Persisting neck pain and headache is a common complication of acceleration/deceleration injury. Seventy patients with normal imaging studies and persisting pain after injury (median 1.7 y), who had failed all usual conservative forms of care were offered a diagnostic block protocol to determine the origins of the persisting pain. Blocks included C-2-3 roots bilaterally; C-2-3-4 zygapophyseal joints, and provocative discography at C-3-4, 4-5, 5-6, 6-7. Seventy patients entered the study; 67 completed the block protocol. On the basis of response to blocks, 44 patient were chosen for posterior cervical fusion of C-l, 2, 3, 4 in several combinations. Seventy-nine percent of patients achieved complete pain relief; 14% received satisfactory pain relief; fusion was achieved in 95%. These data support the hypothesis of Bogduk and associates that upper cervical facet injury is a common consequence of acceleration/deceleration accidents. The symptoms can be relieved by upper cervical fusion in some patients selected by concordant blocks.