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Case 3. A 67-year-old woman with cervical myelopathy. Left-sided open-door cervical laminoplasty at C4–6 was performed. Although there was no decrease in the wave amplitude during surgery and no muscle weakness immediately after surgery, C5 palsy on the right side (hinge side) started 2 days after surgery. The muscle power subsequently recovered to MMT 5 at 6 months after surgery. MMT indicates manual muscle testing.
