The Incidence of Electrophysiologically Identified Froment-Rauber Nerve in the General Population


About this study

The purpose of this study is to determine the frequency of the presence of a normal variation of a nerve in the arm in the general population.

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:

  1. Clinical history of generalized or arm symptoms
  2. No history of upper extremity mononeuropathy (e.g. carpal tunnel syndrome, ulnar neuropathy, or radial neuropathy) or cervical radiculopathy
  3. No history of surgery involving the ulnar nerve (e.g. nerve transposition)
  4. Normal motor and sensory examination of the upper extremities
  5. Normal routine EMG (nerve conduction studies and needle examination, including needle examination of the FDI)
  6. Age > 18 years

Exclusion Criteria:

  • Findings of other neuromuscular process on EMG (median neuropathy,ulnar neuropathy, radial neuropathy, brachial plexopathy, C8-T1 radiculopathy, myopathy, motor neuron disease, peripheral neuropathy, etc.)
  • Previous ulnar nerve surgery

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

Jacksonville, Fla.

Mayo Clinic principal investigator

Devon Rubin, M.D.

Closed for enrollment

More information


Publications are currently not available

Study Results Summary

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Supplemental Study Information

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