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Anatomy Atlases: Illustrated Encyclopedia of Human Anatomic Variation: Opus III: Nervous System: Plexuses: Axillary Nerve

Illustrated Encyclopedia of Human Anatomic Variation: Opus III: Nervous System: Plexuses

Axillary Nerve

Ronald A. Bergman, PhD
Adel K. Afifi, MD, MS
Ryosuke Miyauchi, MD

Peer Review Status: Internally Peer Reviewed


The axillary nerve may be derived solely from the fifth cervical nerve; the contribution from the sixth cervical may be insignificant or absent altogether.

It may pierce and supply a branch to m. subscapularis.

Branches to the long head of the triceps and infraspinatus muscles have been described.

The nerve to teres major may arise from the axillary nerve instead of the lower subscapular nerve.

The axillary and lower subscapular nerves have been found traversing subscapularis beneath an accessory subscapular muscle. Breisch considered the arrangement a possible nerve entrapment site.

Image 31A Image 31B Image 31C Image 31D Image 31E Image 31F

Image 31G Image 31H Image 31I Image 31J


References

Birmingham, A. (1889) Homology and innervation of the achselbogen and pectoralis quartus, and the nature of the lateral cutaneous nerve of the thorax. J. Anat. Physiol. 23:206-223.

Breisch, E.A. (1986) A rare variation: the relationship of the axillary and inferior subscapular nerves to an accessory subscapularis muscle. Anat. Rec. 216:440-442.

Henle, J. (1868) Handbuch der Systematischen Anatomy des Menschen. von Friedrich Vieweg und Sohn., Braunschweig.

Gerard, G. and P. Cordier. (1920) Anomalies dans la distribution du nerf circonflex. Soc. Biol. Comptes Rendus Hebdomadaires des Séances et Mémoires 83:927-929.

Latarjet, A. (1948) Testut's Traité d'Anatomie Humaine, 9th ed., G. Doin & Cie., Paris.

Schaefer, E.A., Symington, J. and T.H. Bryce, Eds. (1915) Quain's Anatomy, 11th ed., Longmans, Green, and Co., London.

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