MARCH 2008

Chiropractic Effective for Cervicogenic Headache New Study Shows Significant Improvement in Number & Intensity of Headaches

A study recently published in the Journal of Manipulative and Physiological Therapeutics (JMPT),1 demonstrates that "spinal manipulation has a significant positive effect in cases of cervicogenic headache."

The study compared 53 subjects who had cervicogenic headaches in accordance with the standards of the International Headache Society (see Table 1). Approximately half of the group (on a randomized basis) received chiropractic manipulation; the other group (soft tissue) received low-level laser and deep friction massage. The care was given in six session over three weeks. Each subject was examined prior to treatment and at the five week mark. The analysis of the data was completed by a blinded observer.

While both groups improved with care, the improvement of the soft tissue group was only statistically significant for the number of headache hours per day. The manipulation group's improvements were statistically significant for all three measurement criteria:
 
Average Number of Analgesics per Day
Group
Before Care
After Care
Soft Tissue 1.0 0.7
Manipulation 1.5 0.8
 
Average Headache Hours per Day
Group
Before Care
After Care
Soft Tissue 4.0 2.4
Manipulation 5.2 2.0
 
Average Headache Intensity per Episode
Group
Before Care
After Care
Soft Tissue 41 37
Manipulation 44 28

Equally compelling was the change in the use of analgesics that each group experienced:
Use of Analgesics
Group
Decrease
Unchanged
Increase
Soft Tissue 12 5 8
Manipulation 20 6 2
 

Those receiving manipulation for their cervicogenic headache:

• Decreased their analgesic use by 36%,
• Decreased their headache hours by 69%
• Decreased their headache intensity by 36%

Table I. The 1990 criteria of the International Headache Society for the diagnosis of cervicogenic headache.2

Diagnostic Criteria for Cervicogenic Headache

A. Pain localized to neck and occipital region. May project to forehead, orbital region, temples, vertex or ears.
B. Pain is precipitated or aggravated by special neck movements or sustained neck posture.

C. At least one of the following:
1. Resistance to or limitation of passive neck movements.
2. Changes in neck muscle contour, texture, tone or response to active and passive stretching and contraction.
3. Abnormal tenderness of neck muscles.

D. Radiological examination reveals at least one of the following:
1. Movement abnormalities in flexion/extension.
2. Abnormal posture.
3. Fractures, congenital abnormalities, bone tumors, rheumatoid arthritis or other distinct pathology (not spondylosis or osteochondrosis).

Comment: Cervical headaches are associated with movement abnormalities in cervical intervertebral segments. The disorder may be located in the joints or ligaments. The abnormal movement may occur in any component of intervertebral movement, and is manifest during either active or passive examination of the movement.

Reference
1 Nilsson N, Christensen HW, Hartvigsen J. The effect of spinal manipulation in the treatment of cervicogenic headache. J Manipulative Physiol Ther 1997;20:326-30
2 Olesen J. Classification and diagnostic criteria for headache disorders, cranial neuralgias and facila pain. Copenhagen: International Headache Society, 1990.  

 
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