Posterior division of inferior trunk of brachial plexus
Divisio posterior trunci inferioris plexus brachialis
- Related terms: Posterior division
Definition
The inferior trunk of the brachial plexus splits into an anterior and a posterior division. The posterior division of inferior trunk of brachial plexus joins with the posterior divisions of the superior and middle trunks in the axilla to form the posterior cord of the brachial plexus.
Importantly, no nerve branches originate directly from the divisions of the brachial plexus.
References
Polcaro L, Charlick M, Daly DT. Anatomy, Head and Neck: Brachial Plexus. [Updated 2023 Aug 14]. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2025 Jan-. Available from: https://www.ncbi.nlm.nih.gov/books/NBK531473/
Drake, R.L., Vogl, A.W., and Mitchell, A.W.M. (2010). ‘Chapter 2: The Back’, in Gray’s anatomy for students. (2nd ed.) Churchill Livingstone Elsevier, Philadelphia PA 19103, pp.95-99 & Fig. 2.44 & 2.45.
Johnson EO, Vekris M, Demesticha T, Soucacos PN. Neuroanatomy of the brachial plexus: normal and variant anatomy of its formation. Surg Radiol Anat. 2010 Mar;32(3):291-7.
