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Surgical and Radiologic Anatomy

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01-02-2017 | Original Article

Sternocleidomastoid innervation from an aberrant nerve arising from the hypoglossal nerve: a prospective study of 160 neck dissections

Authors: Peter A. Brennan, Peyman Alam, Mostafa Ammar, Constantine Tsiroyannis, Eirini Zagkou, Susan Standring

Published in: Surgical and Radiologic Anatomy | Issue 2/2017

Abstract

Background

Anatomical variants of the spinal root of the accessory nerve and cervical plexus are well known but other variants are exceptionally rare.

Methods

A prospective study of 160 selective neck dissections was undertaken following an index case, where a presumed C1 nerve (travelling with the hypoglossal nerve) was found to innervate sternocleidomastoid (SCM). A search was subsequently made for this variant while not compromising the neck dissection surgery itself. Eight cases could not be included due to metastatic disease precluding safe dissection in this area. A nerve stimulator was used to confirm the motor supply to SCM.

Results

This nerve variant was found in 4/160 necks (2.5 %). In all cases, it originated directly from the hypoglossal nerve and stimulation resulted in isolated SCM contraction. No accessory nerve anomalies were found.

Conclusion

This finding adds to the knowledge of variants in this area. Meticulous dissection and preservation of all nerves, where possible, is important for optimising functional outcomes following surgery.

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Title: Sternocleidomastoid innervation from an aberrant nerve arising from the hypoglossal nerve: a prospective study of 160 neck dissections
Authors: Peter A. Brennan
Peyman Alam
Mostafa Ammar
Constantine Tsiroyannis
Eirini Zagkou
Susan Standring
Publication date: 01-02-2017
Publisher: Springer Paris
Published in: Surgical and Radiologic Anatomy / Issue 2/2017
Print ISSN: 0930-1038
Electronic ISSN: 1279-8517
DOI: https://doi.org/10.1007/s00276-016-1723-9

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Springer Medicine

Sternocleidomastoid innervation from an aberrant nerve arising from the hypoglossal nerve: a prospective study of 160 neck dissections

Abstract

Background

Methods

Results

Conclusion

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Abstract

Background

Methods

Results

Conclusion

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