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Some patients with chronic neck pain also suffer from occipital headache. They can also be disabled by dizziness, nausea, vomiting, anxiety, fatigue, insomnia, and balance difficulty [1-3]. In normal volunteers, pain from the atlanto-occipital (AO) joints can be referred to the neck and to the occipital region Therefore, the differential diagnosis of occipital pain should include the AO joints. AO joint blocks provide an objective means for diagnosing this source of pain
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Centeno et al. (2017) studied this question.
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