Brachial Plexus Flashcards
From what nerve roots does the Brachial Plexus arise?
C5 - T1
What is the order of structure for the Brachial Plexus?
Roots Trunks Divisions Cords Nerves
What are the 3 trunks of the Brachial Plexus?
Superior
Middle
Inferior
Which nerve roots form each trunk?
Superior = C5 and C6 Middle = C7 Inferior = C8 and T1
What are the divisions of the Brachial Plexus?
Anterior (Lateral and Medial)
Posterior
From what trunks do the divisions arise?
Lateral Anterior = Superior and Middle
Posterior = Superior, Middle and Inferior
Medial Anterior = Inferior
What are the cords of the Brachial Plexus?
Lateral (from Lateral Anterior Division)
Posterior (from Posterior Division)
Medial (from Medial Anterior Division)
What nerves arise from the Lateral Cord?
Musculocutaneous Nerve
What nerves arise from the Posterior Cord?
Radial Nerve
Axillary Nerve
What nerves arise from the Medial Cord?
Ulnar Nerve
What nerve arises from the joining of the Lateral and Medial Cords?
Median Nerve
What are signs of Radial, Ulnar or Median Nerve Damage/Pathology?
Radial Nerve = Wrist drop due to loss of extension
Ulnar Nerve = Inability to make a star with hand due to loss of digit abduction
Median Nerve = Inability to make ‘Okay’ sign due to loss of digit opposition
