Inclusion Criteria:  ① patients with cervical spondylosis were definitely diagnosed; ② Cervical spine surgery was performed under general anesthesia; ③ Age ≥ 18 years old;  Exclusion Criteria:  ① patients with cervical deformity correction surgery; ② Patients who underwent secondary cervical spine surgery; ③ Patients with spinal cord injury caused by trauma (4) patients with thoracic and atlantoaxial diseases and corresponding surgery; ⑤ Ankylosing spondylitis patients; ⑥ Patients with cerebral infarction, cerebral palsy and nerve root injury.