Inclusion Criteria:  All patients enrolled at the University Hospital of Umeå who have undergone ACSS between C2 and Th1 level due to trauma are eligible participants in the first part of the study. Eligibility criteria to participate in part 2 is swallowing dysfunction on FEES at 4±1-week post-operation  Exclusion Criteria:  Patients <18 years of age known dysphagia prior to the trauma/injury affected brainstem that is shown on a CT or MRI severe brain damage.