Brachial Plexus Flashcards
The Anterior Rami of what nerves are included in the Brachial Plexus?
C5, C6, C7, C8, T1
(Roots)
What are the Parts of the Brachial Plexus in Order?
Roots
Trunks
Divisions
Cords
Branches
Which Roots join together and which dont? What do they Form?
C5 and C6 = Upper Trunk
C7 = Middle Trunk
C8 and T1 = Lower Trunk
Each Trunk divides into Anterior & Posterior Divisions
Trunks
Which Nerves Branch off of C5 before the Upper Trunk is Formed?
Dorsal Scapular Nerve
(Rhomboid Major/Minor)
Suprascapular Nerve
(Supraspinatus and Infraspinatus)
What other Nerve Branch is formed before the Trunks join together? Which Roots are included in this?
C5, C6 & C7 Join to form the Long Thoracic Nerve
(Serratus Anterior)
The Anterior Divisions of which Trunks Join together?
Which don’t?
What do they Form?
Upper & Middle Trunk Anterior Divisons form the Lateral Cord
The Lower Trunk form the Medial Cord
The Posterior Divisions of which Trunks Join together?
Which don’t?
What do they Form?
All 3 Posterior Divisons join to form the
Posterior Cord
How are Cords labelled?
according to how they orient relative to the axillary artery
Which Branches are formed by the LATERAL Cord?
Lateral Pectoral
Musculocutaneous
Median
Which Branches are formed by the POSTERIOR Cord?
Axillary
Radial
Thoracodorsal
Upper and Lower Subscapular
Which Branches are formed by the MEDIAL Cord?
Medial Pectoral
Medial Cutaneous Nerve of Forearm
Medial Cutaneous Nerve of Arm
Ulnar Median
The lateral and medial cord join to form which terminal branch?
Median
What are the 5 Terminal Branches of the BP?
Musculataneous
Axillary
Radial
Median
Ulnar
Now draw the Brachial Plexus in its entirety?
dermatomes of the arm
