, and tissue fragility.

CCI can cause a wide range of neurologic and autonomic symptoms including:

• Severe headaches, especially at the base of the skull that worsen with upright posture
• Neck pain and stiffness
• Dizziness, vertigo, and balance problems
• Tinnitus (ringing in the ears)
• Vision problems including visual disturbances and difficulty focusing
• Cognitive difficulties ("brain fog"), memory problems, and speech difficulties
• Numbness, tingling, or weakness in the arms and hands
• Difficulty swallowing (dysphagia)
• Fatigue and reduced ability to hold your head upright
• Signs of dysautonomia such as orthostatic intolerance and palpitations
• Worsening symptoms when looking down or with prolonged sitting

Diagnosis requires correlation of symptoms with imaging findings. Standard supine MRI may underestimate instability, as malalignment often manifests only under physiologic load. Specialized imaging that shows how your neck moves is essential:

• Digital Motion X-ray (DMX): Shows ligament damage and excessive movement during flexion and extension
• Upright MRI with flexion/extension: Reveals spinal cord compression and disc problems, and demonstrates dynamic instability
• Dynamic CT imaging: Can assess rotational instability and other abnormalities
• Clinical evaluation: Assessment of symptoms, postural endurance, neurological findings, and functional limitations

Multiple radiographic parameters are used to assess CCI, including the clivo-axial angle, basion-axial interval, and Grabb-Oakes measurement, though consensus regarding diagnostic thresholds remains limited.

Conservative Management:

Conservative treatment should be tried first, as craniocervical fusion should be considered the last option when non-operative treatment has failed.

• Cervical bracing: Rigid collars (like the Aspen Vista) provide external support and limit excessive neck movement
• Physical therapy: Specialized exercises to strengthen supporting muscles, improve core strength, and enhance joint stability
• Activity modification: Pacing and positioning strategies to reduce symptom flares; avoiding impact sports, prolonged sitting or driving, and using frequent rest periods
• Pain management: Medications and other therapies to manage discomfort

Managing these conditions requires a comprehensive approach:

• Use of assistive devices (braces, mobility aids, adaptive equipment)
• Careful management of other EDS-related conditions (MCAS, POTS, GI issues)
• Aquatic therapy and low-resistance exercises for gentle, supportive exercise
• Avoiding activities that worsen instability
• Building a care team familiar with connective tissue disorders
• Patient education and self-management strategies

Physical therapy and rehabilitation are recognized as indispensable components in management. Low-resistance exercises such as walking, cycling, and swimming can increase muscle tone and strength, improving joint stability. Pool and low-impact activities are preferred to high-impact activities that increase joint stress.

Sudden worsening of symptoms—especially loss of speech, inability to stand, severe dizziness, or new neurological symptoms—may indicate spinal cord compression or other serious complications. Seek immediate medical attention.