AA joint injections are indicated for:
The lateral AA joint is a common cause of cervicogenic headache and may account for up to 16% of patients with occipital headache.1 The AA joint primarily refers to the occipito-cervical region, radiating to the posterior auricular region.2 There may be decreased range of motion, crepitance, and abnormal head position. When pain is increased at far cervical rotation, either during protraction or retraction, the AA joint is likely to be responsible. Unfortunately, the radiologic diagnosis of AA joint pathology has a high false-negative result, since onset of pain precedes any observable structural abnormalities. Characteristic referred pain patterns from AA and AO joint pathology overlap those patterns from the greater and lesser occipital nerves as well as the pain from the C2/C3 facet joint,2 making clinical diagnosis difficult.