Contents

Brachial plexus

Origins  

Vertical rami of C5-T1 Occasionally it is prefixed i.e. C4 contributes; or it is post fixed i.e. T2 contributes

Parts  

Roots, trunks, divisions, cords and branches.

In relation to the clavicle, there are 3 parts namely

  1. Supraclavicular (cervical)-  Roots and trunks
  2. Clavicular (retroclavicular) Divisions
  3. Infraclavicular (axillary) Cords and branches

 


Formation  

Formation of trunks

  • Roots C5 and C6 unite to form the superior trunk [s.t]

  • Root C7 continues as the middle trunk [m.t]

  • Roots C8 and T1 unite to form the inferior trunk [i.t]

Formation of divisions and cords

  • Each trunk divides into an anterior and posterior division

  • The anterior divisions of the upper and middle trunk from the lateral cord [l.c].

  • The anterior division of the lower trunk continues as the medial cord [m.c]
  • All the posterior divisions form the posterior cord [p.c]

Home | Project Anatomy | Gross Anatomy | Topic index | Chapter 14

CHAPTER 14: THE PECTORAL REGION AND THE AXILLA