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ANTERIOR INTEROSSEOUS NERVE TRANSFERS FOR THE TREATMENT OF RADIAL NERVE INJURIES.

Edie Benedito Caetano1, Luiz Angelo Vieira1, Vinicius Santos Bueno1

  • 1Pontificia Universidade Catolica de Sao Paulo (PUC), Faculdade de Ciencias Medicas e da Saude, Sorocaba, Sao Paulo, SP, Brazil.

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Summary

The pronator quadratus branch (PQB) of the anterior interosseous nerve (AIN) is consistently present and can be transferred to the posterior interosseous nerve (PIN) without tension, offering a viable surgical option.

Keywords:
CadaverDissectionForearmMusclesReconstructive Surgical Procedures

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Area of Science:

  • Anatomy
  • Surgical Innovation
  • Neuroscience

Background:

  • The anterior interosseous nerve (AIN) and posterior interosseous nerve (PIN) are crucial for forearm and hand function.
  • Understanding anatomical variations is vital for nerve transfer procedures.
  • The pronator quadratus branch (PQB) is a potential donor for nerve reconstruction.

Purpose of the Study:

  • To evaluate the anatomical characteristics and variations of the AIN.
  • To determine the feasibility of transferring the PQB to the PIN without tension.

Main Methods:

  • Dissection of 50 upper limbs from 25 adult male cadavers.
  • Detailed examination of the origin and branching patterns of the AIN and PIN.
  • Assessment of the PQB's presence and its transferability to the PIN.

Main Results:

  • The AIN originated from the median nerve at an average of 5.2 cm distal to the intercondylar line.
  • Variations in AIN origin from median nerve fascicles were noted; two AINs were found in 2 specimens.
  • The PQB was consistently present in all dissected forearms, with variations only in diameter.

Conclusions:

  • The PQB is reliably present and suitable for nerve transfer.
  • Transferring the PQB to the PIN is feasible without tension, even with full forearm range of motion.