Observation of the cervical segment of the spinal canal by an extension device.
D000328:Adult; D002114:Calcinosis / Q000000981:diagnostic imaging; D002574:Cervical Vertebrae / Q000002:abnormalities / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D007592:Joint Diseases / Q000000981:diagnostic imaging; D007738:Kyphosis / Q000000981:diagnostic imaging; D008023:Ligaments, Articular / Q000002:abnormalities / Q000000981:diagnostic imaging*; D008141:Lordosis / Q000000981:diagnostic imaging; D008297:Male; D008722:Methods; D008875:Middle Aged; D011187:Posture; D011859:Radiography; D013115:Spinal Canal / Q000000981:diagnostic imaging*; D013122:Spinal Diseases / Q000000981:diagnostic imaging*; D013580:Synostosis / Q000000981:diagnostic imaging