{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,10]],"date-time":"2026-10-10T06:48:27Z","timestamp":1791614907543,"version":"4.3.4"},"reference-count":21,"publisher":"Wiley","issue":"8","license":[{"start":{"date-parts":[[2026,10,9]],"date-time":"2026-10-09T00:00:00Z","timestamp":1791504000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"},{"start":{"date-parts":[[2026,10,9]],"date-time":"2026-10-09T00:00:00Z","timestamp":1791504000000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Pain Practice"],"published-print":{"date-parts":[[2026,11]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Background<\/jats:title>\n                    <jats:p>Atlanto\u2010occipital (AO) joint instability and arthrosis are significant contributors to cervicogenic headaches and related disability. Injection and radiofrequency treatment of the AO joint are innovative approaches. However, the literature providing guidance on safe access to these joints remains sparse. The AO joint presents a high\u2010risk target for interventions due to its proximity to the vertebral artery (VA), potentially compromising vascular supply to the cord, brainstem, cerebellum, and occipital lobe.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Objectives<\/jats:title>\n                    <jats:p>We describe the technical details of a novel fluoroscopy\u2010guided AO joint injection and evaluate the safety using a cadaveric model.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Study Design<\/jats:title>\n                    <jats:p>Cadaveric study.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Setting<\/jats:title>\n                    <jats:p>Department of Pathology, Forensic and Insurance Medicine, Semmelweis University, Faculty of Medicine.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Method<\/jats:title>\n                    <jats:p>Ten AO joints from five prone cadavers were targeted for injection. A far posterolateral needle entry targeting the anterolateral aspect of the AO joint was employed, guided by fluoroscopy. Intra\u2010articular spread was confirmed with contrast medium. Subsequent dissections were conducted to examine the relationship between the VA and the needle trajectory and position to assess safety.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>All needles were accurately placed within the AO joints and avoided the VA and adjacent critical structures, confirming the anatomical feasibility of the technique.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Limitations<\/jats:title>\n                    <jats:p>The small sample size may not reflect the diversity of live patient anatomy. Additionally, the use of cadavers precludes assessment of physiological responses to injections, potentially limiting the direct applicability of findings to live patients.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>This study describes a reproducible fluoroscopy\u2010guided approach to the AO joint. Targeting the anterolateral aspect of the joint allowed accurate needle placement while maintaining separation from the VA and other critical structures in this cadaveric model, supporting further clinical evaluation of the technique.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1111\/papr.70201","type":"journal-article","created":{"date-parts":[[2026,10,10]],"date-time":"2026-10-10T05:50:48Z","timestamp":1791611448000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["A Novel Approach to Atlanto\u2010Occipital (\n                    <scp>AO<\/scp>\n                    ) Joint Injection: A Cadaveric Study"],"prefix":"10.1111","volume":"26","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-8045-9185","authenticated-orcid":false,"given":"Agnes","family":"Stogicza","sequence":"first","affiliation":[{"name":"Department of Anesthesia Szeged University  Szeged Hungary"},{"name":"PSI Pain Clinic  Budapest Hungary"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0006-4375-1498","authenticated-orcid":false,"given":"Hala","family":"Elhamory","sequence":"additional","affiliation":[{"name":"Department of Anesthesia Szeged University  Szeged Hungary"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Krisztina","family":"Danics","sequence":"additional","affiliation":[{"name":"Department of Pathology, Forensic and Insurance Medicine, Faculty of Medicine Semmelweis University  Budapest Hungary"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Philip","family":"Peng","sequence":"additional","affiliation":[{"name":"Department of Anesthesia and Pain Medicine Toronto Western Hospital, University of Toronto  Toronto Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2026,10,9]]},"reference":[{"key":"e_1_2_16_2_1","volume-title":"UpToDate","author":"Watson J. 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