With the cervical spine held in full flexion, rotation is measured to each side and found to be markedly reduced to the right. This finding MOST implicates:
1The cervicothoracic junction where the lower cervical meets the upper thoracic spine
2The temporomandibular joint on the side of the restricted rotational movement noted
3The upper cervical segment between the first and second vertebrae✓ 정답
4The mid cervical segments between the fourth and fifth cervical vertebrae bilaterally
해설
완전 굴곡은 하부 경추를 잠그므로 남은 회전은 주로 환축추(C1–C2)에서 일어난다. 좌우 차이가 크면 그 분절을 시사하며 경인성 두통 평가에 쓰인다.