Cortical versus Pedicle Screw Stimulation Thresholds and Accuracy


About this study

The purpose of this study is to compare the stimulation threshold and accuracy of pedicle versus cortical trajectory screws

Participation eligibility

Participant eligibility includes age, gender, type and stage of disease, and previous treatments or health concerns. Guidelines differ from study to study, and identify who can or cannot participate. There is no guarantee that every individual who qualifies and wants to participate in a trial will be enrolled. Contact the study team to discuss study eligibility and potential participation.

Inclusion Criteria:

  • Retrospective Patients:
    • Past Pedicle screw stimulation patients that underwent complex spine surgery at Mayo Clinic Rochester.
  • Prospective Patients:
    • Inclusion criteria consist of adult patients that are undergoing complex spine surgery at the Mayo Clinic Rochester site.
    • Surgeries performed by Dr. Mohamed Bydon or Dr. Jeremy Fogelson in the Neurosurgery Department.
    • Patients planning to have about 500+ screws (pedicle lumbar, pedicle thoracic, cortical lumbar and cortical thoracic) within their surgery

Exclusion Criteria: 

  • Non-pedicle and non-cortical screws (i.e. lateral mass)

Participating Mayo Clinic locations

Study statuses change often. Please contact the study team for the most up-to-date information regarding possible participation.

Mayo Clinic Location Status

Rochester, Minn.

Mayo Clinic principal investigator

Mohamad Bydon, M.D.

Closed for enrollment

More information


Publications are currently not available

Study Results Summary

Not yet available

Supplemental Study Information

Not yet available


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