Axillary sheath

Axillary sheath

Axillary artery and its branches - anterior view of right upper limb and thorax (axillary sheath not labeled, but region is visible)

Anatomical terminology

The axillary sheath is a fibrous sheath that encloses the first portion of the axillary artery, together with the axillary vein and the brachial plexus (though some sources suggest the axillary vein lies entirely outside the sheath[1]). It is an extension of the prevertebral fascia of the deep cervical fascia.

A brachial plexus nerve block can be achieved by injecting anaesthetic into this area.[2]


This article incorporates text in the public domain from the 20th edition of Gray's Anatomy (1918)

  1. Last's Anatomy, 9th Edt
  2. Ay; Akinci, M.; Sayin, M.; Bektas, U.; Tekdemir, I.; Elhan, A. (2007). "The axillary sheath and single-injection axillary block". Clinical Anatomy. 20 (1): 57–63. doi:10.1002/ca.20270. PMID 16372345.

External links

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