Lecture18: Brachial Plexus Flashcards
What is the origin of the lateral cord?
Anterior cords of upper and middle trunks
What is the origin of the medial cord?
Anterior cord of lower trunk
What does the Dorsal Scapular nerve of C5 supply?
Rhomboids
What does the long thoracic nerve of the C5,6, and 7 supply?
Serratus anterior
What do both suprascapular nerve and the nerve to subclavius arise from? Which trunk
Upper trunk ( C5,6 )
What cord does the Ulnar nerve arise from?
Medial cord
What cord does the Musculocutaneous nerve arise from?
Lateral cord ( C5,6,7)
What cord do both axillary and and radial nerves arise from?
Posterior cord
What cord does the nerve to latissmuss dorsi arise from?
Posterior cord
What does the axillary nerve supply?
The delts (deltoid)
What muscles do the musculocutaneous nerves supply?
All the muscles of the front of the arm
What muscles does the ulnar nerve supply?
Medial side of the front of the forearm and hand muscles, but not thumb
What muscles does the medial nerve supply?
Front of forearm, thumb muscles
What does the radial nerve supply?
Muscles of the arm and back
What cord do both subscapular nerves arise from?
Posterior cord
What does a motor deficit of the radial nerve lead to?
Wrist drop
What does motor deficit of the median nerve lead to?
Ape hand (unable to grasp objects)
What does motor deficit of the ulnar nerve lead to?
Claw hand (unable to spread fingers)
Which triangle of the neck are roots and trunks found?
Posterior triangle
Where are chords and branches found?
In the axillary
