Correlation between the Photographic Cranial Angles and Radiographic Cervical Spine Alignment

Tomoko Kawasaki, Shunsuke Ohji, Junya Aizawa, Tomoko Sakai, Kenji Hirohata, Hironobu Kuruma, Hirohisa Koseki, Atsushi Okawa and Tetsuya Jinno
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Tomoko Kawasaki: Department of Rehabilitation Medicine, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo 1138510, Japan
Shunsuke Ohji: Department of Rehabilitation Medicine, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo 1138510, Japan
Junya Aizawa: Clinical Center for Sports Medicine and Sports Dentistry, Tokyo Medical and Dental University, Tokyo 1138519, Japan
Tomoko Sakai: Department of Rehabilitation Medicine, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo 1138510, Japan
Kenji Hirohata: Department of Rehabilitation Medicine, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo 1138510, Japan
Hironobu Kuruma: Division of Physical Therapy, Tokyo Metropolitan University, Tokyo 1168551, Japan
Hirohisa Koseki: Hiro-o Orthopedics Clinic, Tokyo 1500012, Japan
Atsushi Okawa: Department of Rehabilitation Medicine, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo 1138510, Japan
Tetsuya Jinno: Department of Rehabilitation Medicine, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo 1138510, Japan

IJERPH, 2022, vol. 19, issue 10, 1-10

Abstract: The cranial vertical angle (CVA) and cranial rotation angle (CRA) are used in clinical settings because they can be measured on lateral photographs of the head and neck. We aimed to clarify the relationship between CVA and CRA photographic measurements and radiographic cervical spine alignment. Twenty-six healthy volunteers were recruited for this study. Lateral photographs and cervical spine radiographs were obtained in the sitting position. The CVA and CRA were measured using lateral photographs of the head and neck. The C2-7 sagittal vertical axis (SVA), cervical lordosis (C2-7), and occipito-C2 lordosis (O-C2) were measured using radiographic imaging as a standard method of evaluating cervical spine alignment. Correlations between the CVA and CRA on photographs and cervical spine alignment on radiographs were analyzed. The CVA and SVA were significantly negatively correlated (ρ = −0.51; p < 0.05). Significant positive correlations were found between CVA and C2-7 (ρ = 0.59; p < 0.01) and between CRA and O-C2 (ρ = 0.65; p < 0.01). Evaluating the CVA and CRA on photographs may be useful for ascertaining head and neck alignment in the mid-lower and upper parts of the sagittal plane.

Keywords: cranial vertical angle; cranial rotation angle; neck alignment; neck posture; head posture assessment; cervical alignment; spine position; vertical alignment; non-radiographic measurement; photogrammetry (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2022
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